Piezo, Varning G28 readings not consistent
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Hi, I'm trying to execute precision piezo v2.85 on Cartesian with Titan Aero extruder, but I couldn't. after all the attempts, Piezo, "Warning G28 readings not consistency" it seems that piezo does not trigger at the same height. As a bed, I have Creatily glass. Have tried to adjust V2 on PCB Piezo but it runs the same fault. What can be done more to work properly. Thanks.
; Configuration file for Duet WiFi (firmware version 2.03) ; executed by the firmware on start-up ; ; generated by RepRapFirmware Configuration Tool v2.1.8 on Sat Mar 07 2020 00:00:28 GMT+0100 (centraleuropeisk normaltid) ; General preferences G90 ; send absolute coordinates... M83 ; ...but relative extruder moves M550 P"My Printer" ; set printer name ; Network M552 S1 ; enable network 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 S1 ; physical drive 1 goes forwards M569 P2 S0 ; physical drive 2 goes backwards M569 P3 S0 ; physical drive 3 goes backwards M584 X0 Y1 Z2 E3 ; set drive mapping M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation M92 X160.00 Y160.00 Z400 E448 ; 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 Z50.00 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 X-60 Y0 Z0 S1 ; set axis minima M208 X240 Y240 Z220 S0 ; set axis maxima M208 X-60:240 Y0:240 Z0:220 ; set axis minima and maxima ; Endstops M574 X1 Y1 Z1 S1 ; set active low and disabled endstops ; Z-Probe M558 P8 I1 R0.4 F420 G31 X0 Y0 Z0.163 P100 ; disable Z probe but set dive height, probe speed and travel speed M557 X15:240 Y15:240 S20 ; define mesh grid ; Heaters M305 P0 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 0 M143 H0 S120 ; set temperature limit for heater 0 to 120C 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 I0 F500 H-1 ; set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off M106 P1 S1 I0 F500 H1 T45 ; set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on ; Tools M563 P0 D0 S"TitanAero" 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 ; homeall.g ; called to home all axes ; ; generated by RepRapFirmware Configuration Tool v2.1.8 on Sat Mar 07 2020 00:00:28 GMT+0100 (centraleuropeisk normaltid) G91 ; relative positioning G1 H2 Z5 F6000 ; lift Z relative to current position G1 H1 X-245 Y-245 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-245 Y-245 F360 ; move slowly to X and Y axis endstops once more (second pass) G1 H1 Z-245 F200 ; move Z down stopping at the endstop G90 ; absolute positioning G92 Z0 ; set Z position to axis minimum (you may want to adjust this) G30 ; lower head, stop when probe triggered and set Z to trigger height ; Uncomment the following lines to lift Z after probing ;G91 ; relative positioning ;G1 Z5 F100 ; lift Z relative to current position ;G90 ; absolute positioning ;G30 ; lower head, stop when probe triggered and set Z to trigger height ; homeall.g ; called to home all axes ; ; generated by RepRapFirmware Configuration Tool v2.1.8 on Sat Mar 07 2020 00:00:28 GMT+0100 (centraleuropeisk normaltid) G91 ; relative positioning G1 H2 Z5 F6000 ; lift Z relative to current position G1 H1 X-245 Y-245 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-245 Y-245 F360 ; move slowly to X and Y axis endstops once more (second pass) G1 H1 Z-245 F200 ; move Z down stopping at the endstop G90 ; absolute positioning G92 Z0 ; set Z position to axis minimum (you may want to adjust this) G30 ; lower head, stop when probe triggered and set Z to trigger height ; Uncomment the following lines to lift Z after probing ;G91 ; relative positioning ;G1 Z5 F100 ; lift Z relative to current position ;G90 ; absolute positioning ;G30 ; lower head, stop when probe triggered and set Z totrigger height ; homez.g ; called to home the Z axis ; ; generated by RepRapFirmware Configuration Tool v2.1.8 on Sat Mar 07 2020 00:00:29 GMT+0100 (centraleuropeisk normaltid) G91 ; relative positioning G1 H2 Z5 F600 ; lift Z relative to current position G1 H1 Z-245 F80 ; move Z down until the endstop is triggered G1 H2 Z1 F60 ; go back a few mm G1 H1 Z-245 F20 ; move slowly to X axis endstop once more (second pass) G92 Z0 ; set Z position to axis minimum (you may want to adjust this) G30 ; lower head, stop when probe triggered and set Z to trigger height ; Uncomment the following lines to lift Z after probing ;G91 ; relative positioning ;G1 Z5 F100 ; lift Z relative to current position ;G90 ; absolute positioning
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@chris4 said in Piezo, Varning G28 readings not consistent:
M558 P8 I1 R0.4 F420
You can try adding some parameters to increase the accuracy.
M558 P8 I1 R0.4 F420 T6000 A10 S0.01This will cause it to probe at least twice and will reprobe up to 10 times until 2 consecutive probe results are within 0.01mm
As for tuning the piezo sensor itself, try searching the forum for some tips on what others have used.
