fusion 360 duet post prosessor z axis problem

Mostly Printed CNC - MPCNC Troubleshooting
1

Hi

I have just finished my mpcnc build where I am using the Duet wifi controller board.

I am modeling in fusion 360 where I also have done the cam. I have tied Guffy`s post prosessor and everything works fin except the z-axis moves correctly down and starts the first cutting layer but when it shall go down to start cutting the next layer the z-axis do not move but everything runs nice in x and y axis.

So if I try to cut a 3mm pocket in three steps of 1mm each it only moves down to top of stock and do the x and y pocketing three times, I do not get any error messages.

I hope there are some good brain`s here that can help me out.

best Petter

2

You are not using marlin so I am not sure if you need a different PP or not.

3

post your gcode

maybe it has soft limits. Assuming the top of your stock is zero, so when it calls to go below the top of the stock the controller just says no. that should throw an error but stranger things have happened.

4

Hi

Yes, it might be soft limits. my setting in config.g is

; Axis Limits
M208 X0 Y0 Z0 S1 ; set axis minima
M208 X450 Y450 Z80 S0 ; set axis maxima

so maybe if I change Z0 to a negative number it would go below the stock after homing.

I will test it.

Tank you Tim for your answer.

best

Petter