Servo deployed probe on Duet Maestro

Veti

its pretty close to bltouch. just select P8 instead of p9.

same retract and deploy scripts (might have to adjust the angles slightly)
although you need to add a M401 if you want to deploy it before and M402 when you want to retract.

example homeall

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.2.0 on Fri Jan 01 2021 18:39:48 GMT+0100 (Central European Standard Time)
G91                     ; relative positioning
G1 H2 Z5 F6000          ; lift Z relative to current position
G1 H1 X-240 Y-240 F3000 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X5 Y5 F6000       ; go back a few mm
G1 H1 X-240 Y-240 F240  ; move slowly to X and Y axis endstops once more (second pass)
G90                     ; absolute positioning
G1 X10 Y10 F6000        ; go to first bed probe point and home Z
M401
G30                     ; home Z by probing the bed
M402

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

Blacksheep99

@Veti Thanks, I'll give this a try when I finish work. What about my config.g file? or does this replace what's currently in there?

Blacksheep99

@Veti said in Servo deployed probe on Duet Maestro:

@Blacksheep99

its pretty close to bltouch. just select P8 instead of p9.

same retract and deploy scripts (might have to adjust the angles slightly)
although you need to add a M401 if you want to deploy it before and M402 when you want to retract.

example homeall

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v3.2.0 on Fri Jan 01 2021 18:39:48 GMT+0100 (Central European Standard Time)
G91                     ; relative positioning
G1 H2 Z5 F6000          ; lift Z relative to current position
G1 H1 X-240 Y-240 F3000 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 H2 X5 Y5 F6000       ; go back a few mm
G1 H1 X-240 Y-240 F240  ; move slowly to X and Y axis endstops once more (second pass)
G90                     ; absolute positioning
G1 X10 Y10 F6000        ; go to first bed probe point and home Z
M401
G30                     ; home Z by probing the bed
M402

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

So taking your example I modified my home all to try this. I changed the X and X to my bed size. Sending just the M401 command deploys the probe fine, the M402 retracts it.

This is my config.g code.

M574 Z1 S1 ; Set endstops controlled by probe
M950 S0 C"^zprobe.mod" ; create servo pin 0 for BLTouch
M558 P8 C"^!zprobe.in" H2 F900 T6000 ; Set Z probe type to switch and the dive height + speeds
G31 P50 X50 Y-8 Z2.43 ; Set Z probe trigger value, offset and trigger height

When I home all the head moves out as expected, the bed starts to raise, probe deploys and the immediately retracts and the z stops.

My probe in the dashboard shows 0 when retracted and 1000 when deployed. Is the inverted pin causing an issue?

Blacksheep99

This is the bed and head setup. Excuse the chaos behind it!

Phaedrux

@Blacksheep99 said in Servo deployed probe on Duet Maestro:

Is the inverted pin causing an issue?

Could be. Your description makes it sound like it assumes that it's triggered as soon as it deploys? Correct?

dc42

@Blacksheep99 said in Servo deployed probe on Duet Maestro:

My probe in the dashboard shows 0 when retracted and 1000 when deployed. Is the inverted pin causing an issue?

What happens if you don't invert the pin? Does probing work then?

Veti

@Blacksheep99 said in Servo deployed probe on Duet Maestro:

My probe in the dashboard shows 0 when retracted and 1000 when deployed. Is the inverted pin causing an issue?

yes it needs to be inverted

change to C"^zprobe.in"

Blacksheep99

@Veti said in Servo deployed probe on Duet Maestro:

@Blacksheep99 said in Servo deployed probe on Duet Maestro:

My probe in the dashboard shows 0 when retracted and 1000 when deployed. Is the inverted pin causing an issue?

yes it needs to be inverted

change to C"^zprobe.in"

Ok, I've changed this. The probe itself is off the bed. Do I need to add a move command for X and Y to move the head over the bed?

I current have the mesh compensation commented out in the config.g not sure if that should be active?

Blacksheep99

Probe now shows 1000 when retracted.

To test the probe is working I moved X and Y over the bed and tried to run G30. It doesn't run as it says probe is already deployed.

Phaedrux

@Blacksheep99 said in Servo deployed probe on Duet Maestro:

Do I need to add a move command for X and Y to move the head over the bed?

yes.

@Blacksheep99 said in Servo deployed probe on Duet Maestro:

I current have the mesh compensation commented out in the config.g not sure if that should be active?

what exactly do you have commented out?

Phaedrux

@Blacksheep99 said in Servo deployed probe on Duet Maestro:

it says probe is already deployed.

In your homing files you may want to add a M401 at the start to ensure that the probe is retracted and so that the firmware is aware it's retracted.

Then try again.

Blacksheep99

@Phaedrux said in Servo deployed probe on Duet Maestro:

what exactly do you have commented out?

