New IR z probe issues

[agent0810]

New to 3d printing and have a Duet 2 wifi board on my ender 5 pro. trying to add on my IR probe. it keeps showing red 1000 on the web interface. Been trying to follow this with no luck:

https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe#Section_Mini_differential_IR_sensor_by_dc42

This is the sensor i bought with cable:

https://www.filastruder.com/products/mini-differential-ir-height-sensor

here is my config:

; Configuration file for Duet WiFi (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.1.3 on Sun Jul 05 2020 20:32:26 GMT-0500 (Central Daylight Time)

; General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Schaal3DPrinter" ; set printer name

; Network
M552 S1 ; enable network
M586 P0 S1 ; enable HTTP
M586 P1 S1 ; enable FTP
M586 P2 S1 ; enable 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 X80.00 Y80.00 Z800.00 E102.30 ; set steps per mm
M566 X900.00 Y900.00 Z12.00 E120.00 ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z180.00 E1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z20.00 E250.00 ; set accelerations (mm/s^2)
M906 X800 Y800 Z800 E800 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 X225 Y225 Z300 S0 ; set axis maxima

; Endstops
M574 X2 S1 P"xstop" ; configure active-high endstop for low end on X via pin xstop
M574 Y2 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 high end on Z via pin zstop

; Z-Probe
M558 P1 C"zprobe.in" 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 Y15:195 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 S0 H-1 ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"fan1" Q500 ; create fan 1 on pin fan1 and set its frequency
M106 P1 S1 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

; 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
M501

[Phaedrux]

@agent0810 said in New IR z probe issues:

it keeps showing red 1000 on the web interface.

@agent0810 said in New IR z probe issues:

; Z-Probe
M558 P1 C"zprobe.in" H5 F120 T6000 ;

You can try inverting the signal by adding a ! to the pin name like this

M558 P1 C"!zprobe.in" H5 F120 T6000

But that seems odd for the IR sensor as I don't think that's normally required.

Use this test method after to carefully check it works.

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

[agent0810]

I did the dynamic test after adding the ! and it failed. The bed was moving up twards the probe and put a paper under the probe to stop it and it didnt stop. i dont see what do to do if that test fails. thank you again!

The sensor on the web page now shows 5. so that is an improvement i think.

[Phaedrux]

Can you double check the wiring? It's showing as triggered when it should not be. The Zprobe pin would be suspect.

[jay_s_uk]

These should have the pullup resistor enabled.
So it would be

M558 P1 C"^zprobe.in" H5 F120 T6000

[agent0810]

Thanks guys, got the wiring fixed. centered it on the bed and got it where it needed to be, ran the G92 Z0 to tell it that is Z0, then ran lowered the bed and ran G30 S-1 and it keeps stopping before it should. states stopped height 1.274mm or another time 1.255mm or another time 1.320mm. not sure what i am doing wrong on settting the Z0.

[Phaedrux]

@agent0810 said in New IR z probe issues:

tates stopped height 1.274mm or another time 1.255mm or another time 1.320mm.

Is your bed at temp during this? Have you PID tuned the bed? Using bang bang can cause the bed shape to change when the heater is energized and could explain the variation.

[agent0810]

@Phaedrux my bed was not at temp, so it was at room temp. i did a PID tune after i installed the new board as well.

[Phaedrux]

What is the beb surface? can you test with a sheet of plain white paper?

[agent0810]

@Phaedrux its a glass bes with a black material on it. i can throw a piece of white paper on it to see if it makes a difference.

[agent0810]

@Phaedrux sorry for the delay, same result with the plain white piece of paper, stopped at

Stopped at height 1.745 mm

[Phaedrux]

Consistently? Does that make sense given the thickness of the glass? assuming the black is on the back side?

[agent0810]

@Phaedrux im new to this but i dont think so. i thought when we got it level in the middle and sent that code it told the probe where 0 is? shouldnt that be where it stops then?

[Phaedrux]

Post your homing files and bed.g.

When you do the G30 S-1 procedure to measure the trigger height, is it consistent now?

[agent0810]

@Phaedrux

bed.g
; called to perform automatic bed compensation via G32
;
; generated by RepRapFirmware Configuration Tool v3.1.3 on Sun Jul 05 2020 20:32:26 GMT-0500 (Central Daylight Time)
M561 ; clear any bed transform
G29 ; probe the bed and enable compensation

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.1.3 on Sun Jul 05 2020 20:32:27 GMT-0500 (Central Daylight Time)
G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 X+250 Y+250 F1800 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X-5 Y-5 F6000 ; go back a few mm
G1 H1 X+230 Y+230 F360 ; move slowly to X and Y axis endstops once more (second pass)
;G1 H1 Z305 F360 ; move Z up stopping at the endstop
G1 H1 Z-320 F360 ; move Z stopping at the endstop
G90 ; absolute positioning

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

; homex.g
; called to home the X axis
;
; generated by RepRapFirmware Configuration Tool v3.1.3 on Sun Jul 05 2020 20:32:27 GMT-0500 (Central Daylight Time)
G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 X+250 F1800 ; move quickly to X axis endstop and stop there (first pass)
G1 H2 X-5 F6000 ; go back a few mm
G1 H1 X+230 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 v3.1.3 on Sun Jul 05 2020 20:32:27 GMT-0500 (Central Daylight Time)
G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
G1 H1 Y+230 F1800 ; move quickly to Y axis endstop and stop there (first pass)
G1 H2 Y-5 F6000 ; go back a few mm
G1 H1 Y+230 F360 ; move slowly to Y axis endstop once more (second pass)
G1 H2 Z-5 F6000 ; lower Z again
G90 ; absolute positioning

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v3.1.3 on Sun Jul 05 2020 20:32:27 GMT-0500 (Central Daylight Time)
G91 ; relative positioning
G1 H2 Z5 F6000 ; lift Z relative to current position
;G1 H1 Z305 F1800 ; move Z up until the endstop is triggered
G1 H1 Z-320 F360 ; move Z stopping at the endstop
G90 ; absolute positioning

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

[Phaedrux]

Your homing file is configured to use the Z endstop instead of the probe.

So in homeall/homez you'd want to replace this part:

@agent0810 said in New IR z probe issues:

;G1 H1 Z305 F360 ; move Z up stopping at the endstop
G1 H1 Z-320 F360 ; move Z stopping at the endstop
G90 ; absolute positioning

with something like this

G90 ; absolute positioning
G1 X150 Y150 F6000 ; move probe to center of bed
G30 ; probe the bed

[agent0810]

@Phaedrux Changed as requested, and same result. do i need to move the mount holding my probe up a bit?

[Phaedrux]

@agent0810 said in New IR z probe issues:

do i need to move the mount holding my probe up a bit?

Maybe? I haven't seen how you have it mounted and even then I'm not an expert on the IR probe. Maybe post a photo?

Also check the lens of the sensor to see if it's dirty or bent or something. It can be cleaned with a cotton bud and IPA.

[agent0810]

@Phaedrux
would a BL touch be a better route?

[Phaedrux]

Well the IR sensor should be a good choice, I'm just not sure what's really going on. Can you provide some more details on the setup as it is now so we can figure out if it's a configuration issues, or an issue with the probe itself. We'll try and cover our bases first.

Post your config.g as it is right now. Confirm you're running fw 3.1.1 by sending M115. Also send M98 P"config.g" and post the results.

Post a photo of your probe as mounted and a close up of it. Also maybe the wiring at the board.