BLTouch not really working

modl

Hi everyone

I am in the process of configuring my Duet 6HC for a custom 3D Printer and am facing an issue with setting up the BLTouch that I couldn't solve with the topics i already searched for on the matter.

When powering on, the BLTouch will initialize by retracting and deploying, then I can call M401 and M402 both will work. I was even able to do all steps of the Dynamic Test from here https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe But after that, in instruction 7 of "Calibrate the Z probe trigger height", G30 S-1 returns an error "Error: Probe already triggered at start of probing move". And then M401 and M402 don't work until i restart the machine...

Also Homing Z has never worked, it returns
G28 Z
Error: Failed to enable endstops

A few info

M558
Z Probe 0: type 9, input pin io4.in, output pin nil, dive height 5.0mm, probe speeds 120,120mm/min, travel speed 6000mm/min, recovery time 0.20 sec, heaters normal, max taps 1, max diff 0.03

config.g

; Configuration file for Duet 3 MB 6HC (firmware version 3.3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.15 on Mon Jan 09 2023 14:50:13 GMT+0100 (Central European Standard Time)

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

; Network
M552 P192.168.1.14 S1                                        ; disable Telnet

; Drives
M569 P0.2 S1
M569 P0.3 S1                                     ; physical drive 0.2 goes forwards
M569 P0.4 S1                                       ; physical drive 0.3 goes forwards
M569 P0.5 S0                                       ; physical drive 0.5 goes forwards
M569 P0.0 S1                                       ; physical drive 0.0 goes forwards
M569 P0.1 S1                                       ; physical drive 0.1 goes forwards
M584 X0.2 Y0.3:0:4 Z0.5 E0.0:0.1                       ; set drive mapping
M350 X16 Y16 Z16 E16:16 I1                         ; configure microstepping with interpolation
M92 X64.00 Y64.00 Z1600.00 E415.00:415.00          ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E120.00:120.00         ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z180.00 E1200.00:1200.00    ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z20.00 E250.00:250.00         ; set accelerations (mm/s^2)
M906 X2800 Y2800 Z2800 E700:700 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 X355 Y995 Z355 S0                             ; set axis maxima

; Endstops
M574 X1 S1 P"io0.in"                               ; configure switch-type (e.g. microswitch) endstop for low end on X via pin io0.in
M574 Y1 S1 P"io1.in"                               ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin io1.in

; Z-Probe
M950 S0 C"io4.out"                                 ; create servo pin 0 for BLTouch
M558 P9 C"io4.in" H5 F120 T6000 R0.2                   ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X-20 Y-40 Z2                                  ; set Z probe trigger value, offset and trigger height
M556 S50 X0 Y0 Z0                                  ; set orthogonal axis compensation parameters
M557 X15:340 Y15:980 S40                           ; define mesh grid

; Heaters
M308 S0 P"temp2" Y"thermistor" T100000 B4138       ; configure sensor 0 as thermistor on pin temp2
M950 H0 C"out0" T0                                 ; create bed heater output on out0 and map it to sensor 0
M307 H0 B1 S1.00                                   ; enable bang-bang mode for the bed heater and set PWM limit
M140 H0                                            ; map heated bed to heater 0
M143 H0 S120                                       ; set temperature limit for heater 0 to 120C
M308 S1 P"temp0" Y"thermistor" T100000 B4138       ; configure sensor 1 as thermistor on pin temp0
M950 H1 C"out1" T1                                 ; create nozzle heater output on out1 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
M308 S2 P"temp1" Y"thermistor" T100000 B4138       ; configure sensor 2 as thermistor on pin temp1
M950 H2 C"out2" T2                                 ; create nozzle heater output on out2 and map it to sensor 2
M307 H2 B0 S1.00                                   ; disable bang-bang mode for heater  and set PWM limit
M143 H2 S280                                       ; set temperature limit for heater 2 to 280C

; Fans
M950 F0 C"out3" Q0                                 ; create fan 0 on pin out9 and set its frequency
M106 P0 S1 H1:2 T100                                 ; set fan 0 value. Thermostatic control is turned on

; Tools                                  ; set mixing ratios for tool 2
M563 P0 S"Right Extruder" D0 H1 F0  ; define tool 0
G10 P0 X-10 Y0 Z0 ; set tool 0 axis offsets
G10 P0 R0 S0      ; set initial tool 0 active and standby temperatures to 0C
M563 P1 S"Left Extruder" D1 H2 F0  ; define tool 2
G10 P1 X10 Y0 Z0  ; set tool 1 axis offsets
G10 P1 R0 S0      ; set initial tool 1 active and standby temperatures to 0C

; Custom settings are not defined


; Miscellaneous
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.3.15 on Mon Jan 09 2023 14:50:13 GMT+0100 (Central European Standard Time)
G91               ; relative positioning
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 Z-360 F1800 ; move Z down until the endstop is triggered
G92 Z0            ; set Z position to axis minimum (you may want to adjust this)

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

I'm humbly asking for your lights as this is all quite new to me !

