Piezo Z probe problems/ Seeking alternatives !!!

CozyP

If this thing ( Piezo ) is not compatible with Duet, is there a solution to mesh bed with a mechanical endstop -temporarly silicon-glued- to my heaterblock, so that I can start printing???

invertmast

@cozyp said in Piezo Z probe problems/ Seeking alternatives !!!:

If this thing ( Piezo ) is not compatible with Duet, is there a solution to mesh bed with a mechanical endstop -temporarly silicon-glued- to my heaterblock, so that I can start printing???

im using the Precision piezo Orion on my Duetwifi with basically zero issues. It is very sensitive to movement. Mine shows a "1000" in the Z-probe box of DWC during nearly all movement of the X/Y carriage's. One thing i did to combat the false "probe already triggered" messages was to put a G4 D2.0 (2 second pause) prior to the Z movement to probe the bed in the Home files.
In my case, the biggest headache I had was having the Bowden tube "bundled" with the wiring going to the hotend carriage. This put enough pressure on the piezo sensor to constantly trigger it. I now have my wiring and bowden cabling separate and haven't had any further problems.

As for the G29 bed mesh probing sequence, i had to turn the acceleration and instantaneous movements for the Z axis down significantly, otherwise just the initial movement of the Z steppers (i have 4) would cause vibrations to run through the machine and cause the piezo to false trigger.
Mine is wired into the Z probe port on the board itself

Here is a copy of my Z-probe config:
; Z-Probe
M574 Z1 S2 ; Set endstops controlled by probe
M558 P8 I1 H2 A4 S0.2 R.5 F100 Z1 ;Z probe switch type, inverted (I1),2mm dive height, 4 probes per point, 0.2mm probing variance, 0.5 second pause, Feed100, Zprobe as switch
G31 X0 Y0 z0.1 P280 ; Set Z probe trigger value, offset and trigger height X, Y, Z offsets, debounce interval
M557 X15:562 Y15:503 S150 ; Define mesh grid

Phaedrux

@cozyp said in Piezo Z probe problems/ Seeking alternatives !!!:

Error: G0/G1: insufficient axes homed.

Can you post your homing files as well.

CozyP

@Phaedrux

I have posted the homeall and homez files. If you need homex and homey let me know!!!
Thank you

; homeall.g
; called to home all axes
;
; generated by RepRapFirmware Configuration Tool v2 on Sun Dec 23 2018 16:45:16 GMT+0200 (Eastern European Standard Time)
G91 ; relative positioning
G1 Z3 F3600 S2 ; lift Z relative to current position
G1 S1 X-365 Y-665 F4200 ; move quickly to X and Y axis endstops and stop there (first pass)
G1 X5 Y5 F3600 ; go back a few mm
G1 S1 X-365 Y-665 F900 ; move slowly to X and Y axis endstops once more (second pass)
G90 ; absolute positioning
G1 X0 Y0 F3600 ; go to first bed probe point and home Z
G30 ; home Z by probing the bed

; Uncomment the following lines to lift Z after probing
;G91 ; relative positioning
;G1 S2 Z3 F60 ; lift Z relative to current position
;G90 ; absolute positioning

; homez.g
; called to home the Z axis
;
; generated by RepRapFirmware Configuration Tool v2 on Sun Dec 23 2018 16:45:16 GMT+0200 (Eastern European Standard Time)
G91 ; relative positioning
G1 Z3 F3600 S2 ; lift Z relative to current position
G90 ; absolute positioning
G1 X0 Y0 F3600 ; go to first probe point
G30 ; home Z by probing the bed

; Uncomment the following lines to lift Z after probing
;G91 ; relative positioning
;G1 S2 Z3 F60 ; lift Z relative to current position
;G90 ; absolute positioning

Phaedrux

@cozyp said in Piezo Z probe problems/ Seeking alternatives !!!:

G1 X0 Y0 F3600 ; go to first bed probe point and home Z
G30 ; home Z by probing the bed

Is 0,0 really where you want to probe the bed?

G31 P400 X0 Y0 Z0.55

Is Z0.55 a measured trigger height value? It's normal for nozzle contact probes to require negative values since they push into the bed and compress the springs, etc a bit before triggering.

CozyP

@phaedrux Z0.55 is the real difference between nozzle and glass with the help of the piezo.
If I home Z and remove the piezo, there is a gap between nozzle and bed, so I added +0.55 as an offset to position the nozzle exactly on bed surface.

