Servo deployed probe on Duet Maestro

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

Phaedrux

@Veti said in Servo deployed probe on Duet Maestro:

change to C"^zprobe.in"

Veti suggested that, but you still have

@Blacksheep99 said in Servo deployed probe on Duet Maestro:

C"^!zprobe.in"

Blacksheep99

@Phaedrux said in Servo deployed probe on Duet Maestro:

@Veti said in Servo deployed probe on Duet Maestro:

change to C"^zprobe.in"

Veti suggested that, but you still have

@Blacksheep99 said in Servo deployed probe on Duet Maestro:

C"^!zprobe.in"

I tried it but when i then test G30 it fails immediately and tells me the probe is already triggered. Is this in relation to the G31 P500?

Phaedrux

As I'm not familiar with this probe we might have to wait for Veti to weigh in as I'm not sure why it would be always detecting as triggered or never detecting as triggered.

Blacksheep99

@Phaedrux Can I just ask clarification on two things. H for Dive height. I have this set to 150 which is the height of the build volume. My reasoning is that the Z needs to raise 150 to meet the print heads but should stop when it triggers the probe?

Trigger height, is this the height of the probe above the nozzles when contact is made?

Thanks for helping, i really appreciate it

FYI. Retracted is 1000 (red box), deployed is 0 (grey background)

Phaedrux

That's pretty excessive for dive height. As I mentioned before, the dive height should be just slightly more than your trigger height. So if your probe triggers when the nozzle is 3mm above the bed G31 Z3), you'd want you dive height to be at least 4mm for example (M558 H4).

Phaedrux

@Blacksheep99 said in Servo deployed probe on Duet Maestro:

FYI. Retracted is 1000 (red box), deployed is 0 (grey background)

I'm not familiar enough with the probe to say if that is normal or not. I would have guessed that it should stay as untriggered regardless of deploy or retract status and only shown triggered when actually pushed up to break the optical beam.

Blacksheep99

@Phaedrux said in Servo deployed probe on Duet Maestro:

@Blacksheep99 said in Servo deployed probe on Duet Maestro:

FYI. Retracted is 1000 (red box), deployed is 0 (grey background)

I'm not familiar enough with the probe to say if that is normal or not. I would have guessed that it should stay as untriggered regardless of deploy or retract status and only shown triggered when actually pushed up to break the optical beam.

That logic makes sense. The way it looks to operate is that when retracted it is breaking the end stop beam (essentially triggered) but one deployed it is not and hence the state changes. One the probe is touched it causes the flag to break the beam and state changes to triggered.

Blacksheep99

When I home X,Y,Z are all 0,0,0 on the dashboard. Setting a low dive height only moves the bed up that height when I run G30. I should be aiming for the tip of the nozzles to be 0 for Z surely? Would this explain the issue?

Phaedrux

The triggered status really only matters when doing the G30. So perhaps your probe isn't getting deployed early enough? When exactly are you getting the probe is triggered at start of probing move error?

What do you have in your homeall now? Remember that you are in control of the deploy and retract state now, which is a bit different than the BLTouch which automates that.

For homing and dive height you can also in control of how the print head is positioned before probing. If you need to raise the Z axis a bit to ensure that the probe has room you can do that in your homeall. It's already common to raise it a bit for clearance for X Y to home. Normally you'd only want to raise it just slightly more than the dive height to ensure there is clearance for the pin to drop.

Veti

look at the homeall script i posted

you need to run a M401 before the G30 and run a M402 afterwards.

I'm not familiar enough with the probe to say if that is normal or not. I would have guessed that it should stay as untriggered regardless of deploy or retract status and only shown triggered when actually pushed up to break the optical beam.

the probe is always triggerd in the retracted state. this is a good thing because if you forget to deploy or there is a problem it does not cause damage as it is triggered immediately

Blacksheep99

@Veti said in Servo deployed probe on Duet Maestro:

look at the homeall script i posted

you need to run a M401 before the G30 and run a M402 afterwards.

I'm not familiar enough with the probe to say if that is normal or not. I would have guessed that it should stay as untriggered regardless of deploy or retract status and only shown triggered when actually pushed up to break the optical beam.

the probe is always triggerd in the retracted state. this is a good thing because if you forget to deploy or there is a problem it does not cause damage as it is triggered immediately

So sorry to clarify things but I'm changing a few things.

I've done as you originally said and removed the inverted pin in the config.g for zprobe it now reports 1000 (red).

; 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

My home all

G91                     ; relative positioning
G1 H2 Z5 F6000          ; lift Z relative to current position
G1 H1 X-285 Y-155 F1800 ; 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-285 Y-155 F360  ; move slowly to X and Y axis endstops once more (second pass)
G1 H1 Z-155 F360        ; move Z down stopping at the endstop
G90                     ; absolute positioning
M402
G92 Z0                  ; set Z position to axis minimum (you may want to adjust this)

When you say run M401 then G30 are you talking via the console to test its function? I just tried that and it reversed the bed down hitting the end stop and kept trying to go, I had to hit stop.