;M557 X15:265 Y15:135 S20                        ; define mesh grid

Phaedrux

Yes you should uncomment that line out. It tells the firmware where to probe when doing a G29.

Blacksheep99

@Phaedrux said in Servo deployed probe on Duet Maestro:

@Blacksheep99 said in Servo deployed probe on Duet Maestro:

it says probe is already deployed.

In your homing files you may want to add a M401 at the start to ensure that the probe is retracted and so that the firmware is aware it's retracted.

Then try again.

Do you mean M402?

Blacksheep99

@Phaedrux Thanks. Will do

Phaedrux

@Blacksheep99 said in Servo deployed probe on Duet Maestro:

Do you mean M402?

Yes, sorry. Retract the probe.

Blacksheep99

@Phaedrux said in Servo deployed probe on Duet Maestro:

@Blacksheep99 said in Servo deployed probe on Duet Maestro:

Do you mean M402?

Yes, sorry. Retract the probe.

Thanks, shows I'm paying attention if just a bit! ha

Blacksheep99

So I've got the probe showing '0' when retracted. I position the probe over the bed and run G30. The probe immediately deploys and the bed starts moving towards the print heads.

Following this guide: https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe

I press the Z probe up expecting the bed to stop but it continues leaving me to use emergency stop to kill things. What have I got wrong?

Phaedrux

please share your current probe config and refresh me on your wiring.

Blacksheep99

@Phaedrux full config.g

The probe is wired as per this.
https://www.thingiverse.com/thing:3303618

So 5v to servo and sensor, shared ground, zprobe mod to the servo, probe.in to the sensor

; Configuration file for Duet Maestro (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.2.1 on Sat Jan 09 2021 18:02:08 GMT+0000 (Greenwich Mean Time)

; General preferences
G90                                             ; send absolute coordinates...
M83                                             ; ...but relative extruder moves
M550 P"ST3Di280 Duet"                           ; set printer name

; Network
M552 P0.0.0.0 S1                                ; enable network and acquire dynamic address via DHCP
M586 P0 S1                                      ; enable HTTP
M586 P1 S0                                      ; disable FTP
M586 P2 S0                                      ; disable Telnet

; Drives
M569 P0 S1                                      ; physical drive 0 goes forwards
M569 P1 S0                                      ; physical drive 1 goes backwards
M569 P2 S0                                      ; physical drive 2 goes backwards
M569 P3 S0                                      ; physical drive 3 goes backwards
M569 P4 S1                                      ; physical drive 4 goes forwards
M584 X0 Y1 Z2 E3:4                              ; set drive mapping
M350 X16 Y16 Z16 E16:16 I1                      ; configure microstepping with interpolation
M92 X91.13 Y106.84 Z1235.52  E420.00:420.00       	; set steps per mm
M566 X900.00 Y900.00 Z60.00 E120.00:120.00      ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z180.00 E1200.00:1200.00 ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z20.00 E250.00:250.00      ; set accelerations (mm/s^2)
M906 X800 Y800 Z800 E800:800 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 X280 Y150 Z150 S0                          ; set axis maxima

; Endstops
M574 X1 S1 P"xstop"                             ; configure active-high endstop for low end on X via pin xstop
M574 Y1 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 low end on Z via pin zstop

; Z-Probe
M574 Z1 S1 										; Set endstops controlled by probe
M950 S0 C"^zprobe.mod" 							; create servo pin 0 for BLTouch
M558 P8 C"^!zprobe.in" H150 F900 T6000 			; Set Z probe type to switch and the dive height + speeds
G31 P50 X-50 Y-8 Z1.5 							;Set Z probe trigger value, offset and trigger height
M557 X15:265 Y15:135 S20                        ; define mesh grid

; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B3950  ; 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 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 S120                                    ; set temperature limit for heater 0 to 120C
M308 S1 P"e0temp" Y"thermistor" T100000 B3950   ; 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
M143 H1 S280                                    ; set temperature limit for heater 1 to 280C
M308 S2 P"e1temp" Y"thermistor" T100000 B3950   ; configure sensor 2 as thermistor on pin e1temp
M950 H2 C"e1heat" T2                            ; create nozzle heater output on e1heat and map it to sensor 2
M307 H2 B0 S1.00                                ; disable bang-bang mode for heater  and set PWM limit
M143 H2 S280                                    ; set temperature limit for heater 2 to 280C

; 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 H1:2 T45                             ; set fan 1 value. Thermostatic control is turned on

; Tools
M563 P0 S"Right" 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
M563 P1 S"Left" D1 H2 F0                        ; define tool 1
G10 P1 X0 Y0 Z0                                 ; set tool 1 axis offsets
G10 P1 R0 S0                                    ; set initial tool 1 active and standby temperatures to 0C

; Custom settings are not defined
M501
M911 S21 R23 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss