2 Z motors, to endstops

aidar

Ok, config seems to be ok. So what exactly happens if you send G28 from DWC gcode console? If nothing moves, there should be some response message from duet why nothing moves. What that message says?

Torro

Just started a print...

yesterday, there was no message from DWC.
A click on "home all" did nothing, but i couldn´t move the motors by hand anymore.

will test G28 asap

Torro

after powering up the printer, a single G28 without any parameter does nothing. the circle in the "send" button spins and spins and spins. when i click "emergency stop", a message "homing failed" appears.

then i homed only Z. works. after that, G28 works without any issue, same as the button "homeall"

aidar

That is odd. You are not supposed to be able home Z at all before X and Y are not homed. What firmware version are you using and what version of DWC?

Torro

Duet Web Control 2.0.0-RC3

Electronics: Duet WiFi 1.02 or later
Firmware: RepRapFirmware for Duet 2 WiFi/Ethernet 2.02(RTOS) (2018-12-24b1)
Duet WiFi Server Version: 1.22

Phaedrux

@torro said in 2 Z motors, to endstops:

homeall
G91 ; relative positioning
G1 S1 X-300 Y-300 F5000 ; move quickly to X or Y endstop and stop there (first pass)
G1 S1 X-300
G1 S1 Y-300
G1 X10 Y10 F6000 ; go back a few mm
G1 S1 X-20 F360 ; move slowly to X axis endstop once more (second pass)
G1 S1 Y-20 ; then move slowly to Y axis endstop
M98 Phomez.g

Try changing M98 Phomez.g to G28 Z

Torro

Ok. I will try.

Torro

I didn't test it yet, but i have an idea, i could put the home Z order on top in the first line. I Guess it works...

thwe

On my CoreXY also with 2 Z-Motors and 2 Endstops (1 for Z and 1 for U - Drive 2 and 3) i have to home Z also at first.

Only for example - without any garanty - see my homeall.g:

; ##############  homeall.g -> called to home all axes  ##############

M98 Phomez.g                 ; X homing

M98 Phomex.g                 ; Y homing

M98 Phomey.g                 ; Z homing

G90


; #################    checking trigger height + Z null adjusting    #################
G1 X144 Y150 F12000
G1 Z20 F1800
G1 Z15 F1200
G1 Z10 F600
T0
G30                            ; Probe the bed at the current XY position, set the Z coordinate to the probe trigger height
G4 P200
G1 Z50 F1800

; END OF FILE

and my homez.g:

; ##############  homez.g -> called to home the Z axis  ##############

G91                         ; relative positioning

M584 Z2 U3 P4               ; Split Z into 2 (Z+U)

G1 S1 Z999 U999 F600        ; Move the bed down in the Z direction. S1 to stop if endstop is triggered
G1 S2 Z-3 U-3 F600          ; Move the bed up 3mm in the -Z direction, ignore if axis are not homed
G1 S1 Z9 U9 F200            ; Move slowly in the +Z direction again to stop exactly at the homing switch
M400                        ; Wait for current moves to finish

G4 P100
G1 S2 Z0.00 U0.00 F200      ; Compensation the limit switch from z-axis drive 2 (!!can be adjusted here!!)
G4 P100

M584 Z2:3 P3                ; Join U to Z again
G4 P100

G92 Z282.00                 ; set position of Z relativ to the bed (!!must be adjusted here!!)

G90                         ; Back to absolute mode

G1 S2 Z270 F900
; End of file

Torro

Good to know. Thanks!

Torro

@phaedrux said in 2 Z motors, to endstops:

@torro said in 2 Z motors, to endstops:

homeall
G91 ; relative positioning
G1 S1 X-300 Y-300 F5000 ; move quickly to X or Y endstop and stop there (first pass)
G1 S1 X-300
G1 S1 Y-300
G1 X10 Y10 F6000 ; go back a few mm
G1 S1 X-20 F360 ; move slowly to X axis endstop once more (second pass)
G1 S1 Y-20 ; then move slowly to Y axis endstop
M98 Phomez.g

Try changing M98 Phomez.g to G28 Z

Same behaviour. I just put the m98 phomez. G in the first line of homeall.g

Now it works as expected