I have a problem in universal g-code sander(UGS)
When I click x+, y+ or x-,y-
my stepper move diagonal
when I press diagonal buttons, it moves horizontal or vertical help me how to fix
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You need to provide more documentation, a lot more, to get precise replies and not tons of wild guesses.
Some help: How to get the best out of this forum - Using Arduino / IDE 1.x - Arduino Forum
what commands are send while this?
because of your cinematic you should set proper command to that quick buttons.
i prefer "grbl plotter"
I suggest that you check that your GRBL is working properly first by sending it simple G0, G1 commands from the serial monitor (GRBL wiki should show how). If it is working right, the problem is in the UGS configuration and I suggest you ask over on Help - UGS
Is that a CoreXY setup? Look in the Grbl config.h file. There is a setting to configure for CoreXY.
Look for "Enable CoreXY kinematics". It is at line 145 in my installation of Grbl.