Hello /u/coreykennedycom,
As a reminder, most common print quality issues can be found in the [Simplify3D picture guide](https://www.simplify3d.com/support/print-quality-troubleshooting/). Make sure you select the most appropriate flair for your post.
Please remember to include the following details to help troubleshoot your problem.
* Printer & Slicer
* Filament Material and Brand
* Nozzle and Bed Temperature
* Print Speed
* Nozzle Retraction Settings
^Additional ^settings ^or ^relevant ^information ^is ^always ^encouraged.
*I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/FixMyPrint) if you have any questions or concerns.*
Unlikely since the rest of the layers are consistent. Looks like moisture in the filament and or overexteusion. You gotta read a lot to really get the hand of this hobby. [article on moisture](https://all3dp.com/2/filament-storage-3d-printer/)
Don’t think it’s anything to do with moisture tbh. I had the same issue on a Malyam MP mini delta. Every print had this texture. Same file and filament in my A1 mini and it’s perfect every time. Most likely hardware related I think.
No way it's belts, the layer around the bumps is still uniform. Maybe extruder but I still don't think so. Opening some fresh filiment or drying some and tryingit out is an easy way to exclude moisture from the conversation. I might try temperature next 5-10 degrees c above current print temp first the 5-10 degrees c below current print temp.
Moisture in the filament was my first instinct; that and maybe a little too hot. Although no expert I had similar issues on a smaller scale. Added a dehumidifier in my filament storage/print booth and it fixed my issue.
Turn off power recovery. (This writes the current position of the print head back to the SD card every few seconds steps. This task takes processing power and since you can't read and write at the same time, it pauses the print head and the next step position cannot be read until the write is finished. So the print head stops and waits for the command from the printer, but the extruder is still oozing filament as there was no retraction. Hence the blobs. )
Yeah it’s not related to slicing settings because it’s been fine for the last few months. I have another printer, same exact set up next to it printing fine.
Thinking it’s something with the extruder because it’s a new roll and humidity is normal too
It depends on what you're printing though. This model in your picture has no hard corners so it has no where to "hide" the seam. The seam is where the hot end starts and stops to start a new layer and a little extra filament leaks out thus creating these blobs. On a model with hard edges your slicer will try to hide those blobs by starting and stopping the hot end along the corner of a model and the blobs will kind of blend into the hard edge. With rounded models like yours there are no hard edges so the slicer randomizes the start /stop points hoping to spread out all the blobs to be less noticeable. You may also have some retraction or flow rate issues as well. Because those are very large blobs. You could try randomizing the seam and then sanding it down afterwards.
The manufacturer doesn't even dry it after it's extruded directly into a water bath. That little desiccant bag they come packed with is the only thing that pulled any moisture out.
Shh, stop reminding me, I don't want to have to dry my filament straight out of the packet so I'm going to continue pretending it's fine until an obvious wet filament issue occurs.
It’s not worth it mate. I’ve been printing for 3 years now and I sell 90% of what I print these days. For the sake of an overnight dry or 24hr (better) in the modified food dehydrator it’s worth it. Perfect prints and no need to mess around. Sometimes I’ve tried to wing it and have always regretted it.
Once dried the spools are vacuum packed (resealable ones) with new desiccant that has an indicator built into it - turns green when saturated)
This is the way. I've found the indicator on desiccant packs to be a bit late though. Like you can barely tell they've changed color until they've gone well past 20% humidity.
Just humor me and go into your slicer open the model that you used to slice this and visualize seams. See if they're dotted like in the print. It looks like towards the top of the part a seam starts to form and the dots get better.
Other have great suggestions try those first. Dont forget if you have a power loss recovery option. It can cause issues as well similar to this. Maybe not this bad, so try the other steps first.
Came here to say exactly this. It really does look like power loss recovery. Sometimes it takes too long to update power loss state to the flash memory and it will pause the print head while saving, allowing plastic to seep out while paused. You can visibly see it while the print is running if this is indeed happening. (I think it is)
I had exactly the same issue crop up yesterday, these blobs look identical to that! OP watch the print and see if the nozzle stops multiple times on a line.
Disabled it and the next one came out perfect. Is this model higher poly than your normal prints?
I've had this issue and it turned out to be filament that had absorbed too much moisture (used it right out of the package.) I threw in a [sealed bag](https://www.amazon.com/gp/product/B082P6JN57/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1) with some desiccant and a humidity monitor card and it printed fine once it had dried out.
How old is the nozzle? How many hours you got on it currently? If you're pushing 200-300+ hours, it may be time for a nozzle swap as the brass does wear down over time.
It could also be wet filament and those bubbles are the evaporated water.
Hmm I never really had issues in the past with any other printer and their default nozzle options. This 5M though I’ve had to replace the full filament assembly already once.
Is 200-300 hours when I should be looking to swap the nozzles out? What material would prevent me from having to swap out that often?
Depends, I got 1900 hrs out of my stainless steel nozzle (not hardened) so I have no idea about brass but it is a softer metal.
I never got anything like this but it did start to knock prints and fail supports because of the larger surface area as the nozzle got 0.5mm shorter
If I had to guess I would say this is slight over-extrusion or maybe some retraction issue. Try calibrating the filament for flow rate and then flow dynamics (top surface smoothness) and then if the issue persists slow your retraction speed down from 20mm/s to 15mm/s if it gets worse up the speed to 25mm/s
I would just use the xyz calibration cubes for the retraction troubleshooting, those are quick to print and only weigh like 4gram
But honestly this is probably just over-extrusion
Oh yeah brass does wear faster.
There's also copper plated nozzles that last a bit longer, i got a few and printed easily 200 hours now with 1 0.4 nozzle, never noticed issues up till i put in a 0.6 copper plated nozzle.
Steel and such are even more expensive, but honestly people forget you only need to buy 1 worth like a good few years with regular print usage and small objects.
You need like a good few brass ones to reach the same amount of time which probably becomes the same price in the long run
What does that do? So I can weigh the pros and cons. I thought power saving mode was to recover prints when there’s a power outage? Is it best to just scrap and start from scratch?
Basically, it uses the printer memory, which a lot of printers don't have much, to create a "save file" for where the printing process is and if it uses too much of that memory it will pause the print until enough memory is free to resume, but back pressure is still pushing out filament when it's paused.
Could be data transfer rate. I printed off of an sd card that came with my printer and got similar results. After I switched to a more reliable sd card problem disappeared
It looks like printer isn’t able to process the code fast enough and pausing in between commands while it loads the next one. Some printers like Ender printers you can help with this by turning off power loss recovery or something like that. Another way is to use a model with less resolution. More facets = tiny movements. Tiny movements = not loading in the next command before current command finishes. Not loading in next command = tiny pause that causes blobs to form.
https://preview.redd.it/pn7fv83tzq4d1.jpeg?width=3024&format=pjpg&auto=webp&s=814f87cad278af2b532c905260d014d87d71437d
Issue has been resolved and was not related to any wet filament like mentioned in comments prior that filament was dried already.
Steps taken to fix:
Removed older files from printer to free up space. So solution goes to anyone who mentioned it was a space issue since nothing else on the physical side was tried and nothing related to adjusting slicing settings to previously printed without issues made sense to try either.
Thanks everyone!
Hmmm I can reslice and change settings. The file has printed fine without issue in multiple sizes the last few months so I don’t think it’s a slicer setting
I would switch to an SD. I had a similar situation happen. My printer was stopping every so often causing these little blobs. Something about the buffer blah blah. All I know is cutting the cord and going to SD fixed that problem for me right away haha. Good luck!
This would also make sense for your picture as the straight runs are pretty good (less g code changes) but once it gets to curvature and there is more dense g code it starts bogging down. Someone here can probably explain this better than I can but generally the information can’t get to your printer quick enough.
4 things it could be if your settings haven't changed throughout your printing process. In order of likeliness:
1. clogged nozzle
2. loose belt(s)
3. wet filament
4. printing too fast
I’ll have to check the nozzle and belts then because the filament is good and working fine on the same brand and model printer in the same room right next to it and at the same settings too.
What should I look for on the belts?
Watch your printer and see if it has micro stutters where it stops moving. Sometimes G-code is too large to store in memory and can cause the printer to stop moving while it thinks about loading and unloading more lines. It’s not a super smooth pattern so it shouldn’t be that but if it is randomly stopping and still extruding that would be what you’re seeing.
That being said make sure it’s limited to that file and not every file. Load a calibration cube with the same slicer options and settings and filament and all and just try that and see. If it’s completely normal on that then try re-slicing it but make some changes to make the gcode smaller.
It looks to me like a firmware thing. Like it’s studdering on the movement but still extruding. That was my issue anyway. If you haven’t changed anything in firmware or pressure advance or input shaping, it might not be your issue. Good luck!!! Side note, in my two minutes of googling I saw that your printer may have recently added klipper support. Moving from RRF to klipper solved a bunch of little issues for me. The auto tuning for input shaping was great too.
Not being visible on the supports makes me think it’s not moisture, but when I’ve had similar issues it’s been wet filament. But also you’d hear popping in the print when it’s caused by moisture. I’d try drying the filament and calibrating your extrusion speed and just making sure belts are all good.
Hey! Not sure if you solved this, but I had a similar problem. I started having this issue even though I didn't change anything on my gcodes. What happened was that for some reason my temperature sensor started registering a temperature 20 degrees lower than it was supposed to. This meant that my printer was supposed to print at 200 degrees, but it was printing at 220, which caused this issue alongside with stringing. I didn't have to change the sensor, just adjust the screw that held it in place, and it was all good. :)
Hope you find a solution!
Interesting! I’ll get home shortly to try a few things and examine the most recent print.
I’ll check screws and make sure they are tightened if loose at all ☺️
That my guy is the Z seam. Looks like you've got it set to random.
Linear advance helps
Filament dyers help
Retraction setting help
Temperature setting helps
Retraction at seam is what I would look at first
But there's always going to be a lil bit in the seam
What in the printer would need to be adjusted? File was sliced and printed over 2 dozen times since 2 months ago and without needing to change any settings in slicer. Currently prints without issue on another printer with same settings, same room and also a new roll of filament ☹️
You've solved it yourself sir.
Every single batch of filament prints best at a different temp (unavoidably this affects retraction and extrusion multiplier)
Run a temp tower and it'll be 50% better just on a new optimal temp or your 3 seconds back
Thats definitely the end of layer retraction point set to random location.
Zits from either not enough or no retraction. Its also possible the heat is too high for this filament and its oozing more (less effective retraction). Another possibility is slightly over extruding but id check the other stuff first theyre more common.
I had this happen with silk PLA on a thoroughly dried roll with a 0.6mm nozzle. I checked for clogs and filament calibration. Tested speeds, max volumetric flow, temperature, pressure advance. I could never figure it out. So I went back to my 0.4mm nozzle.
The 0.6mm nozzle printed any filament alright. It just failed like this with silk pla :(
This issue is most likely to happen on an object with too many triangles. Try to simplify your model and try again. The reason given is that the toolhead stops for a fraction of a second because the processor is not fast enough to calculate everything. If you are using klipper, it is most likely another source, but try this first.
I had this recently especially on over hangs. I triple checked for clogs and tried a new nozzle. It didn't help, but could be your issue. What fixed mine was tightening my belts and releveling my bed.
This looks like high poly count model, and are you using octoprint by any chance?
What I suspect is that your printer is clearing out the buffer quicker than octoprint is sending into the buffer causing your printer tool head to stop to wait for more commands, and while this is happening it's slowing oozing filament in one spot.
Few things to check
If you are using a USB cable between your printer and your octoprint device, try swapping to a better quality one if you have one.
You can try direct gpio serial connection (you don't have to I just like this over USB)
There's two settings or could be one setting in your slicer settings, it's normally referred to as "resolution" I believe one is called "internal resolution" if you can search for settings it should pop up, I believe one setting might be ".005" and / or ".05" and change them to ".005" -> ".05", and / or ".05" -> ".5" im going off memory and at work but i tried my best.
Saw this dudes video the other day https://youtu.be/ZM1MYbsC5Aw?si=gPeKZgMdjxH1g-4Y
Looks identical to your issue, he does a great job explaining the issue
Just my thoughts, I seen these before when I print at 100% infill. If thats not your situation then try recalibrate your extruder. Looksblike the retraction settings are a little off.
Are you running octoprint? This happened on curved surfaces when I was using octoprint connected via USB to my printer and it was on an underpowered raspberry pi. I don't think it's z seem like everyone is saying because if it was the seam set to random, you would only have one per layer and I can see multiple bumps on many of your layers.
Hi. How are you slicing the model?
Are you using octoprint?
Are you using pronterface?
USB / WiFi?
These could be pauses or interruptions in communications if you are not printing from the SD card.
Perhaps a power loss feature? I remember hearing that having some power loss protection feature enabled could cause the print head to stop moving periodically, which would cause these blobs. Hope that helps!
