z offsets for different tools

Mike 1

Hello,
I use a E3D tool changer. Core xy, Duet 2 Wifi with extension board V3.45 and use more or less the config from E3D.

My offsets seam to have an issue. X and Y are working, but I do not see an effect on Z. Did something change in the code?

config(5).g

; G10 OFFSETS
G10 P0 X20.803 Y43.444 Z-5.07 ; Set tool 0 axis offsets
G10 P1 X-7.861 Y38.650 Z-5.71 ; Set tool 1 axis offsets
G10 P2 X20.615 Y43.681 Z-16.41 ; G10 P2 X20.615 Y43.681 Z-6.06 mehr Abstand z.b. von -1 nach -2 (Offset wird kleiner) ; Set tool 2 axis offsets
G10 P3 X-7.717 Y38.818 Z-5.61 ; Set tool 3 axis offsets

Thanks!

jay_s_uk

@MIke-1 you're setting a negative z offset but you can only go as low as Z0.
Best update your M208

M208 X-35:328.5 Y-49:245 Z0:300 C-45:360

Mike 1

@jay_s_uk

Unfortunately that did not help

M208 X-35:328.5 Y-49:245 Z-20:300 C-45:360

But it think it goes into the wrong direction because the nozzle is lower than the switch probe. Probing can only work without a tool.

jay_s_uk

@MIke-1 whats in your homez?

Mike 1

@jay_s_uk
This here after probing:

Tool T1

Tool T2

With
; G10 OFFSETS
G10 P0 X20.803 Y43.444 Z-5.07 ; Set tool 0 axis offsets
G10 P1 X-7.861 Y38.650 Z-5.71 ; Set tool 1 axis offsets
G10 P2 X20.615 Y43.681 Z-16.41 ; G10 P2 X20.615 Y43.681 Z-6.06 mehr Abstand z.b. von -1 nach -2 (Offset wird kleiner) ; Set tool 2 axis offsets
G10 P3 X-7.717 Y38.818 Z-5.61 ; Set tool 3 axis offsets

But I dont see this effect on the nozzle

jay_s_uk

@MIke-1 ok, whats in you tpre2.g and tpost2.g?

Mike 1

@jay_s_uk

Here are the files:

tpost2.g tfree2.g tpre2.g

jay_s_uk

@MIke-1 you aren't restoring the X/Y/Z position in tpost. see here https://github.com/Duet3D/RepRapFirmware/wiki/Changelog-RRF-3.x#:~:text=After changing tool,or similar commands.

Mike 1

@jay_s_uk

So I can just add

G60 S0
G1 R0 X0 Y0 Z0

after the brushing or rework brushing?

jay_s_uk

@MIke-1 yea

Mike 1

@jay_s_uk

It is not working. The first layer with the first extruder is fine. After the extruder change the layer is more or less on the same level, as they are on a similar hight. The second layer has a big offset to the first one with the second extruder because the offset in the config is unrelistic to high to check the functionality.
A Z move is needed in the gcode to get on the right level...

; tpost2.g
; called after tool 2 has been selected

;heatup
M116 P2
M116 H0 S5

;prime nozzle
;M98 P"prime.g"

M98 P"brush_right"

M106 R1 ; restore print cooling fan speed

;M593 F42.2 ; cancel ringing at 42.2Hz (https://forum.e3d-online.com/threads/accelerometer-and-resonance-measurements-of-the-motion-system.3445/)

G60 S0
G1 R0 X0 Y0 Z-5

;G91
;G1 Z-5 F1000
;G90

Mike 1

@MIke-1
This here at the very end fixted the issue!

G1 R2 Z2 F2000
G1 R2 Z0 F2000

Thanks to the Duet Team!