Homing issues on a Delta with Duet 2

[Meki]

Hi there!

I've recently joined the duet fanclub as an owner, and I really do like the adventure that this board has taken me on!
The patient is an FLSUN QQ-S Pro, and after getting the wiring done, work on the proper configuration has started, and of course, being a newbie, I've hit a roadblock I can't seem to get over...

The basic problem is that when homing, the endstops don't stop the tower from pushing forward and tries to keep going. Here's the twist: according to M119, all the endstops are in their proper state and when I manually trigger each endstop and M119 again, the changes are reflected. According to M119 every endstop is in working order.

I'm happy to post any and all config files if that helps!

[Phaedrux]

Post your config.g and homedelta.g

[Meki]

Thank you for looking into this

The config came from the online configuration tool, delta parameters came from an "old" mks_robin config file for the QQ-S.

Only the Z-probe switch has been inverted through manual editing.

The M119 log:

10/19/2020, 3:58:23 PM: m119: Endstops - X: not stopped, Y: not stopped, Z: not stopped, Z probe: not stopped
10/19/2020, 3:58:34 PM: m119: Endstops - X: not stopped, Y: not stopped, Z: at min stop, Z probe: not stopped
10/19/2020, 3:58:43 PM: m119: Endstops - X: at min stop, Y: not stopped, Z: not stopped, Z probe: not stopped
10/19/2020, 3:58:52 PM: m119: Endstops - X: not stopped, Y: at min stop, Z: not stopped, Z probe: not stopped
10/19/2020, 3:59:13 PM: m119: Endstops - X: not stopped, Y: at min stop, Z: not stopped, Z probe: at min stop

config.g

; Configuration file for Duet WiFi (firmware version 2.03)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Mon Oct 19 2020 11:02:18 GMT+0200 (Central European Summer Time)
 
; General preferences
G90                                                ; send absolute coordinates...
M83                                                ; ...but relative extruder moves
M550 P"Legionare"                                  ; set printer name
M665 R130 L280 B130 H370                           ; Set delta radius, diagonal rod length, printable radius and homed height
M666 X0 Y0 Z0                                      ; put your endstop adjustments here, or let auto calibration find them
 
; Network
M552 S1                                            ; enable network
M586 P0 S1                                         ; enable HTTP
M586 P1 S0                                         ; disable FTP
M586 P2 S0                                         ; disable Telnet
 
; Drives
M569 P0 S0                                         ; physical drive 0 goes forwards
M569 P1 S0                                         ; physical drive 1 goes forwards
M569 P2 S0                                         ; physical drive 2 goes forwards
M569 P3 S0                                         ; physical drive 3 goes forwards
M584 X0 Y1 Z2 E3                                   ; set drive mapping
M350 X16 Y16 Z16 E16 I1                            ; configure microstepping with interpolation
M92 X100.00 Y100.00 Z100.00 E417.00                ; set steps per mm
M566 X1200.00 Y1200.00 Z1200.00 E1200.00           ; set maximum instantaneous speed changes (mm/min)
M203 X12000.00 Y12000.00 Z12000.00 E12000.00       ; set maximum speeds (mm/min)
M201 X1000.00 Y1000.00 Z1000.00 E1000.00           ; set accelerations (mm/s^2)
M906 X1000 Y1000 Z1000 E800 I30                    ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                            ; Set idle timeout
 
; Axis Limits
M208 Z0 S1                                         ; set minimum Z
 
; Endstops
M574 X1 Y1 Z1 S1                                   ; set active low and disabled endstops
 
; Z-Probe
M558 P4 I1 H5 F120 T6000                              ; set Z probe type to switch and the dive height + speeds
G31 P500 X0 Y0 Z16.2                               ; set Z probe trigger value, offset and trigger height
M557 R85 S20                                       ; define mesh grid
 
; Heaters
M305 P0 T100000 B4138 R4700                        ; set thermistor + ADC parameters for heater 0
M143 H0 S120                                       ; set temperature limit for heater 0 to 120C
M305 P1 T100000 B4138 R4700                        ; set thermistor + ADC parameters for heater 1
M143 H1 S260                                       ; set temperature limit for heater 1 to 260C
 
; Fans
M106 P0 C"Effector" S0 I0 F500 H-1                 ; set fan 0 name, value, PWM signal inversion and frequency. Thermostatic control is turned off
 
; Tools
M563 P0 S"HotEnd" 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
 
; 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

homedelta.g

; homedelta.g
; called to home all towers on a delta printer
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Mon Oct 19 2020 11:02:18 GMT+0200 (Central European Summer Time)
G91                        ; relative positioning
G1 H1 X455 Y455 Z455 F1800 ; move all towers to the high end stopping at the endstops (first pass)
G1 H2 X-5 Y-5 Z-5 F1800    ; go down a few mm
G1 H1 X10 Y10 Z10 F360     ; move all towers up once more (second pass)
G1 Z-5 F6000               ; move down a few mm so that the nozzle can be centred
G90                        ; absolute positioning
G1 X0 Y0 F6000             ; move X+Y to the centre

[Phaedrux]

@Meki said in Homing issues on a Delta with Duet 2:

; Endstops M574 X1 Y1 Z1 S1 ; set active low and disabled endstops

This should be M574 X2 Y2 Z2 S1 for high end endstops.

If you're a new user to Duet and this is a new build, it might be a good time to jump to RRF v3.1.1 since you're getting a fresh config from the config tool anyway.

Updating the firmware is easy as uploading two zip files.

https://github.com/Duet3D/RepRapFirmware/releases/download/3.0/Duet2and3Firmware-3.0.zip

https://github.com/Duet3D/RepRapFirmware/releases/download/3.1.1/Duet2and3Firmware-3.1.1.zip

First upload the 3.0 zip file as is without extracting. Then after it updates, do the same for 3.1.1 zip file.

