Homing issue on Duet2

droftarts

@Hubert91 I added an extra part to the end of my post. The last Z move also needs to be an H2 move in homex.g and homey.g, to move the Z axis back down.

Ian

Hubert91

@droftarts It's done and does not solve the problem

droftarts

@Hubert91 Please post your current homex.g and homey.g

Ian

Hubert91

@droftarts the homeall.g does not work too.

homex.g

; increase Z
G91 ; relative positioning
G1 H2 Z5 ; move Z relative to current position to avoid dragging nozzle over the bed
G90 ; absolute positioning

; home X
var maxTravel = move.axes[0].max - move.axes[0].min + 5 ; calculate how far X can travel plus 5mm
G1 H1 X{-var.maxTravel} F3000 ; coarse home in the -X direction
G1 X5 F6000 ; move back 5mm
G1 H1 X{-var.maxTravel} F300 ; fine home in the -X direction

; decrease Z again
G91 ; relative positioning
G1 H2 Z-5 F6000 ; move Z relative to current position
G90 ; absolute positioning

homey.g

; increase Z
G91 ; relative positioning
G1 H2 Z5 ; move Z relative to current position to avoid dragging nozzle over the bed
G90 ; absolute positioning

; home Y
var maxTravel = move.axes[1].max - move.axes[1].min + 5 ; calculate how far Y can travel plus 5mm
G1 H1 Y{-var.maxTravel} F3000 ; coarse home in the -Y direction
G1 Y5 F6000 ; move back 5mm
G1 H1 Y{-var.maxTravel} F300 ; fine home in the -Y direction

; decrease Z again
G91 ; relative positioning
G1 H2 Z-5 F6000 ; move Z relative to current position
G90 ; absolute positioning

droftarts

@Hubert91 I can't see anything wrong with your homex.g and homey.g. What doesn't work, or what error is reported?

Same for homeall.g; what doesn't work, or what error is reported?

Ian

Hubert91

There is no error reported with homeall.g, and no error reported with homex,y,z since I add the "H2".
When I send G28, the printer begin the homing by moving the X axis twice, then the Y axis twice, then Z axis twice, as written in the GCode. The endstop switches work well. But after the procedure, the printer remains not homed. The X, Y and Z buttons in the console of DWC remain orange.

If I try to force the homing by setting the known position with a G92 code, the buttons move to blue color. If I move the axis after that, the printer is de-homed again.

jay_s_uk

@Hubert91 said in Homing issue on Duet2:

M906 I0 ; set motor current idle factor

this is your problem in config.g remove that line

droftarts

@Hubert91 @jay_s_uk is right; effectively the motors are turning off, and so losing position, 1 second after they are set to idle, because of these two lines:

; Motor Idle Current Reduction
M906 I0 ; set motor current idle factor
M84 S1 ; set motor current idle timeout

You need to set some motor current, so the axis can maintain position. The default is usually 30%, ie M906 I30. You also don't want to set the idle timeout too short, in case there is a pause in your gcode program. M84 S30 is generally sensible.

Ian

Hubert91

Thank you guys, you find the error. With more than 0%, it works. Works with 1 seconde time out but I will set as you describe.

Have a good day

droftarts

@Hubert91 Actually, the M906 idle current doesn't come into effect until the whole machine is idle, ie it doesn't happen in the middle of a print job, only after the print job is finished, or a macro (like homing) has finished. So the M84 time is not too important. I have mine set to 20 seconds, but M906 set to 30%.

Ian