Thank you in advance

all the best

modl

Also

M119
Endstops - X: not stopped, Y: not stopped, Z: no endstop, Z probe: at min stop

Z no endstop ? should i add it with M574 Z1 S2 ? I thought this wasn't necessary

M122
=== Diagnostics ===
RepRapFirmware for Duet 3 MB6HC version 3.4.5 (2022-11-30 19:35:23) running on Duet 3 MB6HC v1.01 (standalone mode)
Board ID: 08DJM-9P63L-DJ3S0-7JTD2-3S86S-KAJ78
Used output buffers: 3 of 40 (15 max)
=== RTOS ===
Static ram: 152760
Dynamic ram: 97784 of which 204 recycled
Never used RAM 99780, free system stack 154 words
Tasks: NETWORK(ready,33.3%,210) ETHERNET(notifyWait,0.0%,432) HEAT(notifyWait,0.0%,322) Move(notifyWait,0.0%,266) CanReceiv(notifyWait,0.0%,944) CanSender(notifyWait,0.0%,336) CanClock(delaying,0.0%,333) TMC(notifyWait,8.2%,57) MAIN(running,58.4%,1083) IDLE(ready,0.0%,30), total 100.0%
Owned mutexes:
=== Platform ===
Last reset 01:12:22 ago, cause: power up
Last software reset at 2023-01-11 20:18, reason: User, GCodes spinning, available RAM 99984, slot 1
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x00400000 BFAR 0x00000000 SP 0x00000000 Task MAIN Freestk 0 n/a
Error status: 0x00
Step timer max interval 130
MCU temperature: min 31.4, current 35.2, max 35.4
Supply voltage: min 23.5, current 23.8, max 24.0, under voltage events: 0, over voltage events: 0, power good: yes
12V rail voltage: min 12.0, current 12.1, max 12.2, under voltage events: 0
Heap OK, handles allocated/used 0/0, heap memory allocated/used/recyclable 0/0/0, gc cycles 0
Events: 0 queued, 0 completed
Driver 0: standstill, SG min 0, mspos 776, reads 20279, writes 20 timeouts 0
Driver 1: standstill, SG min 0, mspos 8, reads 20285, writes 14 timeouts 0
Driver 2: standstill, SG min 0, mspos 168, reads 20280, writes 19 timeouts 0
Driver 3: standstill, SG min 0, mspos 776, reads 20280, writes 19 timeouts 0
Driver 4: standstill, SG min 0, mspos 776, reads 20281, writes 19 timeouts 0
Driver 5: standstill, SG min 0, mspos 88, reads 20249, writes 51 timeouts 0
Date/time: 2023-01-16 13:59:32
Slowest loop: 15.69ms; fastest: 0.05ms
=== Storage ===
Free file entries: 10
SD card 0 detected, interface speed: 25.0MBytes/sec
SD card longest read time 3.0ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 125, segments created 6, maxWait 2141414ms, bed compensation in use: none, comp offset 0.000
=== MainDDARing ===
Scheduled moves 68, completed 68, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 48], CDDA state -1
=== AuxDDARing ===
Scheduled moves 0, completed 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1 -1, chamber heaters -1 -1 -1 -1, ordering errs 0
=== GCodes ===
Segments left: 0
Movement lock held by null
HTTP is idle in state(s) 0
Telnet is idle in state(s) 0
File is idle in state(s) 0
USB is idle in state(s) 0
Aux is idle in state(s) 0
Trigger is idle in state(s) 0
Queue is idle in state(s) 0
LCD is idle in state(s) 0
SBC is idle in state(s) 0
Daemon is idle in state(s) 0
Aux2 is idle in state(s) 0
Autopause is idle in state(s) 0
Code queue is empty
=== CAN ===
Messages queued 39083, received 0, lost 0, boc 0
Longest wait 0ms for reply type 0, peak Tx sync delay 0, free buffers 50 (min 50), ts 21714/0/0
Tx timeouts 0,0,21713,0,0,17368 last cancelled message type 4514 dest 127
=== Network ===
Slowest loop: 17.89ms; fastest: 0.03ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0) Telnet(0)
HTTP sessions: 1 of 8
= Ethernet =
State: active
Error counts: 0 0 0 1 0 0
Socket states: 2 2 2 2 2 0 0 0
=== Multicast handler ===
Responder is inactive, messages received 0, responses 0

jay_s_uk

@modl said in BLTouch not really working:

