Is there a way to compensate bed heights after a calibration?


By sLpFhaWK 13 February 2017 22:10

Member · 38 comments

For whatever reason the front of my Kossel *Front when looking at it" the bed seems to be lower than the rear. Now I don't know why the auto calibration doesn't fix this and after adjusting my 1st layer height a ton of times  one side will be to low and the other will be perfect.

When I do a read out of M666 this is what I get.

Endstop adjustments X0.05 Y1.02 Z-1.07, tilt X0.00% Y0.00%

now I don't know why X is 1mm out of proportion than y and z is -1 than the rest but I thought that shouldn't matter with the G32?

Is there any way I can compensate my Y tower portion of my bed to get better adhesion there? for the parts I'm printing it is pretty important I get a solid 1st layer because they're for my Etsy page and they need to accept 608 bearing, so the hole needs to be pretty accurate.

I don't know if this will make any difference, but here is my bed.g

The printer is a Kossel vslot 250 bse from Ultibots.

; Auto calibration routine for delta printers
; Before running this, you should have set up your zprobe Z offset to suit your build, in the G31 command in config.g.

; About the G30 S parameter
; Used to specify what calibration computation to perform.
; S=-1 Don't adjust anything, just print the height error at each probe point
; S=0 Equivalent to S=
; S=3 Adjust homing switch corrections only
; S=4 Adjust homing switch corrections and delta radius
; S=6 Adjust homing switch corrections, delta radius, and X and Y tower position offsets
; S=7 Adjust homing switch corrections, delta radius, X and Y tower position offsets, and diagonal rod length

M561                        ; clear any bed transform, otherwise homing may be at the wrong height
G31 X0 Y0                    ; don't want any probe offset for this
G28                            ; home the printer

; 13 points, 6 factors, probing radius: 100, probe offset (0, 0)
G30 P0 X0.00 Y100.00 Z-99999 H0
G30 P1 X64.28 Y76.60 Z-99999 H0
G30 P2 X98.48 Y17.36 Z-99999 H0
G30 P3 X86.60 Y-50.00 Z-99999 H0
G30 P4 X34.20 Y-93.97 Z-99999 H0
G30 P5 X-34.20 Y-93.97 Z-99999 H0
G30 P6 X-86.60 Y-50.00 Z-99999 H0
G30 P7 X-98.48 Y17.36 Z-99999 H0
G30 P8 X-64.28 Y76.60 Z-99999 H0
G30 P9 X0.00 Y50.00 Z-99999 H0
G30 P10 X43.30 Y-25.00 Z-99999 H0
G30 P11 X-43.30 Y-25.00 Z-99999 H0
G30 P12 X0 Y0 Z-99999 S6

G1 X0 Y0 Z150 F15000        ; get the head out of the way of the bed

Ultibots K250v
Rostock Max v2 Soon to be Full MetalMax
Mini Kossel


By dc42 13 February 2017 23:35

Administrator · 2,297 comments

It sounds to me that your Z probe trigger height is varying with XY position. See

Duet WiFi hardware designer and firmware engineer