Calibrating a large delta

dc42

@paboman said in Calibrating a large delta:

@dc42 To use the saved mesh grid I understand that I need to add G92 S1 in the config.g, is that right ?

It's better to include it at the end of your homeall.g file, or in your slicer start GCode.

paboman

do you mean Homedelta.g ?

I am not sure the height map is loaded properly as I still get the nozzle too high where the heightmap is showing more distance.

Config.g

; Z-Probe
M558 P5 H10 F600 T6000 I1                                               ; Set Z probe type to switch and the dive height + speeds (was P5)
G31 P600 X0 Y0 Z12.20                                                   ; Set Z probe trigger value, offset and trigger height
M557 R500 S50                                                           ; Define mesh grid R= probe Radius S= Mesh Spacing

Homedelta.g

; homedelta.g
; called to home all towers on a delta printer
;
; generated by RepRapFirmware Configuration Tool on Sun Feb 25 2018 16:19:34 GMT+0100 (ora solare Europa occidentale)
G91                        ; relative positioning
G1 S1 X2500 Y2500 Z2500 F6000 ; 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 F1000               ; move down a few mm so that the nozzle can be centred
G90                        ; absolute positioning
G1 X0 Y0 F1000             ; move X+Y to the centre

G92 S1			; Load Heightmap

Bed.g

; bed.g
; called to perform automatic delta calibration via G32

M561 ; clear any bed transform

; bed.g file for RepRapFirmware, generated by Escher3D calculator
; 16 points, 6 factors, probing radius: 500, probe offset (0, 0)
;The value of each H parameter should be (probe trigger height at that XY position) - (probe trigger height at centre of bed).

G28
G30 P0 X0.00 Y500.00 Z-99999 H0
G30 P1 X321.39 Y383.02 Z-99999 H0
G30 P2 X492.40 Y86.82 Z-99999 H0
G30 P3 X433.01 Y-250.00 Z-99999 H0
G30 P4 X171.01 Y-469.85 Z-99999 H0
G30 P5 X-171.01 Y-469.85 Z-99999 H0
G30 P6 X-433.01 Y-250.00 Z-99999 H0
G30 P7 X-492.40 Y86.82 Z-99999 H0
G30 P8 X-321.39 Y383.02 Z-99999 H0
G30 P9 X0.00 Y250.00 Z-99999 H0
G30 P10 X216.51 Y125.00 Z-99999 H0
G30 P11 X216.51 Y-125.00 Z-99999 H0
G30 P12 X0.00 Y-250.00 Z-99999 H0
G30 P13 X-216.51 Y-125.00 Z-99999 H0
G30 P14 X-216.51 Y125.00 Z-99999 H0
G30 P15 X0 Y0 Z-99999 S6

dc42

Yes, for a delta you would put it in homedelta.g, or possibly at the end of bed.g instead if you normally auto calibrate before printing.

paboman

@dc42

I have noticed only now a typo! that is why it wasn't working for me
I Was using G92 S1 instead of G29 S1