Then you can upload the config file set from the web tool for RRF3.

[Veti]

@Meki said in Homing issues on a Delta with Duet 2:

M305 P0 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 0
M305 P1 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 1

your thermistor settings are wrong. look up the correct beta value in your thermistor documentation.

[Meki]

@Phaedrux said in Homing issues on a Delta with Duet 2:

M574 X2 Y2 Z2 S1

Well, I've upgraded to RRF 3, had a little issue with the iap4e.bin file, bot solved it... I'm now running RRF 3.1.1, but still the grinding is there on the endstops and my z-probe has stopped producing any results... it's locked to at min stop... at least the endstops say at max stop when triggered manually...

So, z-probe broke, and the towers still want to blow off...

I'm guessing that the z-probe pin now expects to be on the z-probe-in pin instead of e0_stp as in the RRF2...

@Veti Thanks, but I've got no idea what type of thermistor is in place... FLSUN has been making changes and documentation is scarce to say the least... at least it's a cartridge type instead of the original bare glass bead version...

[jay_s_uk]

Can you post your updated config.g and homedelta.g please

[Veti]

https://github.com/MarlinFirmware/Configurations/blob/import-2.0.x/config/examples/delta/FLSUN/QQ-S/Configuration.h

marlin says its
1 : 100k thermistor - best choice for EPCOS 100k (4.7k pullup)

[Meki]

@jay_s_uk
config.g

; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Tue Oct 20 2020 07:47:37 GMT+0200 (Central European Summer Time)
 
; General preferences
G90                                                ; send absolute coordinates...
M83                                                ; ...but relative extruder moves
M550 P"Legionare"                                  ; set printer name
M665 R130 L280 B130 H370                           ; Set delta radius, diagonal rod length, printable radius and homed height
M666 X0 Y0 Z0                                      ; put your endstop adjustments here, or let auto calibration find them
 
; Network
M552 S1                                            ; enable network
M586 P0 S1                                         ; enable HTTP
M586 P1 S0                                         ; disable FTP
M586 P2 S0                                         ; disable Telnet
 
; Drives
M569 P0 S0                                         ; physical drive 0 goes backwards
M569 P1 S0                                         ; physical drive 1 goes backwards
M569 P2 S0                                         ; physical drive 2 goes backwards
M569 P3 S0                                         ; physical drive 3 goes backwards
M584 X0 Y1 Z2 E3                                   ; set drive mapping
M350 X16 Y16 Z16 E16 I1                            ; configure microstepping with interpolation
M92 X100.00 Y100.00 Z100.00 E417.00                ; set steps per mm
M566 X1200.00 Y1200.00 Z1200.00 E1200.00           ; set maximum instantaneous speed changes (mm/min)
M203 X12000.00 Y12000.00 Z12000.00 E12000.00       ; set maximum speeds (mm/min)
M201 X1000.00 Y1000.00 Z1000.00 E1000.00           ; set accelerations (mm/s^2)
M906 X1000 Y1000 Z1000 E800 I30                    ; set motor currents (mA) and motor idle factor in per cent
M84 S30                                            ; Set idle timeout
 
; Axis Limits
M208 Z0 S1                                         ; set minimum Z
 
; Endstops
M574 X2 S1 P"xstop"                                ; configure active-high endstop for high end on X via pin xstop
M574 Y2 S1 P"ystop"                                ; configure active-high endstop for high end on Y via pin ystop
M574 Z2 S1 P"zstop"                                ; configure active-high endstop for high end on Z via pin zstop
 
; Z-Probe
M558 P4 C"^zprobe.in" I1 H5 F120 T6000             ; set Z probe type to switch and the dive height + speeds
G31 P500 X0 Y0 Z16.2                               ; set Z probe trigger value, offset and trigger height
M557 R85 S20                                       ; 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
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
 
; Fans
M950 F0 C"fan0" Q500                               ; create fan 0 on pin fan0 and set its frequency
M106 P0 C"Effector" S0 H-1                         ; set fan 0 name and value. Thermostatic control is turned off
 
; Tools
M563 P0 S"HotEnd" 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
 
; 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
T0                                                 ; select first tool

homedelta.g

; homedelta.g
; called to home all towers on a delta printer
;
; generated by RepRapFirmware Configuration Tool v3.1.4 on Tue Oct 20 2020 07:47:37 GMT+0200 (Central European Summer Time)
G91                        ; relative positioning
G1 H1 X455 Y455 Z455 F1800 ; move all towers to the high end stopping at the endstops (first pass)
G1 H2 X-5 Y-5 Z-5 F1800    ; go down a few mm
G1 H1 X10 Y10 Z10 F360     ; move all towers up once more (second pass)
G1 Z-5 F6000               ; move down a few mm so that the nozzle can be centred
G90                        ; absolute positioning
G1 X0 Y0 F6000             ; move X+Y to the centre

@Veti Thanks! I mean it!

[jay_s_uk]

Nothing looks incorrect in your homing files so I don't see why the endstops aren't triggering correctly.

In the M558, P4 is no longer supported and P5 should be used instead.
https://duet3d.dozuki.com/Wiki/Gcode#Section_M558_in_RepRapFirmware_Num_3

[Meki]

@jay_s_uk Z-probe is fixed, thanks!

And believe my, I'm just as baffled... M119 reports that all the endstops are in the neutral state and when I'm going around, triggering them manually M119 reports that the endstops are triggered...

[Meki]

@jay_s_uk, @Phaedrux, @Veti thanks for all the help!

After quadruple checking, it turns out that the endstops were mixed up.
Since then, everything is in working order!