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My Prusa MINI can't print small polygons  

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Ondřej Pražák
(@ondrej-prazak)
Member
My Prusa MINI can't print small polygons

My Prusa MINI can't print small polygons. I printed this box, and instead of small hexagons, the printer printed circles. I've tried adjusting the belt tension and slowing down the print speed, but the result is still the same. Does anyone know where the problem might be?

Posted : 26/03/2024 8:03 am
Diem
 Diem
(@diem)
Illustrious Member

As the filament turns a corner it drags some of the previously laid strand with it rounding the angle.  All FDM curves distort slightly to the concave.

Calibrate your hole to a slight star shape and you should be able to acheive the desired result.

Cheerio,

Posted : 26/03/2024 10:11 am
str0gg
(@str0gg)
Eminent Member
RE: My Prusa MINI can't print small polygons

Your printer need to be straight in x,y,z and from picture I can tell you its not. Its paint with this printer...

mini+ [bondtech dual drive, revo, reprinted with PA11-CF and ASA] lives in photo tent.
mk4 stock (with some parts reprinted) lives in prusa enclosure.

Posted : 26/03/2024 2:26 pm
Ondřej Pražák
(@ondrej-prazak)
Member
Topic starter answered:
RE:

Yes, that could help, but other FDM printers will print this model even without such adjustments. But thank you for the advice.

Posted by: @diem

As the filament turns a corner it drags some of the previously laid strand with it rounding the angle.  All FDM curves distort slightly to the concave.

Calibrate your hole to a slight star shape and you should be able to acheive the desired result.

Cheerio,

 

This post was modified 1 month ago by Ondřej Pražák
Posted : 26/03/2024 5:40 pm
Ondřej Pražák
(@ondrej-prazak)
Member
Topic starter answered:
RE: My Prusa MINI can't print small polygons

I've aligned the printer to nearly perfect position, but the problem still persists. I've even tried lowering the printing temperature or adjusting the Z axis, but still nothing. Thank you for the advice

Posted by: @str0gg

Your printer need to be straight in x,y,z and from picture I can tell you its not. Its paint with this printer...

 

Posted : 26/03/2024 5:43 pm
str0gg
(@str0gg)
Eminent Member
RE: My Prusa MINI can't print small polygons

Does it print round objects correctly?
If yes please do this calibration cube and lets start from it https://www.printables.com/model/69934

mini+ [bondtech dual drive, revo, reprinted with PA11-CF and ASA] lives in photo tent.
mk4 stock (with some parts reprinted) lives in prusa enclosure.

Posted : 27/03/2024 10:25 pm
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