1 Topic by mikeflynn

  • mikeflynn
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Topic: Filament Sticking to Extruder on Circular Prints

I'm consistently seeing an issue where, on circular prints, the filament will stick to the extruder nozzle rather than the previous layer. At first it looked like it was skipping steps, but after watching it the filament comes out during the circle (usually at the beginning of a new border) and while the extruder follows the curve, the filament doesn't and ends up as a straight line from the start to the point where it does finally stick to the next layer (see attached picture).

Naturally my first thought was z-offset calibration, but I've done that multiple times (latest SoliPrint on Mac) and the lines look good (though happy to post a shot of the calibration lines if anyone would like to see that).

A few other notes that might help:

* I printed a cube last night after these issues and it didn't seem to have these issues for squared off objects. New layers stuck just fine.

* I printed a larger circular item the other day and half the print was beautiful and then the extruder gear jammed so I cleared that jam and tried again and this is when the problem started. Today I finally realized that maybe I should clean the extruder gear, so I did that but the print was no better. 

Thanks in advance!

2 Reply by carl_m1968

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Re: Filament Sticking to Extruder on Circular Prints

Sounds like your temperature may be too low and you are not getting good layer bonding. Won't show on straight lines unless after the print you try top pull the layers apart. But on circles it will show.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

3 Reply by mikeflynn

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Re: Filament Sticking to Extruder on Circular Prints

Ok, that makes sense. I'm just using the stock settings with SoliPrint (Mac v1.3) for the bed (100) and extruder (230) any idea what I should try moving them up to?

4 Reply by carl_m1968

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Re: Filament Sticking to Extruder on Circular Prints

Leave the bed but raise the extruder to 235 and maybe even 240. It would also be a good idea to get a thermometer that can read high yemps like a cooking thermometer to confirm the reported temp is accurate. I have seen variations by as much as 30 degrees on some printers.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

5 Reply by mikeflynn

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Re: Filament Sticking to Extruder on Circular Prints

Thanks, will do. I think I have one lying around to test so I'll report back on results and if my temp is off for reference.

6 Reply by mikeflynn

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Re: Filament Sticking to Extruder on Circular Prints

Cranked it up to 240 in SoliPress (I haven't yet been able to test to see what it's really getting up to) and the results (below) are definitely better, but the problem is also definitely still occurring. Should I go higher than 240? To 250? ...or just hold at 240 until I get find a way to test the actual extruder temp?

http://soliforum.com/i/?eYwDXEC.jpg

7 Reply by carl_m1968 (edited by carl_m1968 2015-10-05 04:25:08)

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Re: Filament Sticking to Extruder on Circular Prints

mikeflynn wrote:

Cranked it up to 240 in SoliPress (I haven't yet been able to test to see what it's really getting up to) and the results (below) are definitely better, but the problem is also definitely still occurring. Should I go higher than 240? To 250? ...or just hold at 240 until I get find a way to test the actual extruder temp?

http://soliforum.com/i/?eYwDXEC.jpg


wait till you can find out the actual temp..

Also what speed are you printing at?

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

8 Reply by mikeflynn

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Re: Filament Sticking to Extruder on Circular Prints

30 mm/s on the perimeters.

9 Reply by carl_m1968

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Re: Filament Sticking to Extruder on Circular Prints

Have you tried reducing the speed by half. Could be a situation where the temp is too low for the speed you are pulling the filament.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

10 Reply by mikeflynn

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Re: Filament Sticking to Extruder on Circular Prints

30 mm/s is the SoliPrint default but I'll definitely modify the "Low Quality" profile and try that next.

11 Reply by mikeflynn

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Re: Filament Sticking to Extruder on Circular Prints

Finally got a chance to print again after being out of town and the it would seem that going more slowly (15 mm/s) did not seem to make much of a difference.

12 Reply by trayracing

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Re: Filament Sticking to Extruder on Circular Prints

I had something like that once where the root cause was the bed was a bit loose from the carriage, making layer height irregular, so some layers wouldn't bond. Snugging up the screws at the back of the bottom of the bed made that go away. (Not too tight though, or the carriage may bind on the rods, according to SD support.)

13 Reply by Skyblue (edited by Skyblue 2015-10-14 12:30:50)

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Re: Filament Sticking to Extruder on Circular Prints

I had a similar issue, found the set screws on the Y motor were very loose.  I tightened them, and fixed the issue where the perimeter does not quite meet infill.  Also check in Slic3r, under advanced, infill/perimeters overlap.  I changed the default from 15% to 15.5%, and this also helps.  I am not using Soliprint, however, using Repetier.