Axis deflecting while jogging in G54

Hello everyone,

I’m experiencing some odd behavior when jogging in the G54 coordinate system. When I jog from X0 Y0 to X100 Y0, the Y-axis deflects slightly, as if a small rotation or compensation is being applied. The final reported position is X100 Y0.084. The Z-axis is not affected. A similar issue occurs in the opposite direction: when I jog along the Y-axis, the X-axis also deflects. However, if I issue an MDI command to move to X100, the Y-axis remains unchanged, which is the expected behavior. When I switch to G55 or G56, everything works as intended—there is no coupling or linkage between the X and Y axes. I’ve attached a screenshot showing the issue: first I moved from X0 to X100 using an MDI command, then manually jogged back. You can clearly see the Y-axis deflection during the jog. I have already cleared all work coordinate systems, but the problem persists specifically with G54.

Any help would be greatly appreciated.
Greetings,
Sandro

 

In MDI:  (debug,#5230)  to see if there is a rotation around Z. To reset   G10 L2 P1 R0

Thank you very much MaHa!

This worked. Initially with (debug,#5230) I got -0.012195. After G10 L2 P1 R0 it was reset to 0. Perfect. So there was a rotation active? Maybe a leftover from when I probed rotation of a workpiece?

It would probably be a good idea to add MaHa's G10 solution to your startup code..

Good point Rod, I will do so.

does your offset table show the offset for rotation column? if not you can set it to do so in the ini file by specifying the column axis as shown below:

 
 

If I remember correctly, I've checked this back then and the the column R showed 0.0000 for G54 and other offsets. Clearing and saving the offsets did not help. Only G10 L2 P1 R0 resolved the issue. But since then, everything works fine. I will let you know, in case it happens again.