No 3.3V with bltouch
-
@pipersw, it sounds to me that you have used the wrong pins on the Z probe connector, because when you connect the BLTouch you are shorting the +3.3V pin on the Z probe connector to ground.
-
Is this what you followed?
https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe
I've run into people who had a bad connection at the plug on the BLTouch itself. The wires are pretty delicate.
Try checking all the wires for continuity with a multimeter.
-
I have done the following wiring. Red wire for Z probe output is connected to white wire.
https://photos.app.goo.gl/bKdUWafcFMTXi5n67 -
Wrong wiring ! I reverse two wire and now the bltouch selftest at duet boot.
Now when I home z the bltouch not deploy. I investigate.
I put signal on pin 8 heater 3, but the wizard print in config files heater 4, it is good ? -
@pipersw I don't understand what you mean. Can you show the gcodes you mean?
-
I follow the guide here for connection : I use heater 3 pin 8 on Duet2Wifi 1.04 with firmware 2.02
At power up, the bltouch is red with a selftest (deploy and retract).
When I use macro for deploy and retract, nothing happen, and if I home Z, the bltouch don't deploy.config.g:
; Endstops
M574 X1 Y1 S0 ; Set active low and disabled endstops; Z-Probe
M574 Z1 S2 ; Set endstops controlled by probe
M307 H3 A-1 C-1 D-1 ; Disable heater 3 on PWM channel for BLTouch
M558 P9 H5 F120 T6000 ; Set Z probe type to bltouch and the dive height + speeds
G31 P25 X-26 Y-40 Z0 ; Set Z probe trigger value, offset and trigger height
M557 X20:200 Y20:200 S40 ; Define mesh griddeployprobe.g:
M280 P3 S10 I1retractprobe.g:
M280 P3 S90 I1 -
what version of the bltouch do you have?
apparently there is a new 3.0 version which is not compatible with the 2.0 commands. -
I have the smart 2.0 bltouch
-
Check that you don't have another M307 H3 command in config-override.g.
-
I don't have a config-override.g file. I progress, home all works, I have just the mesh with the probe outside the bed despite of M557 in config.g
config.g:
; Axis Limits
M208 X-34 Y0 Z0 S1 ; Set axis minima
M208 X220 Y215 Z240 S0 ; Set axis maxima; Z-Probe
M574 Z1 S2 ; Set endstops controlled by probe
M307 H3 A-1 C-1 D-1 ; Disable heater 3 on PWM channel for BLTouch
M558 P9 H5 F120 T6000 ; Set Z probe type to bltouch and the dive height + speeds
G31 P25 X-26 Y35 Z1.740 ; Set Z probe trigger value, offset and trigger height
M557 X30:220 Y45:215 S40 ; Define mesh grid -
I have to take in account the probe offset in M557, so I will try
M557 X30:220 Y40:180 S40
