X, Y, Z Endstops intermittent connection

fcwilt

IF different endstop sensors are having the same problem then the wiring itself would be the next thing to suspect.

What sort of wiring is it? How long are the runs? Do they run along side any stepper or hotend wiring?

Frederick

infiniteloop

wiring. I've tested with different endstops from another printer that's working. Same issues.

This way, you test endstops, not the wiring. I’m pretty sure the signal line suffers from voltage fluctuations. This can happen in case of NO switches with just two lines: GND (or VCC) and signal. As long as the switch is open, the signal line hangs in the air and acts as an antenna.

Depending on your setup, a pull-up (or pull-down) resistor can stabilise the signal - if the NO switch connects to GND (i.e. active low), you can try to activate the internal pull-up of the Duet’s I/O port in your endstop configuration like this:

M574 X1 S1 P“!^io1.in"

But without more information about your config.g and wiring, that’s pure speculation.

Phrayzur

The wiring is the stock Creality CR-10s wiring. It worked fine until I set up the new board. I've tested it all for continuity and there's no problem with that.

I hate to admit it, but I really don't understand enough to figure out the rest of your message.

What would the best way to upload my config.g?

infiniteloop

@phrayzur said in X, Y, Z Endstops intermittent connection:

What would the best way to upload my config.g?

From the online editor, select </> from the icons above, then, paste your config into the line between the tags.

really don't understand enough to figure out the rest of your message

Don't worry, we'll figure that out

Phrayzur

@infiniteloop Here's the config.g file.

; 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 Wed Jun 15 2022 10:13:35 GMT-0600 (Central Standard Time)

; General preferences
G90                                          ; send absolute coordinates... - ORIGINAL
M83                                          ; ...but relative extruder moves - ORIGINAL
M550 P"CR-10s Duet 3 Mini 5+"                ; set printer name - ORIGINAL
M918 P1 E4 F2000000                          ; configure direct-connect display - ORIGINAL

; Network
M552 S1                                      ; enable network
M586 P0 S1                                   ; enable HTTP
M586 P1 S0                                   ; disable FTP
M586 P2 S0                                   ; disable Telnet

;Drives
M569 P0.0 D3 V91 S1							 ; physical drive 0.0 goes forwards
M569 P0.1 D3 V91 S0							 ; physical drive 0.1 goes forwards
M569 P0.2 D3 V18 S1							 ; physical drive 0.2 goes backwards
M569 P0.3 D3 V18 S1							 ; physical drive 0.3 goes backwards
M569 P0.4 D3 V75 S0							 ; physical drive 0.4 goes forwards

M584 X0.0 Y0.1 Z0.2:0.3 E0.4                 ; set drive mapping

M350 X16 Y16 Z16 E16 I1                      ; configure microstepping with interpolation - ORIGINAL
M92 X80.00 Y80.00 Z400.00 E400.00            ; set steps per mm - ORIGINAL
; M566 X480.00 Y480.00 Z144.00 E300.00         ; set maximum instantaneous speed changes (mm/min) - ORIGINAL
M566 X480.00 Y360.00 Z144.00 E300.00         ; set maximum instantaneous speed changes (mm/min)
M203 X12000.00 Y12000.00 Z1200.00 E3000.00   ; set maximum speeds (mm/min) - ORIGINAL
; M201 X1000.00 Y1000.00 Z100.00 E5000.00      ; set accelerations (mm/s^2) - ORIGINAL
M201 X1000.00 Y600.00 Z100.00 E5000.00      ; set accelerations (mm/s^2)
M906 X800 Y800 Z800 E800 I30                 ; set motor currents (mA) and motor idle factor in per cent - ORIGINAL
M84 S30                                      ; Set idle timeout - ORIGINAL

; Axis Limits
M208 X0 Y0 Z0 S1                             ; set axis minima - ORIGINAL
M208 X290 Y298 Z380 S0                       ; set axis maxima - ORIGINAL

; Endstops
M574 X1 S1 P"io5.in"                         ; configure switch-type (e.g. microswitch) endstop for low end on X via pin io5.in
M574 Y1 S1 P"io6.in"                         ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin io6.in
M574 Z1 S1 P"io2.in"                         ; configure switch-type (e.g. microswitch) endstop for low end on Z via pin io2.in

; ; Z-Probe
; M558 P0 H5 F120 T6000                        ; disable Z probe but set dive height, probe speed and travel speed - ORIGINAL
; M557 X15:215 Y15:195 S20                     ; define mesh grid - ORIGINAL

; Bed Heater
M308 S0 P"temp0" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin temp0 - ORIGINAL
M950 H0 C"out0" T0                           ; create bed heater output on out0 and map it to sensor 0 - ORIGINAL
; M307 H0 B1 S1.00                             ; enable bang-bang mode for the bed heater and set PWM limit - ORIGINAL
M307 H0 R0.154 K0.181:0.000 D0.69 E1.35 S1.00 B0 V12.1; disable bang-bang mode for the bed heater and set PWM limit
M140 H0                                      ; map heated bed to heater 0 - ORIGINAL
M143 H0 S120                                 ; set temperature limit for heater 0 to 120C - ORIGINAL

