Homing delta not working, possible configuration issue?
I am configuring my new delta printer, a 1M tall, 500mm side three-tower. I have upgraded my Duet WiFi to 1.20, and my paneldue is still running 1.16. Right now I am just working out the kinematics of the machine, so I have not connected the fans, extruder motor, extruder heater, thermistor, bed heater, or the IR probe.
Since I will be using an IR probe, I deleted the files related to deploying the probe as documented in 1.19's Changelog.
When I press the "Home" button on the PanelDue, or send G28, the three delta carriages move up about 1-2mm, and then nothing else happens. Every G28/Home Press moves them up a little bit more, but the carriages do not act as they should. I am using Kysan bipolar 1.8 degree steppers @24V, 16 microsteps, 48T pulleys, and GT2 belts. My configured axis steps/mm is therefore 33.33 steps per mm. (200*16)/48/2
As far as I can tell, the steppers are moving smoothly and quietly, in the correct direction… I'm just not seeing the right behavior.
The configuration files in sys:
My config.g is:
[[language]] M550 PMartinDelta ; Machine name and Netbios name (can be anything you like) M551 Preprap ; Machine password (used for FTP) ;*** If you have more than one Duet on your network, they must all have different MAC addresses, so change the last digits M540 P0xBE:0xEF:0xDE:0xAD:0xa3:0x22 ; MAC Address ;*** Wifi Networking M552 S1 ; Enable WiFi M555 P2 ; Set output to look like Marlin M575 P1 B57600 S1 ; Comms parameters for PanelDue G21 ; Work in millimetres G90 ; Send absolute coordinates... M83 ; ...but relative extruder moves ; Axis and motor configuration 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 M569 P4 S1 ; Drive 4 goes forwards M574 X2 Y2 Z2 S1 ; set endstop configuration (all endstops at high end, active high) ;*** The homed height is deliberately set too high in the following - you will adjust it during calibration M665 L256 R431.8 H500 B155 X0 Y0 ; 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 M350 X16 Y16 E16 I1 ; Set 16x microstepping with interpolation M92 X33.33 Y33.33 Z33.33 ; Set axis steps/mm M906 X1200 Y1200 Z1200 E800 I60 ; Set motor currents (mA) and increase idle current to 60% M201 X1000 Y1000 Z1000 E1000 ; Accelerations (mm/s^2) M203 X20000 Y20000 Z20000 E3600 ; Maximum speeds (mm/min) M566 X1200 Y1200 Z1200 E1200 ; Maximum instant speed changes mm/minute ; Thermistors ; M305 P0 T100000 B3950 R4700 H30 L0 ; Put your own H and/or L values here to set the bed thermistor ADC correction ; M305 P1 T100000 B3974 R4700 H30 L0 ; Put your own H and/or L values here to set the first nozzle thermistor ADC correction ; M570 S180 ; Hot end may be a little slow to heat up so allow it 180 seconds ; Fans ; M106 P1 T50 H1 ; Fan 1 turns on at 50C, cools hotend ; M106 P2 H-1 ; M106 P3 H-1 ; Tool definitions ; M563 P0 D0 H1 ; Define tool 0 ; G10 P0 S0 R0 ; Set tool 0 operating and standby temperatures ;*** If you have a single-nozzle build, comment the next 2 lines ;M563 P1 D1 H2 ; Define tool 1 ;G10 P1 S0 R0 ; Set tool 1 operating and standby temperatures ; M92 E663:663 ; Set extruder steps per mm ; Z probe and compensation definition ;*** If you have a switch instead of an IR probe, change P1 to P4 in the following M558 command M558 P1 X0 Y0 Z0 ; Z probe is an IR probe and is not used for homing any axes G31 X0 Y0 Z4.80 P500 ; Set the zprobe height and threshold (put your own values here) ;*** If you are using axis compensation, put the figures in the following command M556 S78 X0 Y0 Z0 ; Axis compensation here M208 S1 Z-0.2 ; set minimum Z ; ;T0 ; select first hot end
My homedelta.g is:
[[language]] ; Homing file for RepRapFirmware on Mini Kossel G91 ; use relative positioning G1 S1 X500 Y500 Z500 F2500 ; move all carriages up 320mm, stopping at the endstops G1 S2 X-3 Y-3 Z-3 ; move all carriages down 3mm G1 S1 X6 Y6 Z6 F250 ; move carriages slowly up 6mm, stopping at the endstops G1 Z-5 F2000 ; down a few mm so that we can centre the head G90 ; back to absolute positioning G1 X0 Y0 F2000 ; centre the head and set a reasonable feed rate
Fiigured it out… two of the axes endstops were swapped ( Y/Z ) and didn't go to the corresponding motors., and because I was using Maker Mechanical 1.2 endstops, the logic was reversed ( S0 vs S1 )
Now that is fixed, I still have one more mysterious issue. I can run G28 and the machine homes, BUT afterwards I can't get any G0/G1 moves to work, and there are no errors on the console of the paneldue.
I go into relative mode, then try to instruct the machine to drop down 50mm :
G1 Z-10 F2000
Nada. No errors, just no movement.
I can do G92 X0 Y0 Z360 ( the actual height of my towers to the bed ) and it works
I can do G91 and run the TOWERS.. i.e. ( G91 S1 X-50 Y-50 Z-50 F2500 ) and the towers move
I just can't do G91, then G1 Z-10 F2000 for example … no movement, but also no errors
There is an error in your M665 command. The combination of L and R you have specified is physically impossible. Your R (delta radius) parameter looks to me to be about double what it should be, perhaps more than double.
number40fan last edited by
Increase the X, Y and Z in G1 S1 X500 Y500 Z500 F2500 in your homedelta to 800+ so you don't have to double tap home when you are stretched out on the build plate.