How do I use the BL-Touch When homing Z-axis

TomasL

Well as it says in the title
Tried to put M574 Z1 S2 , it did not work, it crached hard into the bed.

Board: Duet 2 WiFi (2WiFi)
Firmware: RepRapFirmware for Duet 2 WiFi/Ethernet 3.4.1 (2022-06-01)
Duet WiFi Server Version: 1.26

BL Touch config is:

;BL-Touch
M307 H3 A-1 C-1 D-1
M950 S0 C"exp.heater3"                                 ; create servo pin 0 for BLTouch
M558 P9 C"^zprobe.in" H5 F120 T6000                    ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X64 Y0 Z2.46                                  ; set Z probe trigger value, offset and trigger height

jay_s_uk

@tomasl use G30, not G1 H1 Z

TomasL

@jay_s_uk
Well, that whas what RRF put in the config.g
So, How do I use the G30 code?

jay_s_uk

@tomasl e.g.

G1 X100 Y100
G30

obviously changing the move location to the centre of the bed, taking into account to offset of the probe as the firmware won't

TomasL

@jay_s_uk
Ok, so I,ll put this in the config.g, presumably at the end.
So it would read

G1 X33,5 Y82,5 Z5
G30

If I do this via the console, Z stops att 2,43 (+5mm) I do assume that the X-axis is lifted 5 mm after the g30 command.

jay_s_uk

@tomasl not in config, in your homing files

jay_s_uk

@tomasl and if you want any further movements after the probe then you'll need to add those in

TomasL

@jay_s_uk
Ok, I have put in homeall.g and homez.g

G1 X33,5 Y82,5 F6000
G30

However Z-level is the same as the trigger height, is that correct?

jay_s_uk

@tomasl the height it'll set is the z offset that you've set in G31 in your config

TomasL

@jay_s_uk Ok

Phaedrux

For the record

https://docs.duet3d.com/en/User_manual/Connecting_hardware/Z_probe_testing
https://docs.duet3d.com/en/User_manual/Connecting_hardware/Z_probe_connecting#bltouch

TomasL

@phaedrux Yes, I know all that, however my question was not answer in those documents.

droftarts

@tomasl For example configurations, see https://docs.duet3d.com/User_manual/Machine_configuration/Configuration_cartesian#homing-z

Ian