Duet 3 BLTouch probing issues

Vampora · 1 Dec 2020, 13:28

I have tried RRF 3.1.1 and 3.2 beta 4 and had the same issue on both. I am currently on 3.1.1

I do not have a BLTouch available to try, but have tried BLTouch versions 1.1 and 2.2 that I pulled off of working printers to troubleshoot with. I am currently using a knock off.

The problem I am having is when I probe I continue to get -5.000 readings. It appears to be z homing just fine with some notables I will mention below, but when I try to G32 I get missing probes or the following:

G32
Leadscrew adjustments made: -5.000 -5.000 -5.000, points used 3, (mean, deviation) before (-5.000, 0.000) after (-0.000, 0.000

I cannot get a 4 point to complete all of the probes. Only the 3 point seems to actually register the probes enough to get that adjustment readout.

I have also tried a probe test and I get the same thing:

M98 P"0:/macros/Probe_Test"
G32 bed probe heights: -5.000 -5.000 -5.000 -5.000 -5.000 -5.000 -5.000 -5.000 -5.000 -5.000, mean -5.000, deviation from mean 0.000

I also notice that even when I z home the first probe will read 0.75mm the same as my probe offset. The next 2 will read -4.25 which is where i think that -5.000 is coming from.

Here are the uploads.
retractprobe.g homez.g homey.g homex.g homeall.g deployprobe.g config.g bed.g

Vampora · 1 Dec 2020, 13:33

; Configuration file for Duet 3 (firmware version 3)

; General preferences
G21
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"RailcoreOrange" ; set printer name
M669 K1 ; select CoreXY mode

; Drives
;X&Y
M569 P0.0 S0 ; physical drive 0.0 goes backwards X
M569 P0.1 S1 ; physical drive 0.1 goes forwards Y
;Z
M569 P1.0 S1 ; physical drive 1.0 goes forwards Front Left Z
M569 P1.1 S1 ; physical drive 1.1 goes forwards Rear Left Z
M569 P1.2 S1 ; physical drive 1.2 goes forwards Right Z
;Extruders
M569 P0.3 S1 ; physical drive 0.3 goes forwards
M569 P0.4 S1 ; physical drive 0.4 goes forwards

;Leadscrew locations
M671 X-25:-25:372 Y-12:242:115 S7.5 ;Front left, Rear Left, Right S7.5 is the max correction - measure your own offsets, to the bolt for the yoke of each leadscrew

;Stepper Mapping and Settings
M584 X0.0 Y0.1 Z1.0:1.1:1.2 E0.3:0.4 ; set drive mapping
M350 X16 Y16 Z16 E16:16 I1 ; configure microstepping with interpolation
M92 X200.00 Y200.00 Z1600.00 E837.00:837.00 ; set steps per mm
M566 X1000.00 Y1000.00 Z100.00 E1500.00:1500.00 ; set maximum instantaneous speed changes (mm/min)
M203 X24000.00 Y24000.00 Z900.00 E3600.00:3600.00 ; set maximum speeds (mm/min)
M201 X3000.00 Y3000.00 Z100.00 E1500.00:1500.00 ; set accelerations (mm/s^2)
M906 X1500 Y1500 Z1000 E800:800 I20 ; 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 X270 Y250 Z300 S0 ; set axis maxima

; Endstops
M574 X1 S1 P"io1.in" ; Map the X endstop to io1.in
M574 Y1 S1 P"io3.in" ; May the Y endstop to io3.in
;M574 Z0 S2 ; Z endstop controlled by BLTouch probe

; Z-Probe
M557 X15:215 Y15:195 S20 ; define mesh grid

;BLTouch
M558 P9 C"^io7.in" H5 R1 F120 T6000 A5 S0.02 B1 ; Define the bltouch input on io7.in
M950 S0 C"io7.out" ; Define the bltouch servo on io7.out
G31 X-30 Y0 Z0.75 P25 ; Set the offsets for the bltouch

; Heaters
M308 S0 P"temp0" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out0" T0 ; create bed heater output on out0 and map it to sensor 0
M307 H0 A240.3 C608.7 D8.2 S1.00 V24.1 B0 ; disable 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"temp1" Y"thermistor" T500000 B4723 R4700 C1.196220e-7 ; configure sensor 1 as thermistor on pin temp1
M950 H1 C"out1" T1 ; create nozzle heater output on out1 and map it to sensor 1
M307 H1 R2.300 C194.9 D4.24 S1.00 V24.1 ; disable bang-bang mode for heater and set PWM limit
M143 H1 S280 ; set temperature limit for heater 1 to 280C
M308 S2 P"temp2" Y"thermistor" T500000 B4723 R4700 C1.196220e-7 ; configure sensor 2 as thermistor on pin temp2
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 S450 ; set temperature limit for heater 2 to 450C

; Fans
M950 F0 C"out7" ; Hotend fan 0 on pin out7 and set its frequency
M106 P0 S1 H1:2 T30 ; Hotend fan 0 value. Thermostatic control is turned on
M950 F1 C"out8" ; Layer Fan 1 on pin out8 and set its frequency
M106 P1 S0 H-1 ; Layer fan 1 value. Thermostatic control is turned off

