How do I get rid of the pimples on my prints?
Posted by tosjduenfs
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How do I get rid of the pimples on my prints? November 27, 2012 08:21PM |
Registered: 11 years ago Posts: 24 |
Sometimes I get more sometimes I get less but I always end up with these bumps on the surface of my prints at the end of perimeters. If not for these bumps my prints would turn out great. I'm printing on a prusa mendel, with J-Head MK IV-B hotend, and ultimachine PLA. I'm printing perimeters at 50mm/s, 1.5mm retraction @ 20mm/s. Any ideas?
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Re: How do I get rid of the pimples on my prints? November 27, 2012 08:33PM |
Registered: 13 years ago Posts: 1,797 |
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Re: How do I get rid of the pimples on my prints? November 27, 2012 10:32PM |
Registered: 11 years ago Posts: 24 |
I'm currently using 0.7.2b since the current version ignores my solidfill layer number and perimeter number parameters. This version does not have that option. Also I've found the blobbing to be worse in the newest version.
Also, wouldn't that just cause them all to be on the same line? I'd still have the bumps wouldn't I?
Also, wouldn't that just cause them all to be on the same line? I'd still have the bumps wouldn't I?
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Re: How do I get rid of the pimples on my prints? November 27, 2012 10:41PM |
Registered: 12 years ago Posts: 8 |
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Re: How do I get rid of the pimples on my prints? November 27, 2012 11:11PM |
Registered: 12 years ago Posts: 482 |
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Re: How do I get rid of the pimples on my prints? November 28, 2012 08:52AM |
Registered: 13 years ago Posts: 147 |
If your extrusion is calibrated leave it alone, there should only be a 'fudge' (Swell) factor for ABS.
Your retraction is very long, aim anywhere below 1mm and as fast as your extruder reliably allows. If your retraction needs to be that long to prevent ooze, then you are probably running your extruder marginally too hot.
Your retraction is very long, aim anywhere below 1mm and as fast as your extruder reliably allows. If your retraction needs to be that long to prevent ooze, then you are probably running your extruder marginally too hot.
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Re: How do I get rid of the pimples on my prints? November 28, 2012 01:54PM |
Registered: 11 years ago Posts: 24 |
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Re: How do I get rid of the pimples on my prints? November 29, 2012 03:58AM |
Registered: 14 years ago Posts: 689 |
Nice print! Increasing z speed and acceleration can also help. I got terrible blobbing like that on my first printer because I had to run the z very slow due to binding.
--
-Nudel
Blog with RepRap Comic
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-Nudel
Blog with RepRap Comic
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Re: How do I get rid of the pimples on my prints? November 29, 2012 09:28AM |
Registered: 12 years ago Posts: 34 |
I think I got the same problem, please let us know if suggestions works. I will try to reduce retraction as well.
http://www.3byazici.com/2012/11/3d-printer-ile-master-yoda.html
[www.3byazici.com]
[3dprintertr.com]
http://www.3byazici.com/2012/11/3d-printer-ile-master-yoda.html
[www.3byazici.com]
[3dprintertr.com]
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Re: How do I get rid of the pimples on my prints? November 30, 2012 04:33AM |
Registered: 11 years ago Posts: 46 |
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Re: How do I get rid of the pimples on my prints? December 05, 2012 04:43AM |
Registered: 11 years ago Posts: 46 |
Update: I've disabled random start point, disabled "additional perimeters" and selected to do only one perimeter. Its looking much better.
The pimples have gone completely away after I reduced the layer height from 0.4 to 0.2. The only thing left are blobs whenever he needs to travel. I guess its due to oozing.
I can even enhance everything by doing faster travels. I can only guess but it feels like there is to much pressure on the filament. Maybe its to springy due to the head, therefore the retract isn't as effective as it should be.
Perimeters: 120mm/s
Infill: 150mm/s
Travel: 200mm/s
Retract 1.25mm @ 15 mm/s
Temp: 185 °C PLA
Edited 2 time(s). Last edit at 12/05/2012 06:08PM by DerKulturfolger.
The pimples have gone completely away after I reduced the layer height from 0.4 to 0.2. The only thing left are blobs whenever he needs to travel. I guess its due to oozing.
I can even enhance everything by doing faster travels. I can only guess but it feels like there is to much pressure on the filament. Maybe its to springy due to the head, therefore the retract isn't as effective as it should be.
Perimeters: 120mm/s
Infill: 150mm/s
Travel: 200mm/s
Retract 1.25mm @ 15 mm/s
Temp: 185 °C PLA
Edited 2 time(s). Last edit at 12/05/2012 06:08PM by DerKulturfolger.
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Re: How do I get rid of the pimples on my prints? December 08, 2012 06:02AM |
Registered: 11 years ago Posts: 46 |
Hi,
I am now doing 1.25 retract at 50mm/s and its really looking great. Another thing creating a better looking print was to use locking nuts to fasten the springs of the printbed. Those nuts kept undwinding themself leading to an unleveled printbed while printing.
Maybe you could give me/us an update on your progress?
Ingo
I am now doing 1.25 retract at 50mm/s and its really looking great. Another thing creating a better looking print was to use locking nuts to fasten the springs of the printbed. Those nuts kept undwinding themself leading to an unleveled printbed while printing.
Maybe you could give me/us an update on your progress?
Ingo
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Re: How do I get rid of the pimples on my prints? December 09, 2012 05:55PM |
Registered: 11 years ago Posts: 24 |
Been working a lot lately and haven't had too much time to play. I've been trying to slowly increase my retraction speed and it has been helping. I find I get fewer pimples when I use slic3r 0.7.2b rather than the newer versions, but I wish I could take advantage of some of the newer features. I still have not found a good calibration piece for this. I'll just start making parts and experimenting.
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Re: How do I get rid of the pimples on my prints? December 10, 2012 12:55AM |
Registered: 12 years ago Posts: 539 |
Slic3r 9.7 is causing pimples and spikes: [github.com]
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Re: How do I get rid of the pimples on my prints? December 10, 2012 09:58PM |
Registered: 12 years ago Posts: 198 |
Idolcrasher Wrote:
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> Slic3r 9.7 is causing pimples and spikes:
> [github.com]
Thanks for the Update!
I had thought 9.7 had fixed everything. But this week it has been doing psycho jobs on some of my .stl files. to the point I've been screening the gcode through the pronterface viewer before I commit the print.
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> Slic3r 9.7 is causing pimples and spikes:
> [github.com]
Thanks for the Update!
I had thought 9.7 had fixed everything. But this week it has been doing psycho jobs on some of my .stl files. to the point I've been screening the gcode through the pronterface viewer before I commit the print.
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Re: How do I get rid of the pimples on my prints? December 10, 2012 10:14PM |
Registered: 13 years ago Posts: 2,947 |
I suggest trying Kisslicer as it produces much nicer Gcode then Slic3r and has a feature called wipe that stops almost all bumps and strings. Just be sure to have your retract as short and fast as possible.
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Re: How do I get rid of the pimples on my prints? December 19, 2012 03:44AM |
Registered: 12 years ago Posts: 34 |
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