A rounded corner instead of a sharp corner

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03 Apr 2024 05:41 #297487 by Topi69
Hi everyone,

I found mistake in my cnc software running. 
It  make rounded corner instead of all  a sharp corner. (see pic below)

I ran the milling of the "LinuxCNC" text dry
It is interesting that if I increase the size of the text with the parameter, the rounding also increases.

What I wrong?

Please help me!
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03 Apr 2024 06:05 - 03 Apr 2024 06:06 #297488 by pommen
To me it looks like you need to tweak G64 setting.
Have a look at forum.linuxcnc.org/20-g-code/44022-understanding-g64-behavior
Last edit: 03 Apr 2024 06:06 by pommen. Reason: Spelling
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03 Apr 2024 08:52 #297493 by andypugh
Also: linuxcnc.org/docs/stable/html/user/user-concepts.html

However... If it is trajectry control I wouldn't expect the rounding to scale with the text size, unless the accelleration settings of the machine are so low that it can't get up to speed in the straight portions of the letters.

How carefully did you tune your machine accelleration settings?
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04 Apr 2024 09:26 #297566 by Topi69
Hi everyone,

with the G62 P0,01 command the problem is solved. 

(the before - after pics see below)

Thanks for everyone!

   
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04 Apr 2024 09:36 #297569 by Topi69
My acceleration is little bit slowly, because the steppers is big (8,7Nm), but the machine run without gear transmissions.

for example:

Speed = 33 mm/s (2 m/min)
Acc. = 50 mm/s2
It reach max. speed = 0,66 sec / 10.89 mm

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