; Tools
M563 P1 S"standard" D0 H1 F0 ; define tool 1
G10 P1 X0 Y0 Z0 ; set tool 1 axis offsets
G10 P1 R0 S0 ; set initial tool 1 active and standby temperatures to 0C
M563 P2 S"magnum" D1 H2 F0 ; define tool 2
G10 P2 X0 Y0 Z0 ; set tool 2 axis offsets
G10 P2 R0 S0 ; set initial tool 2 active and standby temperatures to 0C

; Custom settings are not defined

; Miscellaneous
M575 P1 S1 B57600 ; enable support for PanelDue
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss

; Filament Sensor
M591 D0 P7 C"io6.in" S0 E50 L1.25 R25:175 A1

bed.g

M561 ; clear any existing bed transform
G1 Z5 H2
G30 P0 X2 Y2 Z-99999
G30 P1 X2 Y229 Z-99999
G30 P2 X240 Y229 Z-99999
G30 P3 X240 Y2 Z-99999 S3
G1 X0 Y0 F5000 ; move the head to the corner (optional)

Veti · 1 Dec 2020, 13:48

@Vampora said in Duet 3 BLTouch probing issues:

G1 Z5 H2

try removing this line
and adding G28 ; home

like the guide says

https://duet3d.dozuki.com/Wiki/Bed_levelling_using_multiple_independent_Z_motors

jay_s_uk · 1 Dec 2020, 13:51

Any why are you measuring 4 points when you only have 3 screws?

Vampora · 1 Dec 2020, 14:08

I started out with 3 and some other that had working configs with the same printer use 4 i guess. I am confused on that one as well.

@jay_s_uk said in Duet 3 BLTouch probing issues:

Any why are you measuring 4 points when you only have 3 screws?

I started out with 3 and some other that had working configs with the same printer use 4 i guess. I am confused on that one as well.

@Veti said in Duet 3 BLTouch probing issues:

@Vampora said in Duet 3 BLTouch probing issues:

G1 Z5 H2

try removing this line
and adding G28 ; home

like the guide says

https://duet3d.dozuki.com/Wiki/Bed_levelling_using_multiple_independent_Z_motors

Ill give it a shot.

jay_s_uk · 1 Dec 2020, 14:09

Ideally, you should be aiming to probe close to your Z screws as that's where the adjustments take place.

Vampora · 1 Dec 2020, 14:16

swapping with the g28 still has the 4th probe missing

G32
Error: Z probe was not triggered during probing move

Vampora · 1 Dec 2020, 14:16

should i change it back to 3 point to try to figure this out?

jay_s_uk · 1 Dec 2020, 14:19

I would change back to 3 points.
Just make sure they're in the same order as your M671. So front left, front right and rear middle

Vampora · 1 Dec 2020, 14:22

with the 3 point i still get this:
G32
Leadscrew adjustments made: -5.000 -5.000 -5.000, points used 3, (mean, deviation) before (-5.000, 0.000) after (-0.000, 0.000)

jay_s_uk · 1 Dec 2020, 14:24

Can you post your homeall and homez file?

Vampora · 1 Dec 2020, 14:27

homez:

; homez.g
; called to home the Z axis
;
G91
G1 Z5 F800 H2
G90
G1 X182 Y118 F2400
G30
G1 Z2 F200

homeall:

M98 P"homex.g"
M98 P"homey.g"
M98 P"homez.g"

jay_s_uk · 1 Dec 2020, 14:33

I can't see anything in there that would cause the issue.
Could you reboot the board and run the probing again?
Could you also post the updated bed file?

Vampora · 1 Dec 2020, 14:35

Updated bed.g:

M561 ; clear any existing bed transform
;G1 Z5 H2
G28 ; home
G30 P0 X2 Y2 Z-99999
G30 P1 X2 Y229 Z-99999
G30 P2 X240 Y116 Z-99999 S3
G1 X0 Y0 F5000 ; move the head to the corner (optional)

Vampora · 1 Dec 2020, 14:38

Rebooted, ran g32:

G32
Leadscrew adjustments made: -5.000 -5.000 -5.000, points used 3, (mean, deviation) before (-5.000, 0.000) after (-0.000, 0.000)

jay_s_uk · 1 Dec 2020, 14:41

Nothing else I can add on this one.
Maybe one for @Phaedrux or @dc42 to comment on?

Veti · 1 Dec 2020, 14:53

@Vampora said in Duet 3 BLTouch probing issues:

G31 X-30 Y0 Z0.75 P25 ; Set the offsets for the bltouch

change to P1000
P25 could be triggered by interference.

Vampora · 1 Dec 2020, 15:05

@Veti said in Duet 3 BLTouch probing issues:

@Vampora said in Duet 3 BLTouch probing issues:

G31 X-30 Y0 Z0.75 P25 ; Set the offsets for the bltouch

change to P1000
P25 could be triggered by interference.

No change
G32
Leadscrew adjustments made: -5.000 -5.000 -5.000, points used 3, (mean, deviation) before (-5.000, 0.000) after (-0.000, 0.000)

Vampora · 1 Dec 2020, 16:53

I just want to make sure..... does anyone think it is the bltouch not being v3.1? I'm debating ordering one since I don't have one, but my gut tells me that is not the issue.

Veti · 1 Dec 2020, 16:56

@Vampora said in Duet 3 BLTouch probing issues:

M558 P9 C"^io7.in" H5 R1 F120 T6000 A5 S0.02 B1 ; Define the bltouch input on io7.in

can you change the H5 to H6 and see if the result changes?