IR Sensor and trigger hight

observatoer · 24 May 2020, 16:51

I can't get the IR Sensor to Z0.

Sensor is physically adjusted to be 1.5mm above nozzle. Offset -2/26.5 (x/y).
Adjusting it to 1.5mm above nozzle gives me a trigger hight of 3.14mm but shall aim for 0.5 to 2.5mm according to DC42's page. Also, the vallue shown at 3.14mm trigger is 1000.
I suspect, the probe is broken.
Any help highly appreciated.

PS: Duet3 RRF3.1.1 CoreX/Y

Phaedrux · 24 May 2020, 16:53

How do you have it setup in config.g?
What is your bed surface?

observatoer · 24 May 2020, 16:55

Bed surface is a Geckotech.

; Z-Probe
M558 P8 C"io3.in" H5 F120 T6000
G31 P500 X-2 Y26.42 Z3.14

Phaedrux · 24 May 2020, 16:59

@observatoer said in IR Sensor and trigger hight:

M558 P8

You should be using M558 P1 for analogue probe mode.

observatoer · 24 May 2020, 17:01

@Phaedrux Tried P1 w same result. Saw a comment from DC42 to use Mode 8 for the probe on RRF3.

Phaedrux · 24 May 2020, 17:04

Does performance change with a piece of paper on the bed surface?

observatoer · 24 May 2020, 17:05

@Phaedrux No, I already tried different surfaces and they where detected equally.

Phaedrux · 24 May 2020, 17:07

so you've gone through this procedure?

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

observatoer · 24 May 2020, 17:08

@Phaedrux Yes, several times to confirm doing it right.

Phaedrux · 24 May 2020, 17:11

So what exactly is happening incorrectly? I'm not sure I understand from your first post.

When you use G30 s-1 to measure the trigger height, what value do you get?
When you use that value in G31 Z, are you able to move the nozzle to touch the bed at z0?

observatoer · 24 May 2020, 17:16

@Phaedrux
Doing G30 S-1 gives me 3.14. Adding this to the config.g and home Z gives me Z=0, but the nozzle is esteem. 3.14mm above the bed.
If I reajust the probe hight, the same thing happens, just with different values. Higher probe, lower Z and visa versa.

1ri · 24 May 2020, 18:16

@observatoer
Considering that you have the z-probe fine Tuned and configured. You commented that you have the problem when you do the homing. Is it possible that you do not use the z-probe to set z=0 and that there is this difference of one millimeter between the z-axis sensor and the z-probe?

In my printer, with dual z axis, after home with micros witches every motor, I run a G30 command to set Z=0 with de Z-probe then I run a G32 command.

It works well for me in reprap 3.1 on a duetWifi+Duex

Phaedrux · 24 May 2020, 18:56

Please post your full config.g and homeall.g / homez.g please

observatoer · 24 May 2020, 20:16

@Phaedrux Thanks for the support! Maybe, I figured it out but nor sure about the "how".

; General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Duet 3" ; set printer name
G21 ; Work in millimetres
M575 P1 B57600 S1 ; Comms parameters for PanelDue
M669 K1 ; select CoreXY mode

; Network & Logging
M111 S0 ; Debug off
M929 P"eventlog.txt" S0 ; Start logging to file eventlog.txt

; Axis and motor configuration

M569 P0 S0 ; physical drive 0 goes backwards
M569 P1 S0 ; physical drive 1 goes backwards
M569 P2 S1 ; physical drive 2 goes forward
M569 P3 S0 ; physical drive 3 > Right goes backwards
M569 P4 S0 ; physical drive 4 > Left Front goes backwards
M569 P5 S0 ; physical drive 5 > Left Back goes backwards

M584 X1 Y2 Z3:4:5 E0 ; set drive mapping: Achtung. Z Motoren P3=Z3, P4 = Z4 und P5=Z5!! Sonst funktioniert Leveling nicht.
M350 X16 Y16 E16 I1 ; configure microstepping with interpolation
M350 Z16 I1 ; z axis isolated
M92 E830 ; set steps per mm Extruder
M92 X191.883 Y191.883 ; set steps per mm (0.9/16T=200s/mm) calibrated PLA: 190.9286
M92 Z3200 ; z axis isolated
M203 X24000 Y24000 Z900 E8000 ; set maximum speeds (mm/min)
M201 X1000 Y1000 Z40 E1300 ; set accelerations (mm/s^2)
M906 X1900 Y1900 Z1600 E650 I5 ; set motor currents (mA) and motor idle factor in per cent
M566 X1000 Y1000 Z150 E3000 ; Maximum jerk speeds mm/minute / Jubilee
M84 S600 ; Set idle timeout