; Hotend Heater
; M308 S1 P"temp1" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin temp1 - ORIGINAL
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 hotend heater output on out1 and map it to sensor 1 - ORIGINAL
; M307 H1 B0 S1.00                             ; disable bang-bang mode for hotend heater and set PWM limit - ORIGINAL
M307 H1 R1.293 K0.255:0.000 D6.03 E1.35 S1.00 B0 V12.1	; disable bang-bang mode for hotend heater and set PWM limit
M143 H1 S285                                 ; set temperature limit for hotend heater 1 to 285C - ORIGINAL

; Fans
M950 F0 C"out3" Q500                         ; create fan 0 on pin out3 and set its frequency - ORIGINAL
; M106 P0 S0 H-1                               ; set fan 0 value. Thermostatic control is turned off - ORIGINAL
M106 P0 C"Part Cooling Fan" S0 H-1           ; set fan 0 value. Thermostatic control is turned off

M950 F1 C"out4" Q500                         ; create fan 1 on pin out4 and set its frequency - ORIGINAL
; M106 P1 S1 H1 T45                            ; set fan 1 value. Thermostatic control is turned on - ORIGINAL
M106 P1 C"Hotend Fan" S1 H1 T45              ; set fan 1 value. Thermostatic control is turned on

M950 F2 C"out5" Q500                         ; create fan 2 on pin out5 and set its frequency - ORIGINAL
; M106 P2 S1 H-1                               ; set fan 2 value. Thermostatic control is turned off - ORIGINAL
M106 P2 C"CaseFan" S1 H-1                    ; set fan 2 name and value. Thermostatic control is turned off

; Tools
M563 P0 S"V6 Volcano" D0 H1 F0               ; define tool 0 - ORIGINAL
; G10 P0 X0 Y0 Z0                              ; set tool 0 axis offsets - ORIGINAL
G10 P0 X0 Y5 Z0                              ; set tool 0 axis offsets
G10 P0 R0 S0                                 ; set initial tool 0 active and standby temperatures to 0C - ORIGINAL

I'm sorry about the lack of understanding of the terminology. Electrical isn't my forte

infiniteloop

@phrayzur Thanks for the config. You've connected the end stops to io_2, io_5 and io_6 of your Duet. Can you please post a photo of these ports (with plugs) so that I can see which pins are connected?

In your original post, you mentioned some improper axis movement: does this still happen?

Phrayzur

@infiniteloop I really appreciate the help. Thank you.

Here's the photo...

The improper axis movement does still happen. I believe what it is is when homing the axis, it initially doesn't check to see if the endstop is triggered and moves away from the home position. Then, after moving away, it checks the endstop trigger and if it's registering as triggered then it stops where it is.

It seems like all the problems happen much more frequently with the X axis then about half as much with the Y axis and only occasionally with the Z axis.

infiniteloop

@phrayzur said in X, Y, Z Endstops intermittent connection:

Here's the photo...

Thank you. I see that you connected GND and io.in - that's fine. Am I right that, at the switches, the two outer pins (S and V) are wired?

Phrayzur

@infiniteloop That's right

infiniteloop

@phrayzur OK. This means that the endstops are NC (normally closed) until they are "activated" - then, the contact is opened. That's a good thing, as the signal is normally pulled to GND. As long as the connection isn't loose (connectors, crimps, somewhere along the line), you should get a stable reading.

However, that's not what you experience, so let's try a modification of your config.g: Change this

; Endstops
M574 X1 S1 P"io5.in"                         ; configure switch-type (e.g. microswitch) endstop for low end on X via pin io5.in
M574 Y1 S1 P"io6.in"                         ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin io6.in
M574 Z1 S1 P"io2.in"                         ; configure switch-type (e.g. microswitch) endstop for low end on Z via pin io2.in

into this:

; Endstops
M574 X1 S1 P"^io5.in"                         ; configure switch-type (e.g. microswitch) endstop for low end on X via pin io5.in
M574 Y1 S1 P"^io6.in"                         ; configure switch-type (e.g. microswitch) endstop for low end on Y via pin io6.in
M574 Z1 S1 P"^io2.in"                         ; configure switch-type (e.g. microswitch) endstop for low end on Z via pin io2.in

It's just a caret ("^") in front of the io.in names. After a restart of the Duet, test this arrangement by pressing the contacts manually - no need to involve the steppers.

If this measure doesn't stabilise the readings of your endstops, please check your connectors, crimps and the cabling carefully: I can't think of any other reason for your setup not to work properly.

In a second step, we'll have a look at the X/YZ steppers. But first, get your endstops right.

Phrayzur

@infiniteloop Thanks! Let me play around with this for a bit and see if the problems fixed. So far the X axis isn't rapidly switching...