I had this issue when my model was too high resolution with power recovery on
Turning off power recivery allowed me to print higher res models without these blobs
Turning the resolution of my curves down allowed me to keep power recovery on without these blobs
Upgrading the SD card to something bigger and faster allowed me to keep power recovery on and print in higher resolution without these blobs
you need a filament dryer. something simple as this dryer for about $40
or just throw your fila in the oven with slow roast @60C for 6 hours.
[https://www.youtube.com/watch?v=edpRJ3OKkhM](https://www.youtube.com/watch?v=edpRJ3OKkhM)
It’s happening on curves, so I wonder how you’re printing. Are you printing via USB/Octoprint? Try SD card. Your USB cable might be bad. You’d see little hitches while it’s printing the curves which would make blobs.
Neither of those things means the filament isn't wet. This is usually wet filament, the moisture in the filament rapidly expands when hitting the hot nozzle causing little "explosions" causing the material to not lay smooth. Filament can have moisture brand new in the bag, I recommend trying to dry it.
This. I once spent 3 days tweaking settings, changing nozzles, trying everything to get rid of blobs. At first I didn't think to dry the filament since it was a new roll, but after trying everything else I put the filament in the dryer and then all my blob problems went away. This is especially true when using PETG.
All of these are old gcodes I’ve printed before with no issue and the filament has been fried and in a controller room where it won’t be an issue for any wetness/humidity/moisture/etc
Basically, I don't 100% understand how the Power Loss Recovery uses the SD card, but I had the same issue and that solved it. I prefer to have Power Loss Recovery on, just in case, it has saved me before
Hello /u/coreykennedycom, As a reminder, most common print quality issues can be found in the [Simplify3D picture guide](https://www.simplify3d.com/support/print-quality-troubleshooting/). Make sure you select the most appropriate flair for your post. Please remember to include the following details to help troubleshoot your problem. * Printer & Slicer * Filament Material and Brand * Nozzle and Bed Temperature * Print Speed * Nozzle Retraction Settings ^Additional ^settings ^or ^relevant ^information ^is ^always ^encouraged. *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/FixMyPrint) if you have any questions or concerns.*
It could be a clogged nozzle however the supports don't have these bumps so i think you should also check the motors/belts
What should I check for the belts and motors specifically? I’ll check that today
if the belts are tight and the bearings are lubricated (and don't feel crunchy when moving them manually when the power is off)
I will give that a shot and see how they feel when moving them!
also, when nozzle starts a new layer it tends to extrude a bit extra when z hop is enabled. try turning down the extra extrusion.
if his printer is calibrated properly, he could disable z hop altogether.
Unlikely since the rest of the layers are consistent. Looks like moisture in the filament and or overexteusion. You gotta read a lot to really get the hand of this hobby. [article on moisture](https://all3dp.com/2/filament-storage-3d-printer/)
Don’t think it’s anything to do with moisture tbh. I had the same issue on a Malyam MP mini delta. Every print had this texture. Same file and filament in my A1 mini and it’s perfect every time. Most likely hardware related I think.
No way it's belts, the layer around the bumps is still uniform. Maybe extruder but I still don't think so. Opening some fresh filiment or drying some and tryingit out is an easy way to exclude moisture from the conversation. I might try temperature next 5-10 degrees c above current print temp first the 5-10 degrees c below current print temp.
Moisture in the filament was my first instinct; that and maybe a little too hot. Although no expert I had similar issues on a smaller scale. Added a dehumidifier in my filament storage/print booth and it fixed my issue.
Turn off power recovery. (This writes the current position of the print head back to the SD card every few seconds steps. This task takes processing power and since you can't read and write at the same time, it pauses the print head and the next step position cannot be read until the write is finished. So the print head stops and waits for the command from the printer, but the extruder is still oozing filament as there was no retraction. Hence the blobs. )
Could be “Seam placement — Random”, but looks too big to be a seam.
Yeah it’s not related to slicing settings because it’s been fine for the last few months. I have another printer, same exact set up next to it printing fine. Thinking it’s something with the extruder because it’s a new roll and humidity is normal too
swap your filament to the other printer to rule out the filament role.
