need Guru on duet 3 mini5 using stall guard/sensor less homing

A Former User

This post is deleted!

oliof

@Arnold_R_Clark no, you are absolutely right. Simple microswitches are far superior to sensorless homing in ease of configuration, repeatability, and reliability. I have so far spent more time dealing with weird behavior of the sensorless homing setup I am running purely to be able to show how it would work for those that insist, than it would have been to order microswitches, wait a week for them to arrive, and fitting them -- including the wait time I guess.

moth4017

@arnold_r_clark hi I do agree with you, i had 3 micro switches on the z axis but I needed the inputs for other functions and as the x an y axis work fine 100 % after the first homing , I thought it was going to become an easy exercise..... yes I could get an extension board but progress of stepper drivers and software can be archived . I'm not one to give up so I have persevered for 3 versions of software and a lot of reading and testing I'm sure at some point it will be as reliable as the X and Y. Wish me luck and a few more beers ..

pro3d

@oliof

The thing is I am running stalldetect homing on all 5 axis on the same printer flawlessly. I mean its bonkers! The difference is I run the Duet 2 wifi + Duex 5 as is TMC 2660 drivers. I still find it strange that the TMC 2209 drivers act so different

oliof

The 2660s do StallGuard2 in SpreadCycle, the 2209s do StallGuard4 in StealthChop. They work differently, so it's not a super big surprise that they need specific tuning.

moth4017

@dc42

hi any thoughts on how i can track the homing issues ?

moth4017

No more Gurus out there playing with the Duet 3 mini5 tmc2209

infiniteloop

@moth4017 Guru meditation …

moth4017

@infiniteloop tried for 6 months ... its not working . but ever hopeful

danielkrah

@moth4017
this is my config and it works nice

; Configuration file for Duet 3 Mini 5+ (firmware version 3.3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.10 on Mon May 02 2022 10:42:59 GMT+0200 (Mitteleuropäische Sommerzeit)

; General preferences
G90                                          ; send absolute coordinates...
M83                                          ; ...but relative extruder moves
M550 P"Bear 2.1 Duet3d mini5+"                             ; set printer name
M918 P1 E4 F2000000                          ; configure direct-connect display


; Network
M552 P192.168.178.148 S1                     ; enable network and set IP address
M553 P255.255.255.0                          ; set netmask
M554 P192.168.178.1                          ; set gateway
M586 P0 S1 C"*"                                  ; enable HTTP
M586 P1 S0                                   ; disable FTP
M586 P2 S0                                   ; disable Telnet

; Drives
M569 P0.0 S0 D3 V100                          ; x  physical drive 0.0 goes forwards
M569 P0.1 S1 D3 V100                          ; y  physical drive 0.1 goes forwards
;M569 P0.0 S0 D3 V40                          ; x  physical drive 0.0 goes forwards
;M569 P0.1 S1 D3 V40                          ; y  physical drive 0.1 goes forwards
M569 P0.2 S0 D3 V0                           ; z1 physical drive 0.2 goes forwards
M569 P0.3 S0 D3 V0                           ; z2 physical drive 0.3 goes forwards
M569 P0.4 S1 D3                              ; e  physical drive 0.4 goes forwards was d2
M584 X0.0 Y0.1 Z0.2:0.3 E0.4                 ; set drive mapping
; z axis compensation
M671 X-36.5:289.3 Y105:105 S1.75	
M350 X16 Y16 Z16 E16 I1                      ; configure microstepping with interpolation
M92 X100.00 Y100.00 Z400.00 E398.00          ; set steps per mm

;M566 X360.0 Y360.0 Z360.0 E360.0             ; set maximum instantaneous speed changes (mm/min) Worked with vibrations
;M566 X360.0 Y360.0 Z360.0 E360.0             ; set maximum instantaneous speed changes (mm/min)
M566 X900.0 Y900.0 Z60.0 E3000.0 P1             ; set maximum instantaneous speed changes (mm/min)
;M566 X900 Y900 Z60 E3000 P1
M203 X9000.00 Y9000.00 Z1800.00 E4800.00     ; set maximum speeds (mm/min)
;M203 X15000.00 Y15000.00 Z1800.00 E4800.00     ; set maximum speeds (mm/min)
M201 X2500.00 Y2500.00 Z100.00 E10000.00     ; set accelerations (mm/s^2)
;M201 X8000.00 Y8000.00 Z100.00 E10000.00     ; set accelerations (mm/s^2)
M203 X9000 Y9000 Z600 E20000 				; Sets the maximum feedrates that your machine can do in mm/min
;M203 X15000 Y15000 Z600 E20000 				; Sets the maximum feedrates that your machine can do in mm/min

;M566 X360.0 Y360.0 Z360.0 E360.0             ; set maximum instantaneous speed changes (mm/min)
;M566 X520.0 Y520.0 Z360.0 E360.0             ; set maximum instantaneous speed changes (mm/min)
;M203 X12000.00 Y12000.00 Z1800.00 E4800.00     ; set maximum speeds (mm/min)
;M201 X2500.00 Y2500.00 Z100.00 E10000.00     ; set accelerations (mm/s^2)
;M201 X3500.00 Y3500.00 Z250.00 E10000.00 
;M201 X4500.00 Y4500.00 Z250.00 E10000.00 
;M906 X920 Y990 Z800 E1050 I100               ; set motor currents (mA) and motor idle factor in per cent
M906 X920 Y1050 Z800 E1050 I100               ; set motor currents (mA) and motor idle factor in per cent
M564 H0                                                ; allow unhomed movement
M84 S30                                      ; Set idle timeout

; Axis Limits
M208 X0 Y-4 Z0 S1                            ; set axis minima
M208 X250 Y210 Z200 S0                       ; set axis maxima

; Endstops
M574 X1 S3                                   ; configure sensorless endstop for low end on X
M574 Y1 S3                                   ; configure sensorless endstop for low end on Y
M574 Z1 S2                                   ; configure Z-probe endstop for low end on Z

M915 X S30 H150 R0
;M915 Y S30 H150 R0
M915 Y S65 H150 R0



; Z-Probe
;M558 P1 C"io3.in+io3.out" H5 F120 T6000      ; set Z probe type to unmodulated and the dive height + speeds
;G31 P500 X0 Y0 Z2.5                          ; set Z probe trigger value, offset and trigger height
;M557 X15:215 Y11:195 S20                     ; define mesh grid

; Z-Probe PINDA
M574 Z1 S2 ;  Above at EndstopsSet endstops controlled by probe
;M558 P5 C"io3.in" I1 H0.7 F1000 T6000 A20 S0.005 ; PINDA
M558 P5 C"io3.in" I1 H1.0 F1000 T8000 A20 S0.005 ; PINDA H dive height old
M558 P5 C"io3.in" I1 H1.4 F1000 T8000 A20 S0.005 ; PINDA H dive height
;M558 P5 C"io3.in" I1 H1 F1000 T6000 A20  ; PINDA
;M558 P5 C"io3.in" I1 H1.5 F600 T8000 A20 S0.03    ; PINDA

M308 S2 P"temp2" A"PINDA" Y"thermistor" T100000 B3950
;G31 P1000 X23 Y5 Z0.837	                 ; PEI Sheet Offset C0.0010 S20 H2	original
;G31 P1000 X23 Y5 Z0.870	                 ; PEI Sheet Offset C0.0010 S20 H2	
;G31 P1000 X23 Y5 Z0.855	                 ; PEI Sheet Offset C0.0010 S20 H2	
;G31 P1000 X23 Y5 Z1.315 					; Textured Sheet Offset
;G31 P500 X23 Y5 Z0.630  					;trigger height Octoprint sheet
;G31 P1000 X23 Y12 Z1.130  					;trigger height Octoprint sheet
;G31 P1000 X23 Y5 Z0.738 S21 H2 T0.02                         			; Nozzle offset - Powder Coated Sheet with temperature compensation (0.02mm/°C)
;G31 P1000 X23 Y5 Z1.130 S21 H2 T0.02                         			; Nozzle offset - Zirflex.  Powder Coated Sheet with temperature compensation (0.02mm/°C)
;G31 P1000 X23 Y5 Z1.06 S21 H2 T0.02                         			; Nozzle offset - Satin Powder Coated Sheet with temperature compensation (0.02mm/°C)
;M557 X24:221 Y10:195 P3                     ; Define mesh grid
M557 X36:244 Y14:208 P5                     ; Define mesh grid
;M557 X12:220 Y5:197 P3                     ; Define mesh grid
; ##### Z-Probe Settings for PINDA 2
;M558 P5 C"io2.in" I1 H1 F1000 T6000 A3              				; Prusa PindaV2 Endstop
;M308 S2 P"temp2" A"Pinda V2" Y"thermistor" T100000 B3950      		; Prusa PindaV2 Thermistor

