Posts made by PUGCanada

Exactly what I needed. Everything is working now. Thank you!

I blue up my old Duet Maestro 2 Ethernet a few weeks ago by shorting out the mosfet for the heater. So I ordered a replacement and this time got the Duet Maestro 2 Wifi. I immediately upgraded the firmware to 3.1.1 since it was a new config build. The issue I am having is that the BLTouch is not responding at all. As soon as I turn on the printer the BLTouch is flashing red and the probe stays in whatever the last position it was in. The Z-Probe on the status screen always shows Z-Probe = 1000.

I have the wiring for the BLTouch hooked up to the dedicated 4 pin connector on the board. From front to back of the board, the BLTouch is wired as such:

1. White
2. Black/Brown
3. Orange
4. Red

In Config.g this is my Z-Probe settings:
; Z-Probe
M950 S0 C"^zprobe.mod" ; 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 X0 Y0 Z2.5 ; set Z probe trigger value, offset and trigger height
M557 X15:215 Y15:195 S20 ; define mesh grid

Here is my deployprobe.g:
; deployprobe.g
; called to deploy a physical Z probe
;
; generated by RepRapFirmware Configuration Tool v3.1.10 on Sat Dec 19 2020 20:28:49 GMT-0500 (Eastern Standard Time)
M280 P0 S10 ; deploy BLTouch

Here is my retractprobe.g:
; retractprobe.g
; called to retract a physical Z probe
;
; generated by RepRapFirmware Configuration Tool v3.1.10 on Sat Dec 19 2020 20:28:49 GMT-0500 (Eastern Standard Time)
M280 P0 S90 ; retract BLTouch

And finally, here is my homez.g:
; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.1.10 on Sat Dec 19 2020 20:28:50 GMT-0500 (Eastern Standard Time)
G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G90 ; absolute positioning
G1 X15 Y15 F6000 ; go to first probe point
G30 ; home Z by probing the bed

; Uncomment the following lines to lift Z after probing
;G91 ; relative positioning
;G1 Z5 F100 ; lift Z relative to current position
;G90 ; absolute positioning

The BLTouch worked perfectly when I was using it with my old Duet Maestro running old firmware but does not work with the new firmware. I have searched high and low to try and find out why it isn't working. Anyone able to help me out?

There is no play in the X axis which means the BL Touch should be able to compensate for the difference, as far as I understand.. I have tightened the eccentric nuts a bit more and I ran another G29 command right now but the graph is VERY similar. There is absolutely no play on the gantry. It has been printing perfectly for 6 months until I threw the Duet Maestro in. This can't be something that I have done as again, nothing was changed but that and all of a sudden I am having problems? Very frustrating but I really do appreciate your help!

Here are a few images to show the range from left to right on the bed.

@phaedrux said in Duet Maestro with BL Touch First Layer Issues.:

Can you post an image of the resulting heightmap?

You're not the first person to report an anomalous height reading at the top left of the bed. It was theorized to maybe be a result of the bed magnets or the cables causing some movement.

I wish it was that easy. Here is an image of the heightmap and it makes NO SENSE! I am using a glass bed, no magnets and fixed aluminum spacers.

I have an Ender 3 Pro with E3D Volcano hotend setup and BL Touch. The system was working great until I got the Duet Maestro board and hooked it up. Everything is working so far except when it completes a 110 point G29 bed leveling command and then starts printing to high on the top left hand side of the bed! The Z-offset is setup perfect since I can run the command "G1 Z0 F6000" after an all home and the height is spot on in the middle of the bed with the bed heated up.

When I used the BLTouch with the stock board, it printed perfect level on the entire bed every single time. It almost seems like my Duet isn't even remembering the ABL measurements and just printing without knowing if it is level or not.

What am I missing here as I am pulling out my hair trying to figure this out.