Duet2 V1.04. Motor not energized but steps seen on oscilloscope

dc42

Please check the motor currents, by sending command M906 without parameters, and M913 without parameters
Post your config.g file.

A Former User

Thank you for your help. Additional information, when I monitor the 24 volt current on my power supply it is about 100mA.
My motor is a Current/phase: 2.8A, Voltage: 3.2V, Phase Resistance: 1.13ohm, Inductance: 5.4mH ± 20%(1KHz).
Wiring on 4 pin connector is AABB. Confirmed motor phase wiring with ohmeter.

The information you asked for:

M906 response:
Motor current (mA) - X:2000, Y:2000, Z:2000, E:2000:2000, idle factor 0%
ok

M913 response:
Motor current % of normal - X:100, Y:100, Z:100, E100
ok

config.g file:
; Configuration file for Duet WiFi (firmware version 1.21)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v2 on Wed May 22 2019 17:26:42 GMT-0700 (Pacific Daylight Time)

; General preferences
G90 ; Send absolute coordinates...
M83 ; ...but relative extruder moves
M665 R105.6 L215 B85 H250 ; 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
M550 P"MiniKossel" ; Set machine name
M540 PBE:EF:DE:AD:FE:ED ; Set custom MAC address
M552 S1 ; Enable network
M587 S"2WIRE038" P"5486186830" I192.168.1.81 J192.168.1.254 K255.255.255.0 ; Configure access point and IP addresses. You can delete this line once connected
M586 P0 S1 ; Enable HTTP
M586 P1 S0 ; Disable FTP
M586 P2 S0 ; Disable Telnet

; Drives
M569 P0 S1 ; Physical drive 0 goes forwards
M569 P1 S1 ; Physical drive 1 goes forwards
M569 P2 S1 ; Physical drive 2 goes forwards
M569 P3 S1 ; Physical drive 3 goes forwards
M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
M92 X80.00 Y80.00 Z80.00 E663.00 ; Set steps per mm
M566 X1200.00 Y1200.00 Z1200.00 E1200.00 ; 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 X1000.00 Y1000.00 Z1000.00 E800.00 I30 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Axis Limits
M208 Z-0.1 S1 ; Set minimum Z

; Endstops
M574 X2 Y2 Z2 S0 ; Set active low and disabled endstops

; Z-Probe
M558 P1 H10 F120 T2400 ; Set Z probe type to unmodulated and the dive height + speeds
G31 P500 X11 Y0 Z2 ; Set Z probe trigger value, offset and trigger height
M557 R85 S20 ; Define mesh grid

; Heaters
M305 P0 T100000 B3950 R4700 ; Set thermistor + ADC parameters for heater 0
M143 H0 S120 ; Set temperature limit for heater 0 to 120C
M305 P1 T100000 B4388 R4700 ; Set thermistor + ADC parameters for heater 1
M143 H1 S280 ; Set temperature limit for heater 1 to 280C

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

; 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

; Automatic saving after power loss is not enabled

; Custom settings are not configured

; Miscellaneous
T0 ; Select first tool

Veti

@vbiondo said in Duet2 V1.04. Motor not energized but steps seen on oscilloscope:

Motor current (mA) - X:2000, Y:2000, Z:2000, E:2000:2000, idle factor 0%

M906 X1000.00 Y1000.00 Z1000.00 E800.00 I30 ; Set motor currents (mA) and motor idle factor in per cent

This does not match.
You set the current to 1000 but its reported to be 2000.

do you have a config overwrite?

A Former User

I don't know what a config overwrite would be.
I am trying to learn to use this card.
But my 24 volts power supply ammeter reports only 100mA with or without the motor plugged in.
There is only one motor plugged in, I don't know how there could be any current in an axis that has no motor.

Veti

is there a file called Config-override.g in your sys folder.

A Former User

Thank you for your quick response.

No, there's no Config-override.g.

There's bed, config, homedelta, pause, resume, sleep, stop, tfree0, tpost0 and tpre0.g.

I configured as a MiniKossel, because I'll eventually be using it to control a similar delta printer.

dc42

How have you tried to move the motor? On a delta, the only types of move allowed before the printer has been homed are G1 moves with the S1 or S2 (or H1 or H2) parameter, and only if the machine is in relative movement mode (G91). See https://duet3d.dozuki.com/Wiki/ConfiguringRepRapFirmwareDeltaPrinter#Section_Testing_the_motors_and_endstops_individually.

