I need some help!

cyoung

Have you seen this? https://duet3d.dozuki.com/

Particularly this? https://duet3d.dozuki.com/Wiki/ConfiguringRepRapFirmwareCartesianPrinter

I have seen both of those. I didnt read through your second link entirely, but perhaps i need to. I was hoping not to have to get that far down in the weeds.

It sounds like you have some wiring issues.

How do you have the Paneldue connected?

The paneldue is connected via the 4 wire molex connector, not the ribbon cable.

The motor behaviour you describe definitely sounds like either a bad crimp connection or wire pairs not correct.

I dont think its a bad crimp connection since it does it on all of the steppers. Surely I'd get at least one correct, right? How do I check to see if the wire pairs are correct or not?

Are you sure that your Z steps per mm is 4000?

No, its not 4000. When I tell it to move 1mm, it goes way more than that. I was going to get it work correctly then fix the steps/mm issue. I need it to stop stuttering and move up and down, not just down (away from print head).

Does your Z axis home to Z max or Z Min?

Zmin (endstop is triggered when bed is closest to extruder nozzle.)

Can you post your homing files as well?

2_1531081401489_homez.g 1_1531081401489_homey.g 0_1531081401489_homex.g

If you're currently not using a Z probe you should comment out the Z-Probe lines in the config for now by adding a semi-colon ( ; ) in front of them. M558, G31, M557

I will do this.

cyoung

If you're currently not using a Z probe you should comment out the Z-Probe lines in the config for now by adding a semi-colon ( ; ) in front of them. M558, G31, M557

I commented those lines out, saved the config file and rebooted the board. The stepper seemed to be working correctly (in the sense that its moving the way I tell it), but after a second reboot, its gone back to stuttering.

cyoung

Also, not sure if it matters or not, but I am running a 24v PSU on the board and steppers.

Phaedrux

@cyoung said in I need some help!:

I was hoping not to have to get that far down in the weeds.

Far from it. Following the setup guide will save you a great deal of trouble.

For the stepper wiring I just followed the color coding of the stepper wires and the wiring diagram of Duet. But you can manually verify the pairs by checking for continuity with a multimeter.

You can also use the continuity testing function to verify if your crimps are good.

For the paneldue cable make sure it's connected the right way round. https://duet3d.dozuki.com/Wiki/Connecting_an_LCD_control_panel#Section_Option_2_4_way_cable

Phaedrux

Your Z home file is setup to work as though you have a Z Probe.

Comment out the G30 probe bed command and replace it with

G91 ; relative movement
G1 S1 Z-400 F600 ; Move Z axis to endstop

Again, all of these details are in the cartesian printer setup guide.

cyoung

@phaedrux said in I need some help!:

Your Z home file is setup to work as though you have a Z Probe.

Comment out the G30 probe bed command and replace it with

G91 ; relative movement
G1 S1 Z-400 F600 ; Move Z axis to endstop

Again, all of these details are in the cartesian printer setup guide.

Sorry, not trying to waste your time, but I havent been able to read the guides and get through this.

I did this, no help. I am reading through the cartesian setup guide more carefully. My main config file matches what the setup guide says for the general preference and for the movement section.

When I try to home y or z, i get movement out of both steppers! (stuttering)

cyoung

I just checked the wire pairs on the steppers and as far as I can tell, they are correct.

Phaedrux

No worries, I don't mind helping to solve problems, but a lot of the basic setup is covered in the documentation far better than I can describe.

After you've made the motors stutter, run an M122 command in the console and paste the contents here.

dc42

Panel Due running but not connecting. The usual causes are:

bad connection in the Din or Dout wire of the 4-pin cable
Din and Dout wires swapped
mismatched baud rates. Both default to 57600 but both can be changed.

Stepper motors not moving. Usual causes:

Bad crimp connection between the cable and the connector.
unsuitable current setting. Please provide a link to the datasheet for your stepper motors.
trying to move the motor too fast or accelerate it too fast. Use low M201 and M203 parameters until your printer is working.
Wires not paired correctly into phases. In this case the motor will vibrate loudly.
blown driver.

cyoung

@phaedrux said in I need some help!:

No worries, I don't mind helping to solve problems, but a lot of the basic setup is covered in the documentation far better than I can describe.

After you've made the motors stutter, run an M122 command in the console and paste the contents here.

