Z no longer homes - goes up l

Mostly Printed CNC - MPCNC Troubleshooting
1

I was using the fnc just fine yesterday. After the project was completed. I loaded up another file and when i started the print, the Z went up instead of down andnthen started doing the job as if it was homed. It was anout an inch over the work piece.

I loaded the file i has just succesfully completed and it did the same thing. I checked the wires(good) i ran m119 and checked all my endstops amd they were working as they should.

I reset the laptop and turned the board off/on. Still no luck.

Im running repterier host using Estlcam to create my gcode.

2

You will need to post the first 50 lines or so of your gcode. 99.9% chance of a starting gcode error.

3

This is my starting code in ESTLCAM

;Project
;Created by Estlcam version build
;Machining time about hours
G91 ; Relative positioning, just in case
G92 X0 Y0 Z0 ; Set Current position to 0, all axes
G00 Z5.0000 F500 ; Raise Z 5mm at 8.3mm/s to clear clamps and screws
G28 Z ; Home zprobe
G92 Z18.2 ; Account for probe thickness (set your thickness)
@isathome
G00 Z5.000 F500 ; Raise Z probe off of surface	
@pause
M03 S24000 ; PID, set spindle speed
G90 ; Absolute positioning, just in case
G00 X0.0000 Y0.0000 Z15.0000 F480
G00 X15.2400 Y33.1684 F2100
G00 Z0.5000 F480
G01 Z0.0000 F180 S24000
G01 Z-1.0000 F180

It’s been working fine up until today.

4

I think these only work in some sort of program, we use the code from the milling basics page when using an LCD. Those will not work with a LCD.

1 Like
5

Im using repetier host on a laptop, no LCD

6

Hmm. I am actually not sure then. I have never done a tool change that way. Did you do any updates to repetier?

What board and firmware?