Also, beware that this piezo DOES NOT have springs, it's a simple film attached to the nozzle

Phaedrux

Your trigger height should be a measured using this procedure: https://duet3d.dozuki.com/Wiki/Test_and_calibrate_the_Z_probe#Section_Calibrate_the_Z_probe_trigger_height

CozyP

gimme 5' to try that asap and provide you an update.
Thanks

CozyP

G30 S-1
Error: Z probe already triggered at start of probing move.

Also, the machine continuously crashes to X axis endstop for 1 sec.....

Phaedrux

Is that when doing homeall?

CozyP

No. Only if I hit the G30 S-1 or the Bed Mesh compensation

Phaedrux

Did you move the print head to bed center with the nozzle just touching the bed before doing G30 S-1?

CozyP

Yes, I did exactly as the post you re-directed me dictated

Phaedrux

So it goes from bed center to crash into the x endstop?

CozyP

Yes, exactly

Phaedrux

Can you post your config.g as it is now?

CozyP

; Configuration file for Duet WiFi (firmware version 1.21)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v2 on Sun Dec 23 2018 19:43:56 GMT+0200 (Eastern European Standard Time)

; General preferences
G90 ; Send absolute coordinates...
M83 ; ...but relative extruder moves

; Network
M550 P"THE PRINTER" ; Set machine name
M552 S1 ; Enable network
M587 S"Hector's House" P"2291052862" ; Configure access point. You can delete this line once connected
M586 P0 S1 ; Enable HTTP
M586 P1 S0 ; Disable FTP
M586 P2 S0 ; Disable Telnet

; Drives
M569 P0 S0 ; Drive 0 goes backwards
M569 P1 S1 ; Drive 1 goes forwards
M569 P2 S1 ; Drive 2 goes forwards
M569 P3 S0 ; Drive 3 goes backwards
M350 X32 Y32 Z32 E32 I0 ; Configure microstepping without interpolation
M92 X160.00 Y160.00 Z791.50 E1800.00 ; Set steps per mm
M566 X780.00 Y780.00 Z300.00 E840.00 ; Set maximum instantaneous speed changes (mm/min)
M203 X16200.00 Y16200.00 Z420.00 E7200.00 ; Set maximum speeds (mm/min)
M201 X1800.00 Y1800.00 Z6.00 E250.00 ; Set accelerations (mm/s^2)
M906 X450.00 Y950.00 Z1000.00 E1389.00 I50 ; 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 X360 Y660 Z180 S0 ; Set axis maxima

; Endstops
M574 Z1 S0 ; Set active low and disabled endstops
M574 X1 Y1 S1 ; Set active high endstops

; Z-Probe
M558 P5 R0.4 H3 F400 T3600 ; Set Z probe type to effector and the dive height + speeds
G31 P400 X0 Y0 Z0 ; Set Z probe trigger value, offset and trigger height
M557 X0:330 Y0:660 S40 ; Define mesh grid

; Heaters
M140 H-1 ; Disable heated bed
M305 P1 T100000 B4138 R4700 ; Set thermistor + ADC parameters for heater 1
M143 H1 S280 ; Set temperature limit for heater 1 to 280C

; Fans
M106 P0 S0.5 I0 F600 H1 T45 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P1 S0 I0 F200 H-1 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P2 S0 I0 F200 H-1 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned off

; Tools
M563 P0 D0 H1 ; 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

; Automatic power saving
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; Set voltage thresholds and actions to run on power loss

; Custom settings are not configured

dc42

You don't have the i1 parameter in the M558 command, If the sensor is a naked piezo cylinder (which is what it looks like), you must use i1 in that command as I said in my previous email, otherwise you will get the "already triggered" error.

CozyP

@Phaedrux Thank you for taking the time and helping me out.
The truth is, there is so much time lost and solution is not found.

If we accept the fact, that Duet is not compatible with this sensor, what are the other options available???
All I have is a BLclone and mechanical endstop. Bear in mind, I am seeking the easiest solution available, as I just learned G code, previous motherboard was plugNplay

CozyP

@dc42 Just added I1 and the nozzle crashed to bed on mesh compensation.
However, it did home correctly.

; Z-Probe
M558 P5 I1 R0.4 H3 F400 T3600 ; Set Z probe type to effector and the dive height + speeds
G31 P400 X0 Y0 Z0 ; Set Z probe trigger value, offset and trigger height
M557 X0:330 Y0:660 S40 ; Define mesh grid