But if the probe always meets the same bed temperature - the variance is constant right?
Thermistor is there to correct the non-constant bed temperatures to keep the same offset between 60 and 90C but I'm using only one

@dc42 Hope it is a worthwhile bother. I'm at the wits end with configuring duet for my ender 3 and pinda probe since May.

The Z offset is inconsistent and two Z axis true leveling is inconsistent as well.

• I have replaced the springs with PCABS washers.
• Probe measures at static 60C
• Z rod distances, bed size, probe to nozzle distances are correct.
• Z motor order and cabling is correct.

Please, please help

Duet software turns out to be very difficult to be made to work despite doing everything like the guides said.

Yes but as I use 60C always - It's safe dependable value. Using temperature offsets would just add another fail point and would not impact anything that is failing currently

@Phaedrux I printed a 2cm washers in PCABS and replaced the springs with them. Magnetic bed holds to the bed.

At first it worked but I started to have hardware/connection issues with temperature sensor in pinda probe. I never used temp corretion, I thought it is not available.

I always use 60C temp for homing and printing unless I use PCABS but that's not in the equation/files right now.

If at least I could home onice:

25/09/2020, 07:54:49	G28
Leadscrew adjustments made: 0.052 -0.048, points used 2, (mean, deviation) before (0.005, 0.029) after (0.000, 0.000)
Stopped at height 0.590 mm
Stopped at height 0.540 mm

Error: Homing failed
25/09/2020, 07:47:56	G28
Leadscrew adjustments made: 0.096 -0.089, points used 2, (mean, deviation) before (0.010, 0.054) after (0.000, 0.000)
Stopped at height 0.595 mm
Stopped at height 0.515 mm

Error: Homing failed
25/09/2020, 07:45:14	G28
Leadscrew adjustments made: 0.164 -0.158, points used 2, (mean, deviation) before (0.014, 0.094) after (0.000, 0.000)
Stopped at height 0.647 mm
Stopped at height 0.505 mm

Error: Homing failed
25/09/2020, 07:42:46	G28
Leadscrew adjustments made: 0.379 -0.333, points used 2, (mean, deviation) before (0.048, 0.209) after (0.000, 0.000)
Stopped at height 0.908 mm
Stopped at height 0.675 mm

I also have a trouble with changing Z offset, one week it's 2mm lower and after few prints it goes 2mm up while I'm consistent with the procedure and it is persistent on restarts.

Full config.g

; General preferences
G90                                            ; send absolute coordinates...
M83                                            ; ...but relative extruder moves
M550 P"Ender1"                                 ; set printer name

; Network
;M552 S0                                        ; disable network

; Drives
M569 P0 S0 D3 ;T0.1:0.1:0.02:0.02                  ; physical drive 0 goes backwards using TMC220x driver timings
M569 P1 S0 D3 ;T0.1:0.1:0.02:0.02                  ; physical drive 1 goes backwards using TMC220x driver timings
M569 P2 S1 D3 ;T0.1:0.1:0.02:0.02                  ; physical drive 2 goes forwards using TMC220x driver timings
M569 P3 S0 ;T0.1:0.1:0.02:0.02                  ; physical drive 3 goes backwards using TMC220x driver timings
M569 P4 S1 D3 ;T0.1:0.1:0.02:0.02                  ; physical drive 3 goes backwards using TMC220x driver timings
;M569 P0 S0                                     ; physical drive 0 goes forwards using default driver timings
;M569 P1 S0                                     ; physical drive 1 goes forwards using default driver timings
;M569 P2 S1                                     ; physical drive 2 goes forwards using default driver timings
;M569 P3 S0                                     ; physical drive 3 goes forwards using default driver timings

M584 X0 Y1 Z2:4 E3                               ; set drive mapping
M350 X16 Y16 Z16 E32 I1 					   ; configure microstepping with interpolation 
M92 X80.00 Y80.00 Z400 E194.68                   ; set steps per mm 210.00 without m350
M566 X1200.00 Y1200.00 Z24.00 E300.00            ; set maximum instantaneous speed changes (mm/min)
M203 X9000.00 Y9000.00 Z180.00 E6000.00        ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z100.00 E5000.00            ; set accelerations (mm/s^2)
M906 X800 Y800 Z800 E1000 I30                   ; set motor currents (mA)
M572 D0 S0.42                                 ; set pressure advance for direct drive
M84 S30                                        ; Set idle timeout

;dual z axis limits                             ;TO BE CORRECTED
M671 X-30:260 Y115:115 S1                        ; leadscrews at left (connected to Z) and right (connected to E1) of X axis
;M208 X45:195 Y30:185                            ; X carriage moves from -5 to 205, Y bed goes from 0 to 200

; Axis Limits
M208 X0 Y0 Z0 S1                               ; set axis minima
M208 X252 Y230 Z230 S0                         ; set axis maxima

; Endstops
M574 X1 S1 P"xstop"                            ; configure active-high endstop for low end on X via pin xstop
M574 Y1 S1 P"ystop"                            ; configure active-high endstop for low end on Y via pin ystop
M574 Z1 S1 P"zstop"                            ; configure active-high endstop for low end on Z via pin zstop

; Z-Probe PINDA
M558 P5 C"probe" H3 F120 T6000 A20 S0.005     ; PINDA
;M308 S2 P"e1temp" A"PINDA" Y"thermistor" T100000 B3950 ; PINDA TEMP OK
G31 P100 X-35 Y-4 ;Z0.540
M557 Y20:220 X19:215 P9                        ; define mesh grid OK