A Former User

I have tried with home moves, and wtih the S1 parameter as described in your testing the motors individually guide.

As I indicated, I do see step pulses on the X_step pin of the diagnostic pad on the board with my oscilloscope, but of course no movement since the motor has no current.

Thank you for your help.

A Former User

Could I please get a further suggestion for resolving my problem of no motor current on my Duet2?

T3P3Tony

When you home do the other two towers move and just the X not work?

A Former User

Thank you T3P3Tony,

No. No movement on any motors.

I have put a motor into each of the motor connectors and none of them is energized.

My 24 volt power supply shows a draw of about 100mA, but none of the motors is energized.

I have checked the ENN pin of the TMC2660 chips, they are at ground. There is 24 volts at the appropriate pins of the TMC2660s, and 3.3 volts at their supply.

T3P3Tony

@vbiondo please post your homedelta.g

Also when are your endstops showing as being triggered when you look at the machine properties page of settings in Duet Web Control:
https://duet3d.dozuki.com/Wiki/Duet_Web_Control_Manual#Section_Machine_Properties
If you trigger them does the status change?

A Former User

Tony,

My X,Y, and Z endstops show as "No" ( not hit ) unless I short 1&3 of the endstop connector, then they show "Yes."

E0 is opposite, shows as "Yes" unless 1&3 are shorted.

Below is my homedelta.g file. Shouldn't my motors be energized regardless of homedelta?

Thank you.

; homedelta.g
; called to home all towers on a delta printer
;
; generated by RepRapFirmware Configuration Tool v2 on Wed May 22 2019 17:26:42 GMT-0700 (Pacific Daylight Time)
G91 ; relative positioning

;*** Slow homing has been configured. Change F180 to F1800 below when your configuration is working
G1 S1 X265 Y265 Z265 F180 ; move all towers to the high end stopping at the endstops (first pass)
G1 X-5 Y-5 Z-5 F1800 S2 ; go down a few mm
;*** Slow homing has been configured. Change F180 to F360 below when your configuration is working
G1 S1 X10 Y10 Z10 F180 ; move all towers up once more (second pass)
G1 Z-5 F2400 ; move down a few mm so that the nozzle can be centred
G90 ; absolute positioning
G1 X0 Y0 F2400 ; move X+Y to the centre

Veti

how exactly did you determine the phases of your motors?

deckingman

I don't know much about Delta's but @dc42 said above that the only moves allowed before homing are G1 with an S parameter and only if G91 relative is set. Yet the config file shows G90 (absolute).

T3P3Tony

@vbiondo that home delta looks ok to me. If it had been blank or something then maybe the motors would not be energised as they had not received a valid command to home. Although thinking about it you say you have seen the step pulses going to the driver so that does not make sense. I wonder if the ENN line is not switching for all the stepper drivers. See if pin 19 on the steppers is going low when movement is commanded.

@deckingman that's why the homedelta.g switches them to relative before homing them.

MoczikGabor

Does the extruder motor move?

If you can not heat up, use "M302 S1" to allow cold extrusion.

T0
M302 S1
M83
G1 E+100 F500

MoczikGabor

HW check ideas, since you have an oscilloscope:

Do any signal present on TMC's OA1 OA2 OB1 OB2 pins? (during move)
What can you measure between BRA/BRB and GND? 1. Measure resistance without power, 2. check on scope during move.
Between SRA/SRB and GND?
You verified that the TMC's get 24V and the STEP signals. This is where everything gets interesting... But does them get GND?

dc42

Please upgrade your firmware to version 2.02, which will provide better diagnostics.
Please verify that you have continuity from the Duet motor headers right through to your motors. With power off but motors connected, use your multimeter to measure the resistance between the two pins at one end of the X motor connector, by touching the probes on the motor connector spills on the underside of the Duet. It should read a few ohms, the resistance of one motor phase. Then check the resistance between the two pins at the other end of the X motor connector. Likewise you should get a few ohms resistance between. There should be on continuity between any pair of pins on the X motor connector that are not next to each other, or between the two middle pins.

A Former User

@veti
I determined the phases of my motors using an ohmmeter to find the low resistance pairs.

Also, it corresponded to the motor manufacturer's spec sheet.