I’m almost complete with my build (ramps+marlin 2.0 + dual endstops) and trying to draw the picture as described here https://www.v1engineering.com/estlcam-basics/
I connected mpcnc to repetier-host and make following steps:
- home x
- home y
- move the pen to start point
- reset coordinates by send G92 X0 Y0 Z0
- start Print gcode
May be the firmwere of the mpcnc has disabled arc support?