manual bed probe - for loadcell

SanderLPFRG

Hi,

I can now only configure our analogue-in loadcell probe as a SZP, which reads the signal correctly, and G30 functions well, but when doing a G29, it tries to scan the bed, resulting in a nozzle that scrapes the bed.

Until I figure out the firmware, I want to enable a simple mesh probe manually, which I want to do with;

M561                    ; clear any bed transform

; If the printer hasn't been homed, home it
if !move.axes[0].homed || !move.axes[1].homed || !move.axes[2].homed
  G28

; Probe the bed and do auto calibration
G1 X{move.axes[0].min} Y{move.axes[1].min}  U{move.axes[3].max} Z10 F12000   ; go to neutral position

;Start probing
G30 P0 X25 Y25 Z-99999
G30 P1 X299.5 Y25 Z-99999
G30 P2 X574 Y25 Z-99999
G30 P3 X25 Y250 Z-99999
G30 P4 X299.5 Y250 Z-99999
G30 P5 X574 Y250 Z-99999
G30 P6 X25 Y475 Z-99999
G30 P7 X299.5 Y475 Z-99999
G30 P8 X574 Y475 Z-99999
G29 S3 P"usual.csv" ; save probed points to "usual.csv"

I wonder if such thing is even possible, any tips?

jay_s_uk

@SanderLPFRG switch the probe back to you P0 in the bed file then restore it as the original type at the end

SanderLPFRG

@jay_s_uk Hi, thanks for the reply
You mean setting the Probe type to P0? can I then still do a G30 probe with the load cell?

jay_s_uk

@SanderLPFRG yes, i mean setting the probe type to P0 in M558.
I don't think you can use G30 to create a bed mesh itself.
You would have to create the mesh spacing with M557. you can also use the selective probe feature mentioned here https://docs.duet3d.com/en/User_manual/Connecting_hardware/Z_probe_mesh_bed#selective-probing

SanderLPFRG

@jay_s_uk yeahh I tried that already, but selective probing with scanning-type probe still tries to, youknow, scan.

Guess the only possibility is to enable the possibility to define a type1 probe on a CANboard

jay_s_uk

@SanderLPFRG but did you try by undefining the probe first? if theres no probe defined it can't scan