1. LinuxCNC
  3. General LinuxCNC Questions
  5. Why the circle drawed by "G2 X390 Y-280 I5 J0" not round?

Why the circle drawed by "G2 X390 Y-280 I5 J0" not round?

More
14 Oct 2021 05:41 #223057 by curran209
Why the circle drawed by "G2 X390 Y-280 I5 J0" not round? was created by curran209
We use laser to draw circle on a aluminum sheet. Trajectory planning is round, but the circle drawed is not round.
Why the circle drawed by "G2 X390 Y-280 I5 J0" not round?
Attachments:

Please Log in or Create an account to join the conversation.

  • tommylight
  • tommylight's Avatar
  • Away
  • Moderator
  • Moderator
More
14 Oct 2021 11:53 #223077 by tommylight
Replied by tommylight on topic Why the circle drawed by "G2 X390 Y-280 I5 J0" not round?
Very low acceleration or mechanical issues.

Please Log in or Create an account to join the conversation.

More
14 Oct 2021 12:16 #223080 by RNJFAB
Replied by RNJFAB on topic Why the circle drawed by "G2 X390 Y-280 I5 J0" not round?
x & y axis not square

Please Log in or Create an account to join the conversation.

More
14 Oct 2021 16:01 #223094 by andypugh
Replied by andypugh on topic Why the circle drawed by "G2 X390 Y-280 I5 J0" not round?
This could be simple geometry. Is the laser controlled by a galvanometer or is it moving on a cartesian axis?

If it is a galvanometer then the only place that a circle will be circular is exactly under the centre of the galvanometer.

This can presumably be corrected by a kinematics module.

Please Log in or Create an account to join the conversation.

More
15 Oct 2021 01:18 #223145 by curran209
Replied by curran209 on topic Why the circle drawed by "G2 X390 Y-280 I5 J0" not round?
The laser binded on the Z axis. Laser is on all the time. Draw this circle by moving the X and Y axis of servo motor.

Please Log in or Create an account to join the conversation.

More
15 Oct 2021 03:35 #223159 by curran209
Replied by curran209 on topic Why the circle drawed by "G2 X390 Y-280 I5 J0" not round?
@tommylignt I increased acceleration, but it didn't to be good.
Excluded mechanical issues, because another CNC has not this issue.

@RNJFAB x & y axis is square

Please Log in or Create an account to join the conversation.

More
15 Oct 2021 07:26 #223175 by andypugh
Replied by andypugh on topic Why the circle drawed by "G2 X390 Y-280 I5 J0" not round?
Can you use Halscope to plot the X and Y following errors?

Please Log in or Create an account to join the conversation.

More
18 Oct 2021 08:45 #223440 by curran209
Replied by curran209 on topic Why the circle drawed by "G2 X390 Y-280 I5 J0" not round?
sorry, can you tell me how to download Halscope and use it?

Please Log in or Create an account to join the conversation.

More
18 Oct 2021 12:12 #223448 by andypugh
Replied by andypugh on topic Why the circle drawed by "G2 X390 Y-280 I5 J0" not round?
It's part of LinuxCNC.

linuxcnc.org/docs/2.8/html/hal/tutorial....ec:tutorial-halscope

Most GUIs can open it from the menu, or you can open it from the command line as described above.

Please Log in or Create an account to join the conversation.

More
19 Oct 2021 08:58 #223536 by curran209
Replied by curran209 on topic Why the circle drawed by "G2 X390 Y-280 I5 J0" not round?
what is  the variable name of x axis and y axis following errors in halscope?
which is the selection of x axis and y axis following errors  in in pin, signal, param?
Attachments:

Please Log in or Create an account to join the conversation.

  1. LinuxCNC
  3. General LinuxCNC Questions
  5. Why the circle drawed by "G2 X390 Y-280 I5 J0" not round?
Time to create page: 0.144 seconds
Powered by Kunena Forum