Genuine BLtouch 3.1 no output

ageis

So I I have definately wired the power correctly because it lights up and does the self test. After the test, the red led remains on. Presumably this means it hasn't found any issues?

With the pin retracted, I don't get a value in DWC. Also my mutltimeter is saying there's no voltage between the black wire and the white wire. Neither do I get any voltage when the pin is extended.

However I can retract and extend the pin via DWC. It just doesn't make a difference to the value in the Z column. I have wired the black wire to gnd and white wire to the in pin of the Z probe connector on my duet ethernet 2 board
So is it faulty?

I should buy the lottery because am lucky enough to get a faulty bltouch

fcwilt

@ageis The lines in your configuration file for this device - what do they contain?

ageis

@fcwilt

; Configuration file for Duet WiFi (firmware version 3.3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.16 on Sun Jul 23 2023 20:00:34 GMT+0100 (British Summer Time)

; General preferences
G90                                            ; send absolute coordinates...
M83                                            ; ...but relative extruder moves
M550 P"prusa"                                  ; set printer name

; Network
M552 P0.0.0.0 S1                               ; enable network and acquire dynamic address via DHCP
M586 P0 S1                                     ; enable HTTP
M586 P1 S0                                     ; disable FTP
M586 P2 S0                                     ; disable Telnet

; Drives
M569 P0 S1                                     ; physical drive 0 goes forwards
M569 P1 S1                                     ; physical drive 1 goes forwards
M569 P2 S1                                     ; physical drive 2 goes forwards
M569 P3 S1                                     ; physical drive 3 goes forwards
M584 X0 Y1 Z2 E3                               ; set drive mapping
M350 X16 Y16 Z16 E16 I1                        ; configure microstepping with interpolation
M92 X98.52 Y100.00 Z400.00 E161.3             ; set steps per mm
M566 X900.00 Y900.00 Z12.00 E120.00            ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z1000.00 E1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y20.00 Z400.00 E250.00            ; set accelerations (mm/s^2)
M906 X1300 Y800 Z800 E800 I30                   ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                        ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 S1                               ; set axis minima
M208 X250 Y190 Z210 S0                         ; set axis maxima

; Endstops
M574 X1 S1 P"xstop"                            ; configure switch-type (e.g. microswitch) endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop"                            ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin ystop
M574 Z1 S2                                     ; configure Z-probe endstop for low end on Z

; Z-Probe
;M558 P8 C"zprobe.in" H10 F120 T6000 ; set Z probe type to unmodulated and the dive height + speeds
M558 P9 C"^zprobe.in" H15 F120 T6000   
M950 S0 C"exp.heater3"
;G31 P500 X22 Y10 Z120.1              0; set Z probe trigger value, offset and trigger height
G31 P500 X30 Y52 Z0; set Z probe trigger value, offset and trigger height

M557 X40:235 Y0:190 S10                       ; define mesh grid

; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0                        ; create bed heater output on bedheat and map it to sensor 0
;M307 H0 B1 S1.00                               ; enable bang-bang mode for the bed heater and set PWM limit
M307 H0 R0.268 K0.283:0.000 D13.25 E1.35 S1.00 B0
M140 H0                                        ; map heated bed to heater 0
M143 H0 S120                                   ; set temperature limit for heater 0 to 120C
M308 S1 P"e0temp" Y"thermistor" T100000 B4138  ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T1                           ; create nozzle heater output on e0heat and map it to sensor 1
M307 H1 B0 S1.00                               ; disable bang-bang mode for heater  and set PWM limit
M143 H1 S280                                   ; set temperature limit for heater 1 to 280C

; Fans
M950 F0 C"fan0" Q500                           ; create fan 0 on pin fan0 and set its frequency
M106 P0 S0 H-1                                 ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"fan1" Q500                           ; create fan 1 on pin fan1 and set its frequency
M106 P1 S1 H1 T45                              ; set fan 1 value. Thermostatic control is turned on

; Tools
M563 P0 D0 H1 F0                               ; define tool 0
G10 P0 X0 Y0 Z0                                ; set tool 0 axis offsets
G10 P0 R0 S0                                   ; set initial tool 0 active and standby temperatures to 0C

; Custom settings are not defined
T0

So my wiring is exactly like the image on the documentation

https://docs.duet3d.com/manual/sensors/sensors_probe_bltouch_d2we.png

Why no voltage on the output though if it's config issue? Is it a PWM signal?

Phaedrux

@ageis said in Genuine BLtouch 3.1 no output:

It just doesn't make a difference to the value in the Z column.

You're unlikely to see any change displayed in DWC since the BLTouch triggers and instantly resets itself. Your best bet to see if it's functioning is to follow this guide: https://docs.duet3d.com/en/User_manual/Connecting_hardware/Z_probe_testing

fcwilt

@ageis Can you issue the commands that deploy and retract?

ageis

@fcwilt
Thats just it, I can. Thats what's got me confused.

When I issue M280 P0 S10 it extends and the led switches off.

When I issue M280 P0 S90 it retracts and the led turns on.

confused!

Just no response on the output. I have buzzed out the black and white wires. Just in case it's my dodgy crimping but they seem fine.

fcwilt

@ageis That leaves a bad input or the wrong input? Quadruple check you are connected to the correct pin and using the correct pin name.

Phaedrux

Does M401 and M402 work to deploy and retract?

Have you actually tried a G30 to see if it deploys the pin and trigger the pin by hand to see if it stops movement?

ageis

@Phaedrux
both M401 and 402 does nothing. but M280 P0 S10 and M280 S90 works.

I noticed the pin doesn't get deployed when executing G30 or a G28.
It should deploy the pin when I do a G30 right?

Phaedrux

@ageis said in Genuine BLtouch 3.1 no output:

both M401 and 402 does nothing.

Then your deployprobe.g and retractprobe.g either haven't been created or don't contain the correct commands. Or maybe they aren't in the right spot. They should be in the sys folder.

fcwilt

@ageis I seem to recall that for the M commands to work you need to create two files deployprobe.g and retractprobe.g and put the appropriate servo command into the file.

ageis

@fcwilt
Yeah I skipped that step by mistake. Rushing through things yet again. I never learn.

It works now.
Many Thanks to @fcwilt and @Phaedrux

The bltouch appears to be repeatable so far. The 5 trigger height measurments I did were all +/- 0.1mm of each other.

My chinese sister invented a good product. I believe the engineer that invented the BL TOuch was female and chinese. Unless the picture i saw was just a representive. I hope I can finally get a consistent first layer. Not 0.3mm on one side then barely anything on the other side.

Phaedrux

@ageis https://www.antclabs.com/about