Cuts are not as designed

Aldenflorio
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25 Sep 2020 03:58 #183670 by Aldenflorio

Cuts are not as designed was created by Aldenflorio

I’m still fine tuning my newly “finished” plasma. So I’ve only really been cutting lines and basic shapes. My machine seems to have problems with circles though, they don’t match up and there’s just some weird lines going on. But it cuts squares perfect, it’s square, and it scaling is perfect. Could the issue be the design software? I’m using librecad, then dxf2gcode

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thefabricator03
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25 Sep 2020 04:35 #183679 by thefabricator03

Replied by thefabricator03 on topic Cuts are not as designed

What kind of drive system does your machine use? Direct drive steppers?

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Aldenflorio
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25 Sep 2020 04:58 #183681 by Aldenflorio

Replied by Aldenflorio on topic Cuts are not as designed

Direct drive with stepper motors is correct

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thefabricator03
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25 Sep 2020 05:01 #183682 by thefabricator03

Replied by thefabricator03 on topic Cuts are not as designed

Have a look at this thread, forum.linuxcnc.org/plasma-laser/38777-ap...-step-errors?start=0

Particularly the post by tommylight.

The following user(s) said Thank You: tommylight

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tommylight
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25 Sep 2020 08:25 #183692 by tommylight

Replied by tommylight on topic Cuts are not as designed

Pictures ?

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Aldenflorio
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25 Sep 2020 12:47 #183713 by Aldenflorio

Replied by Aldenflorio on topic Cuts are not as designed

imgur.com/a/iRPK6k3

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tommylight
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25 Sep 2020 13:25 #183714 by tommylight

Replied by tommylight on topic Cuts are not as designed

One of the axis has backlash of about 1mm.
And please upload the pictures here, not on external sites.

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Aldenflorio
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25 Sep 2020 13:28 #183715 by Aldenflorio

Replied by Aldenflorio on topic Cuts are not as designed

How do I find out which axis and how do I fix that?

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tommylight
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25 Sep 2020 13:30 #183717 by tommylight

Replied by tommylight on topic Cuts are not as designed

while the machine is powered on and the motors are locked, move each axis by hand, they should not move. Also check the pulleys as one of them might be loose.

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Aldenflorio
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25 Sep 2020 13:45 #183719 by Aldenflorio

Replied by Aldenflorio on topic Cuts are not as designed

It’s direct drive, so I have a gear rack and gears. I’ll check in a few hours. How would I fix that?

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Cuts are not as designed

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