Hi,
I am having the same problem with y homing. Whenever i homed y axis ,it sets y value to -ve ymax value(ytm) and its gets double after very homimg .
I have upgraded its firmware(440.20) today and found this problem immediately. I have changed Y1 is M2 and Y2 is M3”, change to “Y1 is M3 and Y2 is M2” with reversing the $2po and $3po polarity settings.
I am using coolterm to send gcode file.
Kindly let me know is there any solution to solve it. Thank you in advance.