;Pressure Advance
M572 D0 S0.05 ; set pressure advance for extruder 0. Direct Drive recomendation = 0.025

;Leadscrew locations
M671 X-10:-10:333 Y22.5:277.5:150 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

; Axis Limits
M208 X0 Y0 Z-2 S1 ; set axis minima
M208 X305 Y305 Z315 S0 ; set axis maxima

; Z-Probe
M558 P8 C"io3.in" H5 F120 T6000 ; Changed from Mode 1 to Mode 8 for IR / set Z probe type to unmodulated and the dive height + speeds
G31 P500 X-2 Y26.42 Z1.45 ; set Z probe trigger value, offset and trigger height (DC42)
M557 X0:295 Y0:295 S70 ; define mesh grid

; Endstops
M574 X1 S1 P"io1.in" ; configure active-high endstop for low end on X via pin io1.in
M574 Y1 S1 P"io2.in" ; configure active-high endstop for low end on Y via pin io2.in
M574 Z1 S2 ; configure Z-probe endstop for low end on Z

; Heater & Fan
M308 S0 P"temp0" A"Heat Bed" 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
M143 H0 S120 ; set temperature limit for heater 0 to 120C
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

M308 S1 P"temp1" A"Slice Hotend" Y"thermistor" T500000 B4723 C1.19622e-7 ; Slice Thermistor: 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
M143 H1 S280 ; set temperature limit for heater 1 to 280C
M307 H1 B0 S1.00 ; set bang-bang mode for heater

; Fans
M950 F0 C"out8" Q500 ; create fan 0 on pin out8 and set its frequency >> Heatsink Fan
M106 P0 S0 H1 T45 ; set fan 0 value. Thermostatic control is turned on.
M950 F1 C"out9" Q500 ; create fan 1 on pin out9 and set its frequency. >> Part Fan
;;M106 P1 S1 H-1 ; set fan 1 value. Thermostatic control is turned off
M106 P1 S1 H1 T45

;Probe points
M557 X20:275 Y30:275 P3

; 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

; Tools
M563 P0 S"Mosquito Magnum" 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

;M98 P"config-user.g" ; Load custom user config if one exists.

;M501 ; Load saved parameters from non-volatile memory

;G29 S1

; Note: you will need to tune the bed heater, and both extruder cartridges before printing.
; See the following link for more details. https://duet3d.dozuki.com/Wiki/Tuning_the_heater_temperature_control

; Custom settings are not defined

; Miscellaneous
M501 ; load saved parameters from non-volatile memory

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v2.1.8 on Sat May 16 2020 15:05:51 GMT+0200 (CEST)
G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 X-305 Y-305 F1800 ; move quickly to X or Y endstop and stop there (first pass)
G1 H1 X-305 ; home X axis
G1 H1 Y-305 ; home Y axis
G1 X5 Y5 F6000 ; go back a few mm
G1 H1 X-305 F360 ; move slowly to X axis endstop once more (second pass)
G1 H1 Y-305 ; then move slowly to Y axis endstop
G1 H1 Z-305 F360 ; move Z down stopping at the endstop
G90 ; absolute positioning

G92 Z1.60 ; Remark: Adjuted from Z0 to Z1.60 // set Z position to axis minimum (you may want to adjust this)
;G92 Z0 ; set Z position to axis minimum (you may want to adjust this)

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

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v2.1.8 on Sat May 16 2020 15:05:51 GMT+0200 (CEST)
G91 ; relative positioning
G1 H2 Z5 F300 ; lift Z relative to current position
G1 H1 Z-305 F300 ; move Z up until the endstop is triggered
;G92 Z0 ; set Z position to axis minimum (you may want to adjust this)
G92 Z1.60 ; set Z position to axis minimum (you may want to adjust this)

Phaedrux · 24 May 2020, 22:34

Your homing files are using end stops to home Z and not the probe.

 G1 H1 Z-305 F360 ; move Z down stopping at the endstop
G90 ; absolute positioning
G92 Z1.60 ; Remark: Adjuted from Z0 to Z1.60 // set Z position to axis minimum (you may want to adjust this)

These sections should be replaced with

 G1 X100 Y100 F6000 ; move probe to center of the bed. Adjust as needed.
G30 ; probe the bed to establish z0

observatoer · 25 May 2020, 05:02

@Phaedrux YES! This is the solution. Thank you very much

	G1 H1 Z-305 F360 ; move Z down stopping at the endstop
	G90 ; absolute positioning
	G92 Z1.60 ; Remark: Adjuted from Z0 to Z1.60 // set Z position to axis minimum (you may want to adjust this)

	G1 X100 Y100 F6000 ; move probe to center of the bed. Adjust as needed.
	G30 ; probe the bed to establish z0