G1 H1 Z-360 F1800 ; move Z down until the endstop is triggered

you should be using G30 to probe with a probe rather than G1 H1 Z...
make sure you move the hotend to where you want to probe using G1 X Y before you use G30

You don't need the M574 Z1 S2 line

Phaedrux

@modl said in BLTouch not really working:

But after that, in instruction 7 of "Calibrate the Z probe trigger height", G30 S-1 returns an error "Error: Probe already triggered at start of probing move".

Is the pin too close to the bed to deploy when that happens?

modl

@jay_s_uk Thank you for your reply i'll be trying that tomorrow morning
@Phaedrux No the pin was like 2cm away from the bed

modl

@jay_s_uk Ok I tried that and the sequence starts BUT the BLTouch doesn't deploy.
I tried a few things with M401 and M402: they work when starting up the printer, but not after homing x and y.
I tried to do a Z homing with the bltouch initially deployed and the probing stopped as expected when BLTouch was triggered by the bed

jay_s_uk

@modl you need to work out why M401 and M402 don't work then.
Do you have a deployprobe.g and retractprobe.g in sys?

modl

@jay_s_uk Yes they say M280 P0 S90 ; retract BLTouch and M280 P0 S10 ; deploy BLTouch

jay_s_uk

@modl so does using M401 and M402 by themselves work every time?

modl

I tried reverting from RFF3.4.5 to 3.4.4 following the advice in the release notes because of some potential homing issues. It didn't solve the issue

modl

@jay_s_uk They work every time at startup, but not after homing x and y

jay_s_uk

@modl that indicates that you either have a wiring issue or you have something in your homing files thats causing issues.
can you post homex.g and homey.g?

modl

@jay_s_uk So M401 and 402 actually work after homing x alone.

; homex.g
; called to home the X axis
;
; generated by RepRapFirmware Configuration Tool v3.3.15 on Mon Jan 09 2023 14:50:13 GMT+0100 (Central European Standard Time)
G91               ; relative positioning
G1 H2 Z5 F6000    ; lift Z relative to current position
G1 H1 X-360 F1800 ; move quickly to X axis endstop and stop there (first pass)
G1 H2 X5 F6000    ; go back a few mm
G1 H1 X-360 F360  ; move slowly to X axis endstop once more (second pass)
G1 H2 Z-5 F6000   ; lower Z again
G90               ; absolute positioning

; homey.g
; called to home the Y axis
;
; generated by RepRapFirmware Configuration Tool v3.3.15 on Mon Jan 09 2023 14:50:13 GMT+0100 (Central European Standard Time)
G91                ; relative positioning
G1 H2 Z5 F6000     ; lift Z relative to current position
G1 H1 Y-1000 F1800 ; move quickly to Y axis endstop and stop there (first pass)
G1 H2 Y5 F6000     ; go back a few mm
G1 H1 Y-1000 F360  ; move slowly to Y axis endstop once more (second pass)
G1 H2 Z-5 F6000    ; lower Z again
G90                ; absolute positioning

jay_s_uk

@modl so theres nothing in there that should stop M401 and M402 from working.
next is to look at your wiring and make sure nothing is being pulled etc

modl

Ok M401 and M402 don't work after homing y alone, could there be a short somewhere with y endstops or motors ? Or could an overload cause this?

modl

@jay_s_uk Physically everything looks fine. And if i'm resetting the system, M401 and M402 will work at the exact same position

jay_s_uk

@modl can you home Y and then send M558 and post the output?

modl

@jay_s_uk
At startup

M558
Z Probe 0: type 9, input pin io4.in, output pin nil, dive height 5.0mm, probe speeds 120,120mm/min, travel speed 6000mm/min, recovery time 0.20 sec, heaters normal, max taps 1, max diff 0.03

After homing Y

M558
Z Probe 0: type 9, input pin io4.in, output pin nil, dive height 5.0mm, probe speeds 120,120mm/min, travel speed 6000mm/min, recovery time 0.20 sec, heaters normal, max taps 1, max diff 0.03

modl

@jay_s_uk I found the culprit !! I actually had an extruder wired the wrong way when i first powered the machine, I rewired it as soon as i found out but it's been getting really hot even if idle since then. I unplugged it from the board and the probing now works. How to know if the stepper is cooked ?

Thank you very much for all your replies and your guidance

modl

Hope i didn't cook the driver...