DWC Z - Axis Movement off by Factor 10

Frederik · 19 Nov 2020, 12:18

Hello together,

I just finished my very first 3d Printer build.
Its a 400x400x400 CoreXY Kit from Ratrig.

it´s running a duet 3 board with a Raspberry 3b+ with the original SD Image from Duet.

I Updated the Reprap Firmware to 3.1.1 and got some Problems with the configuration.

I don´t know if it is in the right Category.

i want to configure the steps per mm, as I noticed that the steps in the DWC are off by the Factor of 10 for the Z-Axis movement.

I use 0.9° Stepper on X, Y, and E.
and at the moment 1.8° Stepper on the triple Z Spindel Motors (i will upgrade these to 0.9° Next Week )

I used the Web Config Tool for my first Tests.
When I am measuring the movement distances, X, Y, and E are really spot on, but the Z Steps are off by Factor 10.

when i drive 0.01mm -> it moves 0.1
when i drive 0.1mmm -y it moves 1mm
and so on....

I used Standard M8 Spindles with I believe 1.25 Pitch
I started with 2560 Steps per mm with x16 Microstepping + interpolation.

If i increase the steps to like 4500... it's not really a difference.

because it is my first build, I don't know what to do next to solve this problem. ;(

i also tried the individual z-axis bed leveling, but I don't know if it's funktioning working properly and using the actual measured values.

And my Last Problem:

How can I get the Duet Laser Filament Sensor to Pause the Print when it's detecting a Problem?

I only found in the duzoki the following line:

M591 D0 P5 C"e0_stop" R40:120 E3.0 S0 ; Duet3D laser sensor for extruder drive 0, connected to endstop input 3 (E0), tolerance 40 to 120%, 3mm comparison length, disabled

Thanks a lot in Advance

Regards
Frederik

Here a my config Files: config.g, bed.g, homex.g , homey.g, homez.g

My Config .g :

; Configuration file for Duet 3 (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.1.7 on Wed Nov 18 2020 18:04:17 GMT+0100 (Mitteleuropäische Normalzeit)

; General preferences

G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Duet 3" ; set printer name
M669 K1 ; switch to CoreXZ mode and multiply motor movements by 3 for the Z axis

; Drives
M569 P0.0 S0 ; physical drive 0.0 goes backwards
M569 P0.1 S0 ; physical drive 0.1 goes backwards
M569 P0.2 S0 ; physical drive 0.2 goes backwards
M569 P0.3 S0
M569 P0.4 S0
M569 P0.5 S1 ; physical drive 0.5 goes forwards
M584 X0.1 Y0.0 Z0.2:0.3:0.4 E0.5 ; set drive mapping
M671 X425:200:-25 Y240:-25:240 S1 P1.25 ; leadscrews at front left, rear middle and front right with 1mm per screw compensation

; Movement Parameters

M350 X16 Y16 Z16 E16 I1 ; configure microstepping without interpolation
M92 X160.00 Y160.00 Z4079.68 E873.08 ; set steps per mm
M566 X900.00 Y900.00 Z12.00 E120.00 ; set maximum instantaneous speed changes (mm/min)
M203 X12000.00 Y12000.00 Z1800.00 E1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z30.00 E250.00 ; set accelerations (mm/s^2)
M906 X1800 Y1800 Z800 E1000 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 X400 Y400 Z385 S0 ; set axis maxima

; Endstops
M574 X2 S1 P"!io1.in" ; configure active-high endstop for high end on X via pin !io1.in
M574 Y1 S1 P"!io0.in" ; configure active-high endstop for low end on Y via pin !io0.in
M574 Z2 S2 ; configure Z-probe endstop for low end on Z

; Duet Laser Filament Sensor

M591 D0 P5 C"io3.in" R40:120 E3.0 S1 ; Duet3D laser sensor for extruder drive 0, connected to IO 3,
tolerance 40 to 120%, 3mm comparison length, enabled

M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
M92 X160.00 Y160.00 Z2560.00 E837.02 ; set steps per mm
M566 X900.00 Y900.00 Z12.00 E120.00 ; set maximum instantaneous speed changes (mm/min)
M203 X12000.00 Y12000.00 Z1800.00 E1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z30.00 E250.00 ; set accelerations (mm/s^2)
M906 X1800 Y1800 Z1000 E1200 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 X400 Y400 Z400 S0 ; set axis maxima

; Endstops
M574 X2 S1 P"!io1.in" ; configure active-high endstop for high end on X via pin !io1.in
M574 Y1 S1 P"!io0.in" ; configure active-high endstop for low end on Y via pin !io0.in
M574 Z1 S2 ; configure Z-probe endstop for low end on Z

