Homed Height

dc42

You should not need to use any H parameters on the G30 commands in bed.g when using the Smart Effector, or any other nozzle contact bed probe.
When running auto calibration for the first time, increase the M558 H parameter as recommended in the wiki page on delta calibration.
If your homed height has come out at 600mm but is in reality less than this, perhaps you have the wrong steps/mm set in config.g? 80 steps/mm is correct for 1.8deg motors used with 20-tooth GT pulleys.
You should calibrate at least 4 parameters (not 3) and preferably 6.

bulka

ok ..my step motors are 0.9 ...I think I should double the value and use 160

dc42

@bulka said in Homed Height:

ok ..my step motors are 0.9 ...I think I should double the value and use 160

Yes, if you are using 20-tooth pulleys. If your pulleys are 16-tooth then it should be 200.

bulka

yes is a pulley 20T. thx

I corrected the config file and now the H is what I measured:

; General preferences
G90 ; Send absolute coordinates...
M83 ; ...but relative extruder moves
M555 P1 ; Set firmware compatibility to look like RepRapFirmare
M665 R55.41 L355.00 H366.75 B170.00
M666 X0 Y0 Z0

; Drives
M569 P0 S0 ; Drive 0 goes forwards
M569 P1 S0 ; Drive 1 goes forwards
M569 P2 S1 ; Drive 2 goes forwards
M569 P3 S1 ; Drive 3 goes forwards
M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
M92 X160 Y160 Z160 E663 ; Set steps per mm
M566 X2400 Y2400 Z2400 E1200 ; Set maximum instantaneous speed changes (mm/min)
M203 X36000 Y36000 Z36000 E1200 ; Set maximum speeds (mm/min)
M201 X1000 Y1000 Z1000 E1000 ; Set accelerations (mm/s^2)
M906 X1200 Y1200 Z1200 E700 I60 ; Set motor currents (mA) and motor idle factor in per cent
M84 S15 ; Set idle timeout

; Axis Limits
M208 Z0 S1 ; Set minimum Z

; Endstops
M574 X2 Y2 Z2 S1 ; Set active high endstops

; Z-Probe
M558 P5 R0.4 H5 F120 T6000 ; Set Z probe type to effector and the dive height + speeds
G31 P100 X0 Y0 Z-0.252 ; Set Z probe trigger value, offset and trigger height
M557 R85 S20 ; Define mesh grid

; Heaters
M305 P0 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 0
M143 H0 S100 ; Set temperature limit for heater 0 to 100C
M305 P1 X200 ; Configure thermocouple for heater 1
M143 H1 S330 ; Set temperature limit for heater 1 to 330C

; Fans
M106 P0 S0.3 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P1 S1 I0 F500 H1 T40 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on
M106 P2 S1 I0 F500 H1 T40 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on

; Tools
M563 P0 D 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

bulka

I changed the calibration on bed config file using :http://www.escher3d.com/pages/wizards/wizardbed.php

bulka

@bulka said in Homed Height:

M665 R55.41 L355.00 H366.75 B170.00

what I'm not sure about this command ... the parameter R and L ( don't kill me )

I don't understood perfectly how to calculate it...

I changed the M558 as suggested in the wiki ( and by you ) to M558 P5 R0.4 H20 F120 T6000

dc42

@bulka said in Homed Height:

@bulka said in Homed Height:

M665 R55.41 L355.00 H366.75 B170.00

what I'm not sure about this command ... the parameter R and L ( don't kill me )

I don't understood perfectly how to calculate it...

I changed the M558 as suggested in the wiki ( and by you ) to M558 P5 R0.4 H20 F120 T6000

L is the rod length measured between bearing centres. If you are using Haydn Huntley's magnetic rods, each rod carries a label on which its length is written, so use that figure.

R is the delta radius. The exact value will be found by calibration, so you need to provide only an approximate value. Use the horizontal distance subtended by any rod, measured between bearing centres, when the effector is central.

bulka

ok.
changed to:
M665 R168 L360 H366.75 B170.00
M666 X0 Y0 Z0

I'll try to start auto calibration

bulka

Calibrated 6 factors using 16 points, deviation before 1.322 after 0.029

bulka

change calibration to 7 factor:

Calibrated 7 factors using 16 points, deviation before 1.201 after 0.016

Dougal1957

@bulka not wise to use 7 factor if you know your rod length properly use either 6 or 8

bulka

ok, I read after your answer on wiki: " typical delta printer builds, 6-factor is best"

Changed beg config file:

13:21:29
Calibrated 6 factors using 16 points, deviation before 0.017 after 0.014

13:23:13
M665
Diagonal 363.663, delta radius 173.193, homed height 366.386, bed radius 170.0, X -0.034°, Y -0.209°, Z 0.000°

13:23:09
M666
Endstop adjustments X0.20 Y0.83 Z-1.03, tilt X0.00% Y0.00%

If I'm not wrong...after calibration....the Diagonal was changed....it's wrong to use 6 factors using 16 points?

Dougal1957

@bulka the drag rod length was changed by the previous 7 factor cal you need to manually reset the rod length and run it again with either 6 or 8 factor cal

bulka

done thank you

thank you DC