My 6HC seems to think I have a CAN connected which I do not

darylprice

@chrishamm
I found that the P value in the M280 P? S10 command does not want the P9 (for a BLTouch probe), but a P0. It works now with that. I found that on the BLTouch web site

dc42

@darylprice the correct P value to use in the M280 command is the value you used for S in the M950 command to assign the servo pin.

darylprice

@dc42 @chrishamm @T3P3Tony @Phaedrux
I want to personally thank all of you for helping me. I know you have to deal with us newbies all the time.
Hope I listed all of the people who helped. I am sure I will be reaching out again.
Thanks Daryl

darylprice

@dc42
Quick question. What is the safest way to shutdown my printer before I cut the power?
Daryl

jay_s_uk

@darylprice just pull the power. theres no shutdown needed

gloomyandy

@darylprice Are you running in SBC mode or standalone?

darylprice

@gloomyandy SBC PI 4

jay_s_uk

@darylprice in that case shut the pi down first.
see here https://docs.duet3d.com/en/User_manual/Machine_configuration/SBC_setup#shutdown-or-reboot-sbc

chrishamm

@darylprice That's quite odd. In order to replicate this issue I got an original BLTouch and that one works well with the PWM values generated by the configtool.

darylprice

@chrishamm @dc42

I am having problems with my BLTouch. M401 and M402 work fine, but If I run G30 it says it is already triggered. I have been reading some of the forum info on other people having this issue, but I really cannot find the answer. I have two BLTouches and they both do the same thing.
Any Advice

My Config.g amd Homeall.g
; Configuration file for RepRapFirmware on Duet 3 Main Board 6HC
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.5.10 on Wed Jan 29 2025 09:43:57 GMT-0800 (Pacific Standard Time)

; General
G90 ; absolute coordinates
M83 ; relative extruder moves
M550 P"Duet 3" ; set hostname

; Smart Drivers
M569 P0.0 S1 D2 ; driver 0.0 goes forwards (X axis)
M569 P0.1 S1 D2 ; driver 0.1 goes forwards (Y axis)
M569 P0.2 S1 D2 ; driver 0.2 goes forwards (Z axis)
M569 P0.3 S1 D2 ; driver 0.4 goes forwards (z axis)
M569 P0.4 S1 D2 ; driver 0.3 goes forwards (extruder 0)

; Motor Idle Current Reduction
M906 I30 ; set motor current idle factor
M84 S30 ; set motor current idle timeout

; Axes
M584 X0.0 Y0.1 Z0.2:0.3 ; set axis mapping
M350 X16 Y16 Z16 'z16 I1 ; configure microstepping with interpolation
M906 X1400 Y3200 Z1400 'z1400 ; set axis driver currents
M92 X662 Y662 Z662 'z662 ; configure steps per mm
M208 X0:100 Y0:100 Z0:100 'z0:50 ; set minimum and maximum axis limits
M566 X900 Y900 Z12 'z12 ; set maximum instantaneous speed changes (mm/min)
M203 X100000 Y10000 Z600 'z600 ; set maximum speeds (mm/min)
M201 X500 Y500 Z20 'z20 ; set accelerations (mm/s^2)

; Extruders
M584 E0.4 ; set extruder mapping
M350 E16 I1 ; configure microstepping with interpolation
M906 E1400 ; set extruder driver currents
M92 E420 ; configure steps per mm
M566 E120 ; set maximum instantaneous speed changes (mm/min)
M203 E3600 ; set maximum speeds (mm/min)
M201 E250 ; set accelerations (mm/s^2)

; Kinematics
M669 K0 ; configure Cartesian kinematics

; Probes
M558 K0 P9 C"!io4.in" H5 F120 T600 ; configure BLTouch probe via slot #0
G31 P500 X0 Y0 Z0.7 ; set Z probe trigger value, offset and trigger height
M950 S0 C"io4.out" ; create servo #0 for BLtouch