; Z-Probe
M950 S0 C"io7.out" ; create servo pin 0 for BLTouch
M558 P9 C"^io7.in" H5 F120 T6000 ; set Z probe type to bltouch and the dive height + speeds
M558 H30 ;*** Remove this line after delta calibration has been done and new delta parameters have been saved
G31 P500 X-26 Y2 Z2.5 ; set Z probe trigger value, offset and trigger height
M557 X50:400 Y50:400 S50 ; define mesh grid

; 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 B0 S1.00 ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0 ; map heated bed to heater 0
M143 H0 S200 ; set temperature limit for heater 0 to 200C
M308 S1 P"temp1" Y"thermistor" T100000 B4725 C7.06e-8 ; 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 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit

; Fans
M950 F0 C"out8" Q500 ; create fan 0 on pin out8 and set its frequency
M106 P0 C"Hotend" S1 H1 T45 ; set fan 0 name and value. Thermostatic control is turned on
M950 F1 C"!out4" Q500 ; create fan 1 on pin !out4 and set its frequency
M106 P1 C"Bauteildüse" S1 H-1 ; set fan 1 name and value. Thermostatic control is turned off

; Tools
M563 P0 S"E3D V6 0.4 Steel" D0 H1 F0:1 ; 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

M501 ; load saved parameters from non-volatile memory
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

; bed.g
; called to perform automatic bed compensation via G32
;
; generated by RepRapFirmware Configuration Tool v3.1.7 on Wed Nov 18 2020 18:04:17 GMT+0100 (Mitteleuropäische Normalzeit)

;M561 ; clear any bed transform
;G29 S2 ; Clear bed height map

;Probe 3-point
;G1 X0 Y0 Z30
M561 ; clear any bed transform
G29 S2 ; Clear bed height map
;G1 X365 Y50 F4000
;M401 ; Deploy probe - deployprobe.g
G30 P0 X340 Y240 Z-9999 P1.25 ; Front Left and compensate 1mm screw with 1.25 pitch
G30 P1 X200 Y40 Z-9999 P1.25 ; Middle Back and compensate 1mm screw with 1.25 pitch
G30 P2 X20 Y240 Z-9999 P1.25 S3 ; Front Right and compensate 1mm screw with 1.25 pitch

;M402 ; Retract Probe - retractprobe.g

; homex.g
; called to home the X-axis
;
; generated by RepRapFirmware Configuration Tool v3.1.7 on Wed Nov 18 2020 18:04:17 GMT+0100 (Mitteleuropäische Normalzeit)
G91 ; relative positioning
;G1 H2 Z5 F6000 ; lift Z relative to the current position
G1 H1 X405 F6000 ; move quickly to X-axis endstop and stop there (first pass)
G1 X-5 F6000 ; go back a few mm
G1 H1 X405 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 v3.1.7 on Wed Nov 18 2020 18:04:17 GMT+0100 (Mitteleuropäische Normalzeit)
G91 ; relative positioning
;G1 H2 Z5 F6000 ; lift Z relative to the current position
G1 H1 Y-405 F6000 ; move quickly to Y axis endstop and stop there (first pass)
G1 Y5 F6000 ; go back a few mm
G1 H1 Y-405 F360 ; move slowly to Y-axis endstop once more (second pass)
;G1 H2 Z-5 F6000 ; lower Z again
G90 ; absolute positioning

list item

; homez.g
; called to home the Z-axis
;
; generated by RepRapFirmware Configuration Tool v3.1.7 on Wed Nov 18 2020 18:04:17 GMT+0100 (Mitteleuropäische Normalzeit)
G91 ; relative positioning
G1 H2 Z5 F1800 ; lift Z relative to current position
G90 ; absolute positioning
G1 X200 Y200 F6000 ; go to first probe point
G30 ; home Z by probing the bed

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

BoA · 19 Nov 2020, 12:21

@Frederik

M92 X160.00 Y160.00 Z4079.68 E873.08 ; set steps per mm

This looks weird. What screws you have in Z ?

Frederik · 19 Nov 2020, 12:31

@BoA Standard M8 Spindles

Veti · 19 Nov 2020, 12:32

the movement sections is in your config twice

M92 X160.00 Y160.00 Z2560.00 E837.02 ; set steps per mm
this line overwrites the first line for example.

I used Standard M8 Spindles with I believe 1.25 Pitch

those are not standard. you really need to know
post the link the the product that you bought.

Veti · 19 Nov 2020, 12:33

@Frederik said in DWC Z - Axis Movement off by Factor 10:

Standard M8 Spindles

M8 Spindles have not been used in 3d printers for years because of bad results.

do you mean tr8 lead screw?