M376 H5																; Fade height 5mm


; Heaters
M308 S0 P"temp0" A"MK52" 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 B0 S1.00 R0.22                            ; disable bang-bang mode for the bed heater and set PWM limit 21s for 5 degrees
M140 H0                                      ; map heated bed to heater 0
M143 H0 S120                                 ; set temperature limit for heater 0 to 120C
M308 S1 P"temp1" A"Volcano" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin temp1
M950 H1 C"out2" T1                           ; create nozzle heater output on out2 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"out5" Q100                          ; create fan 0 on pin out3 and set its frequency
M106 P0 C"Part Cooling" S0 H-1                               ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"out6" Q500                         ; create fan 1 on pin out4 and set its frequency
M106 P1 C"Revo Fan" S255 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
M556 S100 X0,586

; Miscellaneous
M501                                         ; load saved parameters from non-volatile memory
T0        ; select first tool


; Default config.g template for DuetPi
; Replace this with a proper configuration file (e.g from https://configtool.reprapfirmware.org)

; Display initial welcome message
;M291 P"Please go to <a href=""https://www.duet3d.com/StartHere"" target=""_blank"">this</a> page for further instructions on how to set it up." R"Welcome to your new Duet 3!" S1 T0
M98 P"mksmini12864.g"
M98 P"/sys/surface.g"
;G4 S30
;M999

moth4017

@danielkrah
Hi are you using sensor less homing on your Z access?

oliof

@moth4017 oh you're asking on sensorless for Z? That's quite likely not going to work since unless you're taking special precautions a) you can't move the Z fast enough b) your print head has to be super rigid so it doesn't just flex when it hits the print bed c) you'll need a rigid print bed that doesn't care about getting hit with the weight of the full gantry.

And even then, the lack of precision on sensorless homing really doesn't make it suitable for Z.

moth4017

@oliof Hi i can move my Z very fast at 10000mm/s if i want too but not recommended my Z axis is on 4:1 gear box belt driven so speed not an issue. Im not homing at the print head but at the base of the printer against end stops.

oliof

@moth4017 the best way forward is still to add two microswitches there. If you really insist, we'd need to see some pictures of the setup and your config.g and homez.g

moth4017

@oliof hi set up is 3 belt drives config and homing files at stat of thread.

oliof

@moth4017

H parameter in M915 should be set to the steps/mm for the Z axis which seems to be 320?
lines 19/23 in home_max_z is probably supposed to be a G4 call, not a G1 call.
Your M915s may need to have R0 rather than R1 (at least that's working for me).
you could replace the acceleration changes (line 32 etc.) by defining M201.1 in config.g with the special move accelerations.
line 41 should not be required.

moth4017

@oliof

Thanks for the input , tried all of your suggestions

changing the H value didnt seem to have much impact
changed the G1 to G4 ( my mistake )
R0 and R1 did try it but it should not make a difference
M201.1 it thought this had fixed it but on the 14th try failed to move front left stepper
will try tweeking a few values to see if i can make it more reliable

oliof

@moth4017 since your Z steppers are geared, you may run into issues there, so the H value might need to be adjusted accordingly

moth4017

@oliof
i have thought about the gearing but the stepper motor is still doing the same amount of steps , but the back EMF generated may happen sooner as there is more torque required, so maybe thats why the M201.1 was a little more reliable

SputnikOC3d

@moth4017 - whats not working ?