If the DRO's all goes zero the left joystick acts as the POV buttons (left 4 buttons) as if you have pressed SL+PW - the mode button on my Logitech Dual Action JoyPad shift the functions between POV (PW, PN, PE and PS) buttons and the left joystick.
Tip: To see which buttons is pressed in Mach3, select the "All buttons script" assignment in JoyPadSetup program, delete or move the macro "M800.m1s" and restart Mach3. When button or combination of buttons is pressed on the gamepad the "Status" DRO will display the button combination.
Ex. "JoyPad plugin -> STOP, Shift: SL, Button: PW". This text is displayed when safety left (SL) and POV west (PW) is pressed on the gamepad.
Hope this helps.
- Joakim