Frederik · 19 Nov 2020, 12:35

@Veti It was a complete Kit from Ratrig. There were no specifications other than M8 400mm
I will ask the manufacturer

BoA · 19 Nov 2020, 12:37

@Frederik Make a picture. will be faster.

Frederik · 19 Nov 2020, 12:38

according to the BOM:

8mm Metric ACME Lead Screw

BoA · 19 Nov 2020, 12:40

@Frederik If this is Tr8x8 with 1.9deg stepper and 16microsteps it should be 400steps/mm

Also seems movement parameters section is doubled for some reason.

Frederik · 19 Nov 2020, 12:42

Veti · 19 Nov 2020, 12:43

thats a 4 start tr8 leadscrew

it has an 8mm pitch

BoA · 19 Nov 2020, 12:44

@Veti So as I wrote, 1.9deg, 16 microsteps, 8mm pitch - 400steps/mm. Not ~4000 or 2560.

And... what kind of extruder You have that E steps/mm are so.. not a round number?

Frederik · 19 Nov 2020, 12:46

thanks a lot, i will try the new values

BoA · 19 Nov 2020, 12:46

@Frederik And cleanup You config. Seems

 M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
M92 X160.00 Y160.00 Z2560.00 E837.02 ; set steps per mm
M566 X900.00 Y900.00 Z12.00 E120.00 ; set maximum instantaneous speed changes (mm/min)
M203 X12000.00 Y12000.00 Z1800.00 E1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z30.00 E250.00 ; set accelerations (mm/s^2)
M906 X1800 Y1800 Z1000 E1200 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 X400 Y400 Z400 S0 ; set axis maxima
 
; Endstops
M574 X2 S1 P"!io1.in" ; configure active-high endstop for high end on X via pin !io1.in
M574 Y1 S1 P"!io0.in" ; configure active-high endstop for low end on Y via pin !io0.in
M574 Z1 S2 ; configure Z-probe endstop for low end on Z

is duplicated

Frederik · 19 Nov 2020, 12:51

MY other question is about the LAser FIlament Sensor:

I only Found the following Line in the dozuki for RRF 3.x

M591 D0 P5 C"e0_stop" R40:120 E3.0 S0 ; Duet3D laser sensor for extruder drive 0, connected to endstop input 3 (E0), tolerance 40 to 120%, 3mm comparison length, disabled

would this work on my duet 3 (connected to io3)

M950 J3 C"!^io3.in" ; Input 3, inverted, pullup enabled
M591 D0 P5 C"io3.in" R40:120 E3.0 S1 ; Duet3D laser sensor for extruder drive 0, connected to IO 3,
tolerance 40 to 120%, 3mm comparison length, enabled

Frederik · 19 Nov 2020, 12:52

@BoA oh, i see, thats a copy and paste error.... in my config its only once

BoA · 19 Nov 2020, 12:53

@Frederik said in DWC Z - Axis Movement off by Factor 10:

M950 J3 C"!^io3.in" ; Input 3, inverted, pullup enabled

I would remove this one.

Frederik · 19 Nov 2020, 12:58

@BoA so only this line :

M591 D0 P5 P"io3.in" R40:120 E3.0 S1

the green light flashes constantly and when i move the filament i respnds with faster blinking.

is this all i need ? no extra pause and resume command ?

BoA · 19 Nov 2020, 13:00

@Frederik Should be fine. But I am guessing when filament monitoring shows some problems pause.g is executed to pause the print.

You can check sensor status by M591 D0

Frederik · 19 Nov 2020, 13:02

@BoA my extruder Setup:

Original Bondtech BMG with a E3d Volcano with 0.4 mm micro swiss nozzle and titan heatbreak. 40W Heater and Thermistor 100K
0.9° Pancake Stepper

bedheater: 220V AC1.2 kW Keenovo Silicone Pad 400x400

	M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
	M92 X160.00 Y160.00 Z2560.00 E837.02 ; set steps per mm
	M566 X900.00 Y900.00 Z12.00 E120.00 ; set maximum instantaneous speed changes (mm/min)
	M203 X12000.00 Y12000.00 Z1800.00 E1200.00 ; set maximum speeds (mm/min)
	M201 X500.00 Y500.00 Z30.00 E250.00 ; set accelerations (mm/s^2)
	M906 X1800 Y1800 Z1000 E1200 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 X400 Y400 Z400 S0 ; set axis maxima

	; Endstops
	M574 X2 S1 P"!io1.in" ; configure active-high endstop for high end on X via pin !io1.in
	M574 Y1 S1 P"!io0.in" ; configure active-high endstop for low end on Y via pin !io0.in
	M574 Z1 S2 ; configure Z-probe endstop for low end on Z