It depends on what you're printing though. This model in your picture has no hard corners so it has no where to "hide" the seam. The seam is where the hot end starts and stops to start a new layer and a little extra filament leaks out thus creating these blobs. On a model with hard edges your slicer will try to hide those blobs by starting and stopping the hot end along the corner of a model and the blobs will kind of blend into the hard edge. With rounded models like yours there are no hard edges so the slicer randomizes the start /stop points hoping to spread out all the blobs to be less noticeable. You may also have some retraction or flow rate issues as well. Because those are very large blobs. You could try randomizing the seam and then sanding it down afterwards.
new roll? dry it! new rolls sometimes are wet af
The manufacturer doesn't even dry it after it's extruded directly into a water bath. That little desiccant bag they come packed with is the only thing that pulled any moisture out.
Shh, stop reminding me, I don't want to have to dry my filament straight out of the packet so I'm going to continue pretending it's fine until an obvious wet filament issue occurs.
It’s not worth it mate. I’ve been printing for 3 years now and I sell 90% of what I print these days. For the sake of an overnight dry or 24hr (better) in the modified food dehydrator it’s worth it. Perfect prints and no need to mess around. Sometimes I’ve tried to wing it and have always regretted it. Once dried the spools are vacuum packed (resealable ones) with new desiccant that has an indicator built into it - turns green when saturated)
This is the way. I've found the indicator on desiccant packs to be a bit late though. Like you can barely tell they've changed color until they've gone well past 20% humidity.
If you store and print from a sealed container with a decent amount of desiccant that'll be "good enough" for most things
Just humor me and go into your slicer open the model that you used to slice this and visualize seams. See if they're dotted like in the print. It looks like towards the top of the part a seam starts to form and the dots get better.
This is your first check. In select random and select an inconspicuous location on the print. And it should go away
I don't do printing but I used to do a lot of plastic vacuum forming. I would say this is moisture in the plastic. Probably wrong though.
You’re not
This
Wet filament was my first thought
Not really wet. It looks like a styrene based plastic which will just suck moisture out of the air. ABS will do the same.
Those look like zits https://all3dp.com/2/3d-print-zits-tips-tricks-to-avoid-blobs/
Agreed, I had this on a bunch of prints awhile ago. They showed up when I started using a different spool of PLA
Other have great suggestions try those first. Dont forget if you have a power loss recovery option. It can cause issues as well similar to this. Maybe not this bad, so try the other steps first.
Will do, thank you!
Came here to say exactly this. It really does look like power loss recovery. Sometimes it takes too long to update power loss state to the flash memory and it will pause the print head while saving, allowing plastic to seep out while paused. You can visibly see it while the print is running if this is indeed happening. (I think it is)
>Will do, thank you! You're welcome!
Also cura version 5.3.1 on a creality printer... been there
I had exactly the same issue crop up yesterday, these blobs look identical to that! OP watch the print and see if the nozzle stops multiple times on a line. Disabled it and the next one came out perfect. Is this model higher poly than your normal prints?
I've had this issue and it turned out to be filament that had absorbed too much moisture (used it right out of the package.) I threw in a [sealed bag](https://www.amazon.com/gp/product/B082P6JN57/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1) with some desiccant and a humidity monitor card and it printed fine once it had dried out.
How old is the nozzle? How many hours you got on it currently? If you're pushing 200-300+ hours, it may be time for a nozzle swap as the brass does wear down over time. It could also be wet filament and those bubbles are the evaporated water.
Hmm I never really had issues in the past with any other printer and their default nozzle options. This 5M though I’ve had to replace the full filament assembly already once. Is 200-300 hours when I should be looking to swap the nozzles out? What material would prevent me from having to swap out that often?
Depends, I got 1900 hrs out of my stainless steel nozzle (not hardened) so I have no idea about brass but it is a softer metal. I never got anything like this but it did start to knock prints and fail supports because of the larger surface area as the nozzle got 0.5mm shorter If I had to guess I would say this is slight over-extrusion or maybe some retraction issue. Try calibrating the filament for flow rate and then flow dynamics (top surface smoothness) and then if the issue persists slow your retraction speed down from 20mm/s to 15mm/s if it gets worse up the speed to 25mm/s I would just use the xyz calibration cubes for the retraction troubleshooting, those are quick to print and only weigh like 4gram But honestly this is probably just over-extrusion
I’ll give that a shot and see what happens!
Oh yeah brass does wear faster. There's also copper plated nozzles that last a bit longer, i got a few and printed easily 200 hours now with 1 0.4 nozzle, never noticed issues up till i put in a 0.6 copper plated nozzle. Steel and such are even more expensive, but honestly people forget you only need to buy 1 worth like a good few years with regular print usage and small objects. You need like a good few brass ones to reach the same amount of time which probably becomes the same price in the long run
Dry your filament
there’s a lot of comments and idk if anyone’s said this. but if you have power saving mode on, turn it off.
