Duet 2 Wifi Axes homed issue

kenbigt

Hi All recently upgraded my Anycubic Predator to a Duet 2 Wifi board and 7" screen haveing a problem sometimes one of the axes are not homing and I get an error message insufficient axes homed all I need to do is click on home again or just on the axis and it homes and everything ok wondering is anyone can advise on this issue.

Many Thanks

DocTrucker

@kenbigt we'll need to see your homing files. I suspect the distance you drive towards the limits is less than the maximum travel on the axis?

kenbigt

@DocTrucker Hi can you tell me where they are and i will post them thanks

kenbigt

; homedelta.g
; called to home all towers on a delta printer
;
; generated by RepRapFirmware Configuration Tool v2 on Tue Feb 26 2019 21:31:01 GMT+0000 (Greenwich Mean Time)
G91 ; relative positioning

G1 S1 X470 Y470 Z470 F1800 ; move all towers to the high end stopping at the endstops (first pass)
G1 X-5 Y-5 Z-5 F1800 S2 ; go down a few mm
G1 S1 X10 Y10 Z10 F360 ; move all towers up once more (second pass)
G1 Z-5 F6000 ; move down a few mm so that the nozzle can be centred
G90 ; absolute positioning
;G1 X0 Y0 F6000 ; move X+Y to the centre

; Example Homing file for RepRapFirmware on delta printer

;M117 Use https://configurator.reprapfirmware.org/ to set up your printer config

;G91 ; use relative positioning
;******* Change F250 in the following line to F2500 when you are finished commissioning
;******* Change 320 in the following to a higher value if your Kossel has taller towers
;G1 S1 X320 Y320 Z320 F2500 ; move all carriages up 320mm, stopping at the endstops
;G1 S2 X-3 Y-3 Z-3 ; move all carriages down 3mm
;G1 S1 X6 Y6 Z6 F250 ; move carriages slowly up 6mm, stopping at the endstops
;G1 Z-5 F2000 ; down a few mm so that we can centre the head
;G90 ; back to absolute positioning
;G1 X0 Y0 F2000 ; centre the head and set a reasonable feed rate

droftarts

Looking at the specification, the build area is 370mm(D) x 455mm(H). If the effector is close to the bed, and off to the side, it could easily be that one of the carriages will be more than the 470mm (which is the homing distance that is set by the second line of the script: G1 S1 X470 Y470 Z470 F1800 ) from the endstop. Increase the 470 on each axis. It's not really going to matter if you set it to 1000mm, as it will stop at the endstop! eg:

G1 S1 X1000 Y1000 Z1000 F1800 ; move all towers to the high end stopping at the endstops (first pass)

If you want it accurate, move the nozzle down to the bed, then over to the edge, and then measure from the lowest carriage to the endstop.

Ian

kenbigt

Brilliant thanks very much I have setup the config as you have suggested and going to see how it goes