Duet 3 - Motors only respond properly duing the home command
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@JoergS5 said in Duet 3 - Motors only respond properly duing the home command:
G1 H1 X815 F180
After your last suggestion I started messing around with the motor speeds and the micro stepping and have managed to get all the motors moving when commands are sent.
I have had to lower the motor speeds down dramatically otherwise the motors would stall. I'm assuming this is because the Nema 17 motors aren't big enough for the setup on my printer.This is my latest config.g file that seems to be working, do you see anything that might be causing this problem other than the motor size?
; Configuration file for Duet 3 (firmware version 3)
; executed by the firmware on start-up
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; generated by RepRapFirmware Configuration Tool v3.1.1 on Sat May 30 2020 16:16:49 GMT-0700 (Pacific Daylight Time); General preferences
G90 ; send absolute coordinates...
M83 ; ...but relative extruder moves
M550 P"OLIVER3DPRINTER" ; set printer name
M665 R224.25 L573.75 B200 H500 ; 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 P0.5 S1 ; physical drive 0.5 goes forwards
M569 P0.4 S1 ; physical drive 0.4 goes forwards
M569 P0.3 S1 ; physical drive 0.3 goes forwards
M569 P0.0 S1 ; physical drive 0.0 goes forwards
M584 X0.5 Y0.4 Z0.3 E0.0 ; set drive mapping
M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation
M92 X640.00 Y640.00 Z640.00 E837.20 ; set steps per mm
M566 X1200.00 Y1200.00 Z1200.00 E1200.00 ; set maximum instantaneous speed changes (mm/min)
M203 X1500.00 Y1500.00 Z1500.00 E1200.00 ; set maximum speeds (mm/min)
M201 X20.00 Y20.00 Z20.00 E1000.00 ; set accelerations (mm/s^2)
M906 X2000 Y2000 Z2000 E800 I50 ; 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"io1.in" ; configure active-high endstop for high end on X via pin io1.in
M574 Y2 S1 P"io4.in" ; configure active-high endstop for high end on Y via pin io4.in
M574 Z2 S1 P"io3.in" ; configure active-high endstop for high end on Z via pin io3.in; Z-Probe
M558 P0 H5 F120 T6000 ; disable Z probe but set dive height, probe speed and travel speed
M556 S50 X0 Y0 Z0 ; set orthogonal axis compensation parameters
M557 R200 S50 ; define mesh grid; Heaters
M308 S0 P"temp1" Y"pt1000" R2200 ; configure sensor 0 as PT1000 on pin temp1
M950 H0 C"out1" T0 ; create bed heater output on out1 and map it to sensor 0
M307 H0 B1 S1.00 ; enable 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"temp2" Y"pt1000" R2200 ; configure sensor 1 as PT1000 on pin temp2
M950 H1 C"out2" T1 ; create nozzle heater output on out2 and map it to sensor 1
M307 H1 B0 S1.00 ; disable bang-bang mode for heater and set PWM limit; 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"out5" Q500 ; create fan 1 on pin out5 and set its frequency
M106 P1 S1 H1 T45 ; set fan 1 value. Thermostatic control is turned on; Tools
M563 P0 S"TITAM AQUA" 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
M575 P1 B57600 S1; Miscellaneous
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss -
@Oliver3d said in Duet 3 - Motors only respond properly duing the home command:
It looks like you have a set of config files in the root of the SD card. Those should all be in the /sys folder. If you are editing the files in the root of the card they won't be used at all.
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First of all I am relieved that the cause is now clear.
Phaedrux comment is of course correct and I'm a bit annoyed at myself for not having seen it yesterday! The configurator and upload process put it into the correct sys folder, so those changes were working, but you may have changed something in the root folder which was ineffective...
Your used ball screws are heavy, so to move the higher mass I would prefer Nema 23 steppers. I see the following further possible improvements
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the coupling between stepper and ball screw is not very stiff, it is better to use so called Oldham couplers (two aluminium parts separated by a plastic part, AKA Rotex, jaw coupling). The most expensive and very stiff coupling would be a "metal bellows coupling", but I haven't seen it at 3D printers yet. Another possibility is a belt coupling. The advantage is that you could introduce a gear ratio for a higher torque if you need it (but needs some space). A direct stiff steel coupling is another possibility, but then the stepper and ball screw axes must match exactly to avoid damage.
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the ball screw spindle should be fixed at the bottom with a loose bearing (floating bearing) each, otherwise the ball screw spindle will "try to escape the force" and will bend (only a bit in the region of micrometers, but I expect this will have an effect. Ball spindle bearings have a high precision, it would be a pity if they were lost again due to bending.) Another effect will be that the spindle begins to vibrate with some stepper speed, which will produce vibrations in the whole construction.
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The files in the root of the SD card I was just storing as a backup. The ones I was editing were in the sys folder.
Now that I know the electronics work with limited speed I will focus on finishing the mechanical parts like mounting the end bearings for the ball screws, finishing. The print bed and fitting the hot end and tool changer.
I hand noticed that the motor couplers weren’t very good quality so I’m going to order some Nema 23 motors and good quality couplers hopefully that will get the speed up.
I’ll keep you posted with the progress and I really appreciate all the help.
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@Oliver3d
I am curious to see how good the printer will be and I am looking forward to the printouts. Good luck!