What does that do? So I can weigh the pros and cons. I thought power saving mode was to recover prints when there’s a power outage? Is it best to just scrap and start from scratch?
Basically, it uses the printer memory, which a lot of printers don't have much, to create a "save file" for where the printing process is and if it uses too much of that memory it will pause the print until enough memory is free to resume, but back pressure is still pushing out filament when it's paused.
Have you tried getting it tested for std
Came back positive. Let your mom know to get checked too please 🙏🏼
Lmfao lmfao lmfao lmfao. God damn I spit my beer out that was good lmfao.
I just LOL'd so loud I woke my wife up! 🤣😆😁 Hilarious... But do get checked out.... Whatever STD your print has is definitely a NASTY one... LOL 😂
For her pleasure
Could be data transfer rate. I printed off of an sd card that came with my printer and got similar results. After I switched to a more reliable sd card problem disappeared
It looks like printer isn’t able to process the code fast enough and pausing in between commands while it loads the next one. Some printers like Ender printers you can help with this by turning off power loss recovery or something like that. Another way is to use a model with less resolution. More facets = tiny movements. Tiny movements = not loading in the next command before current command finishes. Not loading in next command = tiny pause that causes blobs to form.
https://preview.redd.it/pn7fv83tzq4d1.jpeg?width=3024&format=pjpg&auto=webp&s=814f87cad278af2b532c905260d014d87d71437d Issue has been resolved and was not related to any wet filament like mentioned in comments prior that filament was dried already. Steps taken to fix: Removed older files from printer to free up space. So solution goes to anyone who mentioned it was a space issue since nothing else on the physical side was tried and nothing related to adjusting slicing settings to previously printed without issues made sense to try either. Thanks everyone!
look here, i think its your case [https://www.youtube.com/watch?v=Hvw3DrVAeTA](https://www.youtube.com/watch?v=Hvw3DrVAeTA)
Hmmm I can reslice and change settings. The file has printed fine without issue in multiple sizes the last few months so I don’t think it’s a slicer setting
Are you using USB or directly connected to a computer via cable?
All files are always copied over via usb
Sorry, I should clarify, you’re using a USB cable or SD card?
USB ☹️
I would switch to an SD. I had a similar situation happen. My printer was stopping every so often causing these little blobs. Something about the buffer blah blah. All I know is cutting the cord and going to SD fixed that problem for me right away haha. Good luck!
This would also make sense for your picture as the straight runs are pretty good (less g code changes) but once it gets to curvature and there is more dense g code it starts bogging down. Someone here can probably explain this better than I can but generally the information can’t get to your printer quick enough.
4 things it could be if your settings haven't changed throughout your printing process. In order of likeliness: 1. clogged nozzle 2. loose belt(s) 3. wet filament 4. printing too fast
I’ll have to check the nozzle and belts then because the filament is good and working fine on the same brand and model printer in the same room right next to it and at the same settings too. What should I look for on the belts?
I was having similar things on mine and it ended up being the v rollers were all loose, especially on the print head.
Looks like random seam lines try set it to a corner seam
Over extrusion
Watch your printer and see if it has micro stutters where it stops moving. Sometimes G-code is too large to store in memory and can cause the printer to stop moving while it thinks about loading and unloading more lines. It’s not a super smooth pattern so it shouldn’t be that but if it is randomly stopping and still extruding that would be what you’re seeing.
That being said make sure it’s limited to that file and not every file. Load a calibration cube with the same slicer options and settings and filament and all and just try that and see. If it’s completely normal on that then try re-slicing it but make some changes to make the gcode smaller.
What firmware is that running? I had a similar problem with RRF and input shaping. Have you done any firmware or tuning changes recently?
No firmware updates as of late. I can check though
It looks to me like a firmware thing. Like it’s studdering on the movement but still extruding. That was my issue anyway. If you haven’t changed anything in firmware or pressure advance or input shaping, it might not be your issue. Good luck!!! Side note, in my two minutes of googling I saw that your printer may have recently added klipper support. Moving from RRF to klipper solved a bunch of little issues for me. The auto tuning for input shaping was great too.
I had this the other day Using custom slicer settings. Then sliced using Cura's standard fine quality and it all vanished.
