Z height

flopo · 7 Oct 2017, 16:18

Hi everyone,

I have a Delta printer with DuetWiFi and Smart Effector, when I print the nozzle is too close to the bed. I have to use the baby step to reach the optimal Z height.
Even if I do autocalibration, when I print the Z height is too close to the bed. What's the parameter I need to modify to adjust Z height?

this is my config file:

; Configuration file for Duet WiFi (firmware version 1.17)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool on Thu Aug 17 2017 23:56:06 GMT+0200 (ora solare Europa occidentale)

; General preferences
M111 S0 ; Debugging off
G21 ; Work in millimetres
G90 ; Send absolute coordinates…
M83 ; ...but relative extruder moves
M555 P2 ; Set firmware compatibility to look like Marlin

;*** The homed height is deliberately set too high in the following - you will adjust it during calibration.
M665 R139 L360.22 B125 H235 ; Set delta radius, diagonal rod length, printable radius and homed height
M666 X0 Y0 Z0 ; Put your endstop adjustments here, or let auto calibration find them
M208 Z0 S1 ; Set minimum Z
M206 X0 Y0 Z0

; Endstops
M574 X2 Y2 Z2 S1 ; Define active high microswitches
M558 P5 R0.4 F500 H10
G31 P100 X0 Y0 Z-0.1 ; Set Z probe trigger value, offset and trigger height
M557 R105 S20 ; Define mesh grid

; Drives
M569 P0 S1 ; Drive 0 goes forwards
M569 P1 S1 ; Drive 1 goes forwards
M569 P2 S1 ; Drive 2 goes forwards
M569 P3 S1 ; Drive 3 goes forwards
M350 X32 Y32 Z32 E32 I0 ; Configure microstepping without interpolation
M92 X200 Y200 Z200 E172 ; Set steps per mm
M566 X1200 Y1200 Z1200 E1200 ; Set maximum instantaneous speed changes (mm/min)
M203 X12000 Y12000 Z12000 E5000 ; Set maximum speeds (mm/min)
M201 X3000 Y3000 Z3000 E3000 ; Set accelerations (mm/s^2)
M906 X1100 Y1100 Z1100 E800 I100 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Heaters
M143 S265 ; Set maximum heater temperature to 265C
M301 H0 S1.00 P10 I0.1 D200 T0.4 W180 B30 ; Use PID on bed heater (may require further tuning)
M305 P0 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 0
M305 P1 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 1

; Tools
M563 P0 D0 H1 ; Define tool 0
G10 P0 X0 Y0 Z0.3 ; Set tool 0 axis offsets
G10 P0 R0 S0 ; Set initial tool 0 active and standby temperatures to 0C

; Network
M550 PDUET DELTA ; Set machine name
M552 S1 ; Enable network
M587 Sfiore_wifi2 P"fiorello1" ; Configure access point. You can delete this line once connected
M586 P0 S1 ; Enable HTTP
M586 P1 S1 ; Enable FTP
M586 P2 S0 ; Disable Telnet

; Fans
M106 P0 S1 I0 F500 H0:1 T60 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P1 S1 I0 F500 H-1 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P2 S1 I0 F500 H0:1 T50 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on

; Custom settings are not configured

; Miscellaneous
M501 ; Load saved parameters from non-volatile memory

Jarery · 7 Oct 2017, 16:47

G31 P100 X0 Y0 Z-0.1 ; Set Z probe trigger value, offset and trigger height

Trigger height needs to be set,
https://duet3d.com/wiki/Calibrating_a_delta_printer

scroll down to the Measuring Trigger Height section to get trigger height, then replace the Z-0.1 figure.
On mine, with smart effector and pei bed on a layer of thermal transfer gasket, I have Z-0.28

flopo · 7 Oct 2017, 17:36

I set the trigger height(Z-0.447), yet it doesn't change anything. When I start printing, Z height is still too low; I need to use baby step to raise Z to 0.35 to get optimal prints.
My new config.g, after setting the trigger height:

; Configuration file for Duet WiFi (firmware version 1.17)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool on Thu Aug 17 2017 23:56:06 GMT+0200 (ora solare Europa occidentale)

; General preferences
M111 S0 ; Debugging off
G21 ; Work in millimetres
G90 ; Send absolute coordinates…
M83 ; ...but relative extruder moves
M555 P2 ; Set firmware compatibility to look like Marlin

;*** The homed height is deliberately set too high in the following - you will adjust it during calibration.
M665 R139 L360.22 B125 H235 ; Set delta radius, diagonal rod length, printable radius and homed height
M666 X0 Y0 Z0 ; Put your endstop adjustments here, or let auto calibration find them
M208 Z0 S1 ; Set minimum Z
M206 X0 Y0 Z0

; Endstops
M574 X2 Y2 Z2 S1 ; Define active high microswitches
M558 P5 R0.4 F500 H10
G31 P100 X0 Y0 Z-0.447 ; Set Z probe trigger value, offset and trigger height
M557 R105 S20 ; Define mesh grid

; Drives
M569 P0 S1 ; Drive 0 goes forwards
M569 P1 S1 ; Drive 1 goes forwards
M569 P2 S1 ; Drive 2 goes forwards
M569 P3 S1 ; Drive 3 goes forwards
M350 X32 Y32 Z32 E32 I0 ; Configure microstepping without interpolation
M92 X200 Y200 Z200 E172 ; Set steps per mm
M566 X1200 Y1200 Z1200 E1200 ; Set maximum instantaneous speed changes (mm/min)
M203 X12000 Y12000 Z12000 E1200; Set maximum speeds (mm/min)
M201 X1000 Y1000 Z1000 E1000 ; Set accelerations (mm/s^2)
M906 X1100 Y1100 Z1100 E800 I100 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Heaters
M143 S265 ; Set maximum heater temperature to 265C
M301 H0 S1.00 P10 I0.1 D200 T0.4 W180 B30 ; Use PID on bed heater (may require further tuning)
M305 P0 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 0
M305 P1 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 1

; 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

; Network
M550 PDUET DELTA ; Set machine name
M552 S1 ; Enable network
M587 Sfiore_wifi2 P"fiorello1" ; Configure access point. You can delete this line once connected
M586 P0 S1 ; Enable HTTP
M586 P1 S1 ; Enable FTP
M586 P2 S0 ; Disable Telnet

; Fans
M106 P0 S1 I0 F500 H0:1 T60 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P1 S1 I0 F500 H-1 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P2 S1 I0 F500 H0:1 T50 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on

; Custom settings are not configured

; Miscellaneous
M501 ; Load saved parameters from non-volatile memory

flopo · 7 Oct 2017, 19:07

I've solved it. I made an autocalibration with a piece of paper folded three times. Weird, but it solved the problem. Now the height is correct and it prints well.