; Heaters
M140 H0                                        ; remap heated bed to heater 0
M308 S0 P"bedtemp" Y"thermistor" T100000 B4092 ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bed" T0                              ; create bed heater output on bed and map it toensor 0
M143 H0 S110                                    ; set temperature limit for heater 0 to 150C
M307 H0 A149.8 C505.7 D0.3 S1.0 V0.0 B0      ; disable bang-bang mode for the nozzle heater and set PWM limit, update auto bed tuning M303 H0 S90

M308 S1 P"e0temp" Y"thermistor" T100000 B4092  ; 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
M143 H1 S265                                   ; set temperature limit for heater 1 to 275C
M307 H1 A348.1 C142.2 D5.1 S1.0 V0.0 B0        ; disable bang-bang mode for the nozzle heater and set PWM limit, update auto bed tuning M303 H1 S260


; 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"e1heat" Q500                         ; create fan 1 on pin e1heat and set its frequency
M106 P1 H1 T40 S255                           ; set fan 1 value. Speed is set to 255. Thermostatic control is off




; Tools
M563 P0 D0 H1 F0                               ; define tool 0
;G10 P0 X0 Y-13 Z-0.80                                ; set tool 0 axis offsets
G10 P0 X0 Y-13 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

; Miscellaneous
T0                                             ; select first tool

full homeall.g

G91                     ; relative positioning
G1 H2 Z5 F6000          ; lift Z relative to current position
M190 S60           ; set temp to 60
G1 H1 X-240 Y-240 F3000 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X5 Y5 F6000       ; go back a few mm
G1 H1 X-240 Y-240 F240  ; move slowly to X and Y axis endstops once more (second pass)
G1 H2 Z5 F6000          ; lift Z relative to current position
G1 X160 Y115 F3000      ; put head over the centre of the bed, or wherever you want to probe
G30 F240                ; lower head, stop when probe triggered and set Z to trigger height
G90                     ; back to absolute mode
G1 H2 X0 Y0 Z20 F6000   ; Go to home position
G32
G31 Z0.498 ;Z0.540
;G29 S1
G28 Z

full bed.g

G30 P0 X20 Y115 Z-99999 ; probe near a leadscrew, half way along Y axis
G30 P1 X190 Y115 Z-99999 S2 ; probe near a leadscrew and calibrate 2 motors
G28 Z


G90 ; absolute mode
G1 Z5
G1 X40 Y115 F6000 ; put head over the mid left corner
G1 Z0
G91 ; relative mode
G1 H2 Z5 F6000 ; raise head 4mm to ensure it is above the Z probe trigger height
G90 ; back to absolute mode
G30 S-1; lower head, stop when probe triggered and report the value

G90 ; absolute mode
G1 Z5
M564 S0
G1 X250 Y115 F6000 ; put head over the mid right corner
M564 S1
G91 ; relative mode
G1 H2 Z5 F6000 ; raise head 4mm to ensure it is above the Z probe trigger height
G90 ; back to absolute mode
G30 S-1; lower head, stop when probe triggered and report the value

@Phaedrux said in G32 Dual Z axis constant 0.6mm off-level difference:

You should set the trigger height in config.g and leave it there. You haven't posted your config so I don't know what your trigger height is set there, but if it's different than 0.540 then you're going to have some problems.

I started getting fine leveling results precisely because I moved it from config.g so G32 works without it. How do I get better measurements with Z offset in there? (they were scattered and inconsistent. I got the motors in the right order.

At least now they get more even but still I need to home it few times

25/09/2020, 07:54:49	G28
Leadscrew adjustments made: 0.052 -0.048, points used 2, (mean, deviation) before (0.005, 0.029) after (0.000, 0.000)
Stopped at height 0.590 mm
Stopped at height 0.540 mm

Error: Homing failed
25/09/2020, 07:47:56	G28
Leadscrew adjustments made: 0.096 -0.089, points used 2, (mean, deviation) before (0.010, 0.054) after (0.000, 0.000)
Stopped at height 0.595 mm
Stopped at height 0.515 mm

Error: Homing failed
25/09/2020, 07:45:14	G28
Leadscrew adjustments made: 0.164 -0.158, points used 2, (mean, deviation) before (0.014, 0.094) after (0.000, 0.000)
Stopped at height 0.647 mm
Stopped at height 0.505 mm

Error: Homing failed

After I push emergency stop and run homeall.g

G91                     ; relative positioning
G1 H2 Z5 F6000          ; lift Z relative to current position
M190 S60           ; set temp to 60
G1 H1 X-240 Y-240 F3000 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X5 Y5 F6000       ; go back a few mm
G1 H1 X-240 Y-240 F240  ; move slowly to X and Y axis endstops once more (second pass)
G1 H2 Z5 F6000          ; lift Z relative to current position
G1 X160 Y115 F3000      ; put head over the centre of the bed, or wherever you want to probe
G30 F240                ; lower head, stop when probe triggered and set Z to trigger height
G90                     ; back to absolute mode
G1 H2 X0 Y0 Z20 F6000   ; Go to home position
G32
G31 Z0.540
G29 S1
G28 Z

I get fine results:

G28
Stopped at height 0.815 mm
Stopped at height 0.690 mm
Leadscrew adjustments made: 0.139 -0.349, points used 2, (mean, deviation) before (-0.088, 0.143) after (-0.000, 0.000)
Stopped at height 0.730 mm
Stopped at height 0.770 mm

But it is ridiculous. Limiting use.