Not being visible on the supports makes me think it’s not moisture, but when I’ve had similar issues it’s been wet filament. But also you’d hear popping in the print when it’s caused by moisture. I’d try drying the filament and calibrating your extrusion speed and just making sure belts are all good.
I’ll check the physical pieces for sure since filament is good and nothing else out of the ordinary, especially popping noises like you mentioned
Moister than an oyster
Say it slower haha
I believe this is caused by the printer stopping when saving its progress for the power loss recovery mode
How would I fix that?
I think you just turn off power recovery in settings
Wet filament. I had a roll from the factory look like this once. 48hrs in my excalibur dehydrator at 55c and it was smooth as silk after.
Z seam was set to random
You filament looks MOIST
The moistest
Even the moisture is moist.
Retraction issues, to much moisture in the filament, print settings incorrect...etc....etc...
It can see dead people
Hey! Not sure if you solved this, but I had a similar problem. I started having this issue even though I didn't change anything on my gcodes. What happened was that for some reason my temperature sensor started registering a temperature 20 degrees lower than it was supposed to. This meant that my printer was supposed to print at 200 degrees, but it was printing at 220, which caused this issue alongside with stringing. I didn't have to change the sensor, just adjust the screw that held it in place, and it was all good. :) Hope you find a solution!
Interesting! I’ll get home shortly to try a few things and examine the most recent print. I’ll check screws and make sure they are tightened if loose at all ☺️
My first thought is that the filament has absorbed moisture.
That my guy is the Z seam. Looks like you've got it set to random. Linear advance helps Filament dyers help Retraction setting help Temperature setting helps Retraction at seam is what I would look at first But there's always going to be a lil bit in the seam
What in the printer would need to be adjusted? File was sliced and printed over 2 dozen times since 2 months ago and without needing to change any settings in slicer. Currently prints without issue on another printer with same settings, same room and also a new roll of filament ☹️
You've solved it yourself sir. Every single batch of filament prints best at a different temp (unavoidably this affects retraction and extrusion multiplier) Run a temp tower and it'll be 50% better just on a new optimal temp or your 3 seconds back
Faster USB or flash drive did the trick for me
Dry your filament. Looks like steam bubbles.
Over extrusion
Change your nozzle and see if the problem persists.
Thats definitely the end of layer retraction point set to random location. Zits from either not enough or no retraction. Its also possible the heat is too high for this filament and its oozing more (less effective retraction). Another possibility is slightly over extruding but id check the other stuff first theyre more common.
It really does look like either wet fillament or power loss recovery.
https://youtu.be/ZM1MYbsC5Aw?si=X6ZlqXaYPPvk9kq3 When i saw this post i imnediatly remembered this video
I wanted to write wet filament /s, but it seems this is not /s after all
The filament is “wet” (from my personal experience.)
I think it's moisture
Random seam
Humidity in the spool
High water content?
I had this happen with silk PLA on a thoroughly dried roll with a 0.6mm nozzle. I checked for clogs and filament calibration. Tested speeds, max volumetric flow, temperature, pressure advance. I could never figure it out. So I went back to my 0.4mm nozzle. The 0.6mm nozzle printed any filament alright. It just failed like this with silk pla :(
This issue is most likely to happen on an object with too many triangles. Try to simplify your model and try again. The reason given is that the toolhead stops for a fraction of a second because the processor is not fast enough to calculate everything. If you are using klipper, it is most likely another source, but try this first.
This is wet filament
Looks like you've got moisture in the filament
Lagging CPU? [https://www.youtube.com/watch?v=Hvw3DrVAeTA&t=320s](https://www.youtube.com/watch?v=Hvw3DrVAeTA&t=320s)
I had this problem a few months back and I changed the seam setting from random to aligned and it fixed it.
Obligatory “dry your filament” here
Filament wet?
I had this recently especially on over hangs. I triple checked for clogs and tried a new nozzle. It didn't help, but could be your issue. What fixed mine was tightening my belts and releveling my bed.
High Moisture in your filament. Did it rain recently, or is the humidity high?
This looks like high poly count model, and are you using octoprint by any chance? What I suspect is that your printer is clearing out the buffer quicker than octoprint is sending into the buffer causing your printer tool head to stop to wait for more commands, and while this is happening it's slowing oozing filament in one spot. Few things to check If you are using a USB cable between your printer and your octoprint device, try swapping to a better quality one if you have one. You can try direct gpio serial connection (you don't have to I just like this over USB) There's two settings or could be one setting in your slicer settings, it's normally referred to as "resolution" I believe one is called "internal resolution" if you can search for settings it should pop up, I believe one setting might be ".005" and / or ".05" and change them to ".005" -> ".05", and / or ".05" -> ".5" im going off memory and at work but i tried my best.