; Endstops
M574 X1 P"io8.in" S1 ; configure X axis endstop
M574 Y1 P"io6.in" S1 ; configure Y axis endstop
;M574 Z1 S2 ; configure Z axis endstop
;M574 'z1 S2 ; configure z axis endstop

; Sensors
M308 S0 P"temp0" Y"thermistor" A"Heated Bed" T100000 B4725 C7.06e-8 ; configure sensor #0
M308 S1 P"temp1" Y"thermistor" A"Nozzle" T100000 B4725 C7.06e-8 ; configure sensor #1

; Heaters
M950 H0 C"out0" T0 ; create heater #0
M143 H0 P0 T0 C0 S140 A0 ; configure heater monitor #0 for heater #0
M307 H0 R2.43 D5.5 E1.35 K0.56 B1 ; configure model of heater #0
M950 H1 C"out1" T1 ; create heater #1
M143 H1 P0 T1 C0 S285 A0 ; configure heater monitor #0 for heater #1
M307 H1 R2.43 D5.5 E1.35 K0.56 B0 ; configure model of heater #1
M950 H2 C"out2" T1 ; create heater #2
M143 H2 P0 T1 C0 S285 A0 ; configure heater monitor #0 for heater #2
M307 H2 R2.43 D5.5 E1.35 K0.56 B0 ; configure model of heater #2

; Heated beds
M140 P0 H0 ; configure heated bed #0

; Fans
M950 F0 C"out3" ; create fan #0
M106 P0 S0 L0 X1 B0.1 ; configure fan #0
M950 F1 C"out4" ; create fan #1
M106 P1 S0 B0.1 H1 T45 ; configure fan #1

; Tools
M563 P0 D0 H1 F0 ; create tool #0
M568 P0 R0 S0 ; set initial tool #0 active and standby temperatures to 0C

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.5.10 on Wed Feb 05 2025 10:59:30 GMT-0800 (Pacific Standard Time)

; increase Z
G91 ; relative positioning
G1 H2 Z7 F1200 ; move Z relative to current position to avoid dragging nozzle over the bed
G90 ; absolute positioning

; home XY
var xTravel = move.axes[0].max - move.axes[0].min + 5 ; calculate how far X can travel plus 5mm
var yTravel = move.axes[1].max - move.axes[1].min + 5 ; calculate how far Y can travel plus 5mm
G91 ; relative positioning
G1 H1 X{var.xTravel} Y{var.yTravel} F600 ; coarse home in the +X and +Y directions
G1 H2 X-5 Y-5 F1200 ; move back 5mm
G1 H1 X{var.xTravel} Y{var.yTravel} F300 ; fine home in the +X and +Y directions
G90 ; absolute positioning

; home Z
var xCenter = move.compensation.probeGrid.mins[0] + (move.compensation.probeGrid.maxs[0] - move.compensation.probeGrid.mins[0]) / 2 - sensors.probes[0].offsets[0]
var yCenter = move.compensation.probeGrid.mins[1] + (move.compensation.probeGrid.maxs[1] - move.compensation.probeGrid.mins[1]) / 2 - sensors.probes[0].offsets[1]
G1 X{var.xCenter} Y{var.yCenter} F1200 ; go to bed centre
G30 ; probe the bed

M98 P"home'z.g" ; home z axis

`

Phaedrux

@darylprice said in My 6HC seems to think I have a CAN connected which I do not:

M558 K0 P9 C"!io4.in" H5 F120 T600 ; configure BLTouch probe via slot #0

Remove the ! from io4.in. The exclamation mark inverts the signal of the pin, so it's being seen as triggered when idle, hence the error.

darylprice

@Phaedrux

Could you point me to the best way to build my bed.g file. I really need to figure out bed compensation and build a matrix

Phaedrux

@darylprice said in My 6HC seems to think I have a CAN connected which I do not:

@Phaedrux

Could you point me to the best way to build my bed.g file. I really need to figure out bed compensation and build a matrix

For that question I think you would be better off starting a new thread as this thread has worked it's way through your initial problem and has gotten quite long.

Restate your current status with the printer, some details about it, include your config and homing files, and any issues that you currently face.