Carriage won't reach bed

droftarts

@norwestie see https://duet3d.dozuki.com/Wiki/Calibrating_a_delta_printer
The H parameter in M665 sets the Z height. As it says in the above guide:

H = height of the nozzle above the bed when all three carriages are just high enough to trigger the endstop switches. Measure it as best you can, to within about 5mm. Calibration will adjust it.

Ian

norwestie

@droftarts Thank you!

Phaedrux

As it's a delta, your homing file is homedelta.g not homeall.g

norwestie

@phaedrux I commented out the commands to drop the carriage after homing, measured and changed the distance from bed to homed position and attempted to lower again. Send the M208 and tried to get the probe to the bed but again it wouldn't go all the way down. It stopped about 40mm above. What am I doing wrong?

Phaedrux

@norwestie said in Carriage won't reach bed:

What am I doing wrong?

I don't know. Show us your files.

norwestie

@phaedrux Here is home delta.g:
; homedelta.g
; called to home all towers on a delta printer
;
; generated by RepRapFirmware Configuration Tool v3.2.3 on Mon Apr 26 2021 15:06:50 GMT-0700 (Pacific Daylight Time)
G91 ; relative positioning
G1 H1 X265 Y265 Z265 F1800 ; move all towers to the high end stopping at the endstops (first pass)
G1 H2 X-5 Y-5 Z-5 F1800 ; go down a few mm
G1 H1 X10 Y10 Z10 F360 ; move all towers up once more (second pass)
G1 Z-5 F6000 ; move down a few mm so that the nozzle can be centred
G90 ; absolute positioning
G1 X0 Y0 F6000 ; move X+Y to the centre

and config.g:
; Configuration file for Duet 3 Mini 5+ (firmware version 3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.2.3 on Mon Apr 26 2021 15:06:50 GMT-0700 (Pacific Daylight Time)

; General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"Kossel" ; set printer name
M665 R134.4 L271.5 B116 H283 ; 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

; 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 P0.0 S0 ; physical drive 0.0 goes backwards
M569 P0.1 S0 ; physical drive 0.1 goes backwards
M569 P0.2 S0 ; physical drive 0.2 goes backwards
M569 P0.3 S0 ; physical drive 0.3 goes backwards
M584 X0.0 Y0.1 Z0.2 E0.3 ; set drive mapping
M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
M92 X80.00 Y80.00 Z80.00 E98.60 ; set steps per mm
M566 X1200.00 Y1200.00 Z1200.00 E300.00 ; set maximum instantaneous speed changes (mm/min)
M203 X18000.00 Y18000.00 Z18000.00 E1200.00 ; set maximum speeds (mm/min)
M201 X1000.00 Y1000.00 Z1000.00 E1000.00 ; set accelerations (mm/s^2)
M906 X1000 Y1000 Z1000 E800 I30 ; set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Axis Limits
M208 Z0 S1 ; set minimum Z

; Endstops
M574 X2 S1 P"io0.in" ; configure active-high endstop for high end on X via pin io0.in
M574 Y2 S1 P"io1.in" ; configure active-high endstop for high end on Y via pin io1.in
M574 Z2 S1 P"io2.in" ; configure active-high endstop for high end on Z via pin io2.in

; Z-Probe
M558 P4 R0.4 H3 F300 T1000 ; set Z probe type to switch and the dive height + speeds
G31 P500 X0 Y0 Z2.5 ; set Z probe trigger value, offset and trigger height
M557 R85 S20 ; define mesh grid

; Heaters
M308 S0 P"temp0" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out0" T0 ; create bed heater output on out0 and map it to sensor 0
M307 H0 R0.172 C503.9 D0.21 S1.00 V11.9 ; 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"temp1" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin temp1
M950 H1 C"out1" T1 ; create nozzle heater output on out1 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

; Fans
M950 F0 C"out3" Q500 ; create fan 0 on pin out3 and set its frequency
M106 P0 S0 H-1 ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"out4" Q500 ; create fan 1 on pin out4 and set its frequency
M106 P1 S1 H1 T45 ; set fan 1 value. Thermostatic control is turned on

; Tools
M563 P0 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

; Custom settings are not defined
M501

droftarts

@norwestie What's in your config_override.g? You have an M501 to load it, and it's probably overriding the settings in config.g.

Ian

norwestie

@droftarts
; config-override.g file generated in response to M500 at 2021-05-09 09:34
; This is a system-generated file - do not edit
; Delta parameters
M665 L271.500:271.500:271.500 R134.400 H260.000 B116.0 X0.000 Y0.000 Z0.000
M666 X0.000 Y0.000 Z0.000 A0.00 B0.00
; Heater model parameters
M307 H0 R0.172 C503.900:503.900 D0.21 S1.00 V11.9 B0
M307 H1 R2.429 C140.000:140.000 D5.50 S1.00 V0.0 B0
; Workplace coordinates
G10 L2 P1 X0.00 Y0.00 Z0.00
G10 L2 P2 X0.00 Y0.00 Z0.00
G10 L2 P3 X0.00 Y0.00 Z0.00
G10 L2 P4 X0.00 Y0.00 Z0.00
G10 L2 P5 X0.00 Y0.00 Z0.00
G10 L2 P6 X0.00 Y0.00 Z0.00
G10 L2 P7 X0.00 Y0.00 Z0.00
G10 L2 P8 X0.00 Y0.00 Z0.00
G10 L2 P9 X0.00 Y0.00 Z0.00
M486 S-1

droftarts

@norwestie it’s the M665 … H260 in config_override.g that’s overriding the value set in config.g. Start the Duet, then send M665, which will report the current setting. H will be 260. Send (same as in config):

M665 R134.4 L271.5 B116 H283

Then M665 again to check. Then send M500 to save a new config_override.g with this setting.

Alternatively, remove the M501 from config.g, which stops the override being run. But any calibration changes will need to be copied into config.g manually. Easiest way to do that is to run calibration, save calibration with M500, then copy the bits that you want from config_override to config.g.

Ian

norwestie

@droftarts said in Carriage won't reach bed:

M665 R134.4 L271.5 B116 H283

Thank you again. This is all Greek to me so I rely heavily to you and the community for help.

Gaou

@norwestie said in Carriage won't reach bed:

@droftarts said in Carriage won't reach bed:

M665 R134.4 L271.5 B116 H283

Thank you again. This is all Greek to me so I rely heavily to you and the community for help.

i am greek and most of these looks greek to me to ....

the M665 is what defines a printer as a delta to my understanding.

M665 Rxxx( is the radious of ur builded printer the internal one), Lxxx( the length of the rods that hold ur effectors) Bxxx( is the radious of ur bed) abd Hxxx( is the height of ur nozzle to the bed when the limit switces are enabled) .