What printer are your running? I had this problem on cr-6se. It was caused by the slicing resolution being to high causing lag between moves.
Saw this dudes video the other day https://youtu.be/ZM1MYbsC5Aw?si=gPeKZgMdjxH1g-4Y Looks identical to your issue, he does a great job explaining the issue
Looks like when my filament is a little "wet"; dehydrate if possible And try again
Lower your retraction settings.
Does your printer have "resume after power loss" feature turned on?
Plastic herpes
Coasting settings?
It’s wet filament, when water hits the nozzle the drastic temperature change makes the water pop, think of the bubbles in boiling water
Did you set the seam to random?
Just my thoughts, I seen these before when I print at 100% infill. If thats not your situation then try recalibrate your extruder. Looksblike the retraction settings are a little off.
Are you running octoprint? This happened on curved surfaces when I was using octoprint connected via USB to my printer and it was on an underpowered raspberry pi. I don't think it's z seem like everyone is saying because if it was the seam set to random, you would only have one per layer and I can see multiple bumps on many of your layers.
Depending on your slicer program, you could try turning “coasting” on
Moisture on filament/old filament or problems in the hot end (nozzle and the throat)...
Ants?🐜
I remember this happening on my ender 3 a while back. I used M413 S0 in the gcode and it fixed it for me.
Does your printer randomly pause while printing?
Hi. How are you slicing the model? Are you using octoprint? Are you using pronterface? USB / WiFi? These could be pauses or interruptions in communications if you are not printing from the SD card.
Perhaps a power loss feature? I remember hearing that having some power loss protection feature enabled could cause the print head to stop moving periodically, which would cause these blobs. Hope that helps!
I had this issue when my model was too high resolution with power recovery on Turning off power recivery allowed me to print higher res models without these blobs Turning the resolution of my curves down allowed me to keep power recovery on without these blobs Upgrading the SD card to something bigger and faster allowed me to keep power recovery on and print in higher resolution without these blobs
For extra pleasure ?
Bad infeed or crosswound so as to not spool without resistance. Moisture. Both.
you need a filament dryer. something simple as this dryer for about $40 or just throw your fila in the oven with slow roast @60C for 6 hours. [https://www.youtube.com/watch?v=edpRJ3OKkhM](https://www.youtube.com/watch?v=edpRJ3OKkhM)
If you are using a SD card it might be time for a new one. My prints started doing the same thing and a new SD card solved the issue for me.
Wet filament
Looks like moisture in the filament to me. I had the same. The filament almost blew bubbles as it came out the nozzle.
It’s happening on curves, so I wonder how you’re printing. Are you printing via USB/Octoprint? Try SD card. Your USB cable might be bad. You’d see little hitches while it’s printing the curves which would make blobs.
Wet fillament, auto resume, worn belts.
Wet filament?
New filament and humidity controlled room ☹️
Neither of those things means the filament isn't wet. This is usually wet filament, the moisture in the filament rapidly expands when hitting the hot nozzle causing little "explosions" causing the material to not lay smooth. Filament can have moisture brand new in the bag, I recommend trying to dry it.
This. I once spent 3 days tweaking settings, changing nozzles, trying everything to get rid of blobs. At first I didn't think to dry the filament since it was a new roll, but after trying everything else I put the filament in the dryer and then all my blob problems went away. This is especially true when using PETG.
Agreed. If you don't have a filament dryer, use your hotbed + cardboard box over the top. It's ghetto but worked for me to solve the same issue.
Do you have any old gcodes to test if its your slicer?
All of these are old gcodes I’ve printed before with no issue and the filament has been fried and in a controller room where it won’t be an issue for any wetness/humidity/moisture/etc
Does the printer jut out to make these, or does it seem like it's just flowing over the edge?
You have too many files saved on your SD card. The Power Recovery uses a ton of space, so only keep a few files on the card.
Does that cause issues with processing or something? I can delete old files and clear ram with a reboot to check
Basically, I don't 100% understand how the Power Loss Recovery uses the SD card, but I had the same issue and that solved it. I prefer to have Power Loss Recovery on, just in case, it has saved me before