A Z motor does not rotate ONLY when homeall

peirof

Hi,

As I mentioned, I have had a problem recently, in which one of the Z motors (of the 3 used by the printer) does not turn... After exploring several possibilities, I have isolated the problem a little more.

-Engine runs, i have connected to other driver
-Duet Driver works, I explain it below
-When I command in gcode (M564 H0), to be able to move without homing, the motor rotates....

When not spinning:

When i homing

I enclose the content of my homing, in case it was something that was not right, but notice this same file, it has worked until the day before yesterday.

homeall.g

G91 ; relative mode
G1 H1 Z30 F1000

; BLTouch
M280 P0 S160           ; Precautionary alarm release
M280 P0 S90            ; Ensure the pin is raised


G91 ; relative mode
G1 H1 X-500 Y500 F2000 ; coarse home X or Y
G1 H1 X-300 ; coarse home X
G1 H1 Y300 ; coarse home Y
G1 X4 Y-4 F600 ; move away from the endstops
G1 H1 X-10 ; fine home X
G1 H1 Y10 ; fine home Y
G90                     ; absolute positioning


G1 X0 Y0 F2000 ; go to first probe point
G30                 ; home Z by probing the bed

G91                    ; relative positioning
G1 Z5 F100             ; lift Z relative to current position
G90                    ; absolute positioning

I go try downgrade to stable version....

Ideas welcome...

I use these Firmware:

Board: Duet 3 Mini 5+ (Mini5plus)
Firmware: RepRapFirmware for Duet 3 Mini 5+ 3.4.0rc1+1 (2022-02-10)
Duet WiFi Server Version: 1.26

peirof

One more thing....

At the start of my homing.g, there are there 2 lines

G91 ; relative mode
G1 H1 Z30 F1000
...

These Z30 moves, the not spining motor, DO it....

fcwilt

@peirof

The command G1 H1 Z30 F1000 suggests you have a Z axis endstop.

Do you have a Z endstop?

If you are just trying to insure the probe is clear of the bed, for homing X and Y, you should use a H2 parameter which doesn't expect an endstop.

You generally want to avoid using the M280 command to raise the pin. The M401/M402 commands allow the firmware to keep track of the state of the pin. The M280 might put things out of sync.

Frederick

peirof

@fcwilt I use those lines, at the beginning of the Homeall, to separate the bed from the Hotend and that the BlTouch can be deployed without problems, since it happened to me in some test, that the bed was very close to the nozzle, and when I hit Home, no the BlTOuch was displayed correctly

peirof

@peirof more news... I have downgraded... from version 3.4 beta, to 3.3. final. And when I pressed home, it tells me that Driver 2 has detected a "short to ground", with the previous firmware it didn't give me any errors

dc42

@peirof I think some of the 3.4beta versions did not report short-to-ground errors other than in M122; but 3.4RC2 should.

peirof

@dc42 wow.... on this occasion, it would have been of great help... that "short to ground" track has made me suspect the wiring, as it seems that it was....