M122
=== Diagnostics ===
Used output buffers: 3 of 32 (10 max)
=== Platform ===
RepRapFirmware for Duet WiFi version 1.19 running on Duet WiFi 1.0
Board ID: 08DDM-9FAM2-LW4SD-6JKF0-3SN6L-T2ZMY
Static ram used: 21176
Dynamic ram used: 95928
Recycled dynamic ram: 1680
Stack ram used: 1304 current, 4840 maximum
Never used ram: 7448
Last reset 00:00:18 ago, cause: power up
Last software reset reason: User, spinning module GCodes, available RAM 7448 bytes (slot 2)
Software reset code 0x0003, HFSR 0x00000000, CFSR 0x00000000, ICSR 0x00400000, BFAR 0xe000ed38, SP 0xffffffff
Error status: 0
Free file entries: 10
SD card 0 detected, interface speed: 20.0MBytes/sec
SD card longest block write time: 0.0ms
MCU temperature: min 25.2, current 29.2, max 29.4
Supply voltage: min 24.0, current 24.2, max 24.5, under voltage events: 0, over voltage events: 0
Driver 0: standstill
Driver 1: standstill
Driver 2: standstill
Driver 3: standstill
Driver 4: standstill
Date/time: 2018-07-08 15:31:31
Slowest main loop (seconds): 0.008299; fastest: 0.000034
=== Move ===
MaxReps: 0, StepErrors: 0, FreeDm: 240, MinFreeDm 240, MaxWait: 0ms, Underruns: 0, 0
Scheduled moves: 0, completed moves: 0
Bed compensation in use: none
Bed probe heights: 0.000 0.000 0.000 0.000 0.000
=== Heat ===
Bed heater = 0, chamber heater = -1
=== GCodes ===
Segments left: 0
Stack records: 1 allocated, 0 in use
Movement lock held by null
http is idle in state(s) 0
telnet is idle in state(s) 0
file is idle in state(s) 0
serial is idle in state(s) 0
aux is idle in state(s) 0
daemon is idle in state(s) 0
queue is idle in state(s) 0
autopause is idle in state(s) 0
Code queue is empty.
Network state is running
WiFi module is connected to access point
WiFi firmware version 1.19
WiFi MAC address 5c:cf:7f:a4:a2:4c
WiFi Vcc 3.13, reset reason Turned on by main processor
WiFi flash size 4194304, free heap 39360
WiFi IP address 192.168.2.114
WiFi signal strength -76dBm
HTTP sessions: 1 of 8
Socket states: 2 0 0 0 0 0 0 0
Responder states: HTTP(1) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0)

cyoung

@dc42 said in I need some help!:

unsuitable current setting. Please provide a link to the datasheet for your stepper motors.

I dont have a data sheet handy. The steppers came with a folgertech printer kit. I've looked at their website but cant find any technical info on the steppers. There is a no part number on the motor. I could try to email them and get a data sheet.

dc42

My understanding is that Folgertech used 12V 0.4A motors on their early kits. That was a terrible choice and if you have those motors, your best bet is to replace them. You could try reducing the motor current to 400mA in case that improves things.

In later kits, I understand they supplied more suitable motors for 3D printer use.

cyoung

I have 2 steppers motors for the y axis, they are wired to each other and plugged into the y driver on the board.

I'm not sure this wire is assembled correctly. On y stepper 1, paired wires 1a and 1b dont connect to 1a and 1b on y stepper 2.

This is what the wiring looks like for the y steppers.
0_1531086261105_Y STEPPER WIRNIG.png

Before I added the duet hardware, I was running an MKS board with Marlin on it and the printer worked correctly. All of the wiring and other components that arent Duet are reused from the MKS setup. I had to swap some pins on the e-stop connectors but everything else (wiring wise) is unchanged.

cyoung

@dc42 said in I need some help!:

My understanding is that Folgertech used 12V 0.4A motors on their early kits. That was a terrible choice and if you have those motors, your best bet is to replace them. You could try reducing the motor current to 400mA in case that improves things.

On the stepper motor, it says "1.8deg 5.0kg/cm 1.5A"

Ill try lowering the current and see what happens.

dc42

If they are rated at 1.5A then they should be ok.

cyoung

So I got the paneldue to work. There was a bad crimp on one of the pins in the plug. So at least one issue is sorted. Still havent been able to figure anything out with getting the steppers to work the right way.

dc42

The X and Z motor issues are probably also caused by bad crimp connections, if the motors really are rated at 1.5A and you have set the steps/mm about right. The error message when you command Y movement suggests a short in the wiring or a faulty driver.

cyoung

So worked on the printer some more yesterday. I took one of the legs off the 2 stepper motor wiring harnesss for the y axis. Used this harness (with a junction block in the middle) and the motor works correctly! I can plug any stepper into any axis on the board and, as long as i use this specific wiring harness, the stepper works as expected. I tried a few other things and I am now under the impression that I need to rewire the steppers. We tested the "bad wires" every way we could with a multi-meter. Conductivty, resistance, cross-talk/shorts....we couldnt find anything wrong with the bad wires. Not sure what that means but Im thinking Ill try rewiring and see how that turns out.

Even the Y axis works in this setup so I'm hopeful that I dont have a blown driver.