Z axis - No movement at all, Maslow 4.1

Hi all,
Got my 4.1 kit in Australia this week, have it all put together, updated the firmware, index and maslow.yaml files but the Z axis won’t jog at all, here’s some notes:

  • Updated firmware using the full installer to most recent version
  • Tried all the usual rebooting, unplug replug etc
  • Steppers aren’t getting hot or making any noise, they’re easy to move by hand when it’s trying to jog
  • No errors or messages in the serial
  • Fan runs when trying to jog
  • Have tried different home positions, different jog distances
  • Have re-uploaded the yaml file heaps of times
    Any help is appreciated

Cheers

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It might be useful to check the voltage going into the steppers. An LED would give you a Yes/No indication, but a voltmeter (preferably analog) might provide useful readings.

Alternatively, you might be able to get useful current readings, which could tell you about bottoming out, open connections, stuck mechanisms, etc.

Q: What electrical (etc) readings can the onboard computer report?

Are you able to jog in the XY direction? It’s just the z-axis which isn’t moving?

I havent tried calibrating or anything, will give it a crack this arvo, i was able to retract the belts no problems

Can confirm that the calibration completed successfully and i can jog the machine in the X and Y axis but still cant move it at all in the Z axis.

Not sure if it is related but i also dont have the blue blinking LED on the control board for the IP address.

Anyone have any suggestions at all? I’m happy to reflow some solder or get tinkering, otherwise I’m just sitting here with an expensive paper weight

what firmware version do you have? I think 1.0.3 is the most current

I think @bar may have to chime in on this.

the only time (other than a couple bad boards) that we’ve seen this is when it’s
been a bad maslow.yaml file

David Lang
k

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I updated the firmware, Index and YAML files to 1.03 before i started trying anything. Have tried deleting and re-uploading different YAML files too. Guess it might be a bad board…

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New build here too - I have a similar-ish issue.
Couldn’t help but roar ‘she’s alive’ when switching it on the first time!

Updated directly to 1.03 - only one Z height stepper is working. Switched cable sides (so front Z height stepper is plugged into the rear socket, and tested both ways. My board doesn’t seem to control the Z height stepper from the rear socket.

Also, was able to extend all the belts with assistance from the motors, but when clicking retract all, only the bottom right belt retracts, the others just stay idle.

** edit - I increased the retraction value to 1400 and they’re all now reliably retracting. No go on the second Z stepper yet though.

** Edit 2 - I was able to get the second stepper motor working by changing the setting /axes/z/motor1/tmc_2209/uart_num to 2, instead of 1. Out of the box, they were both set to 1.
Have I done OK? Uart 2 isn’t used for anything else?

Cheers

2 Likes

I have a board that needs to be left on for a few minutes and then it moves the two Z motors, but it drove me crazy that it coincided with some adjustment and I declared victory but it fails again, so now I wait a while for it to heat up and it works, I have another board that doesn’t move even after waiting a while, I did the step you describe with the Uart and it didn’t solve my problem
Edit: Well, the truth is that I can’t edit the data, they don’t stay in memory when I restart. I’m using version .88 and I’m trying to make changes via Wi-Fi.

I’m sorry about the slow response, I was out of town this weekend and I’m just not getting back up to speed.

You can reflow the stepper motor driver chip, it will be one of these:

In the meantime I’d recommend ordering a free replacement from our website. I will DM you a code right now.

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This is super interesting! Is it repeatable? Like if you change it back to 1 does one stop working?

Sadly this morning I went in to try and it’s no longer working on Uart 1 or 2 - the same back controller seems dead.
Could this be a faulty board? - should I send my config?

*** Edit - @bar OK so after trying both Uart 1 and 2 and being unable to get any movement from the second stepper, I just left the board powered up for a few hours, came back and without any changes it now works as it should. I’m guessing a dry joint somewhere that fixes itself when the board warms up?

Unfortunately I don’t have a way of reflowing solder, especially an IC - other than chucking the whole thing in an oven…

Cheers

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Barry Ralphs wrote:

I was able to lower the router when I was on v0.88. I’ve now updated to v1.03,
so I don’t know if it’s related to stepper motor driver chip issue or the
update.

if it worked on the old version, but not the new one, I would look at the
maslow.haml file and see what’s different.

David Lang

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Let me look into this a little bit, maybe there is something software related that is causing this issue and it just seems like hardware

Would anyone who has a board with this issue be willing to try playing with these settings and see if they have any impact?

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I’m having the same issue. I checked the values you showed and they were already set as shown for both motor 0 and motor 1. I partially took unit apart thinking there was a binding issue. The stepper driver closest to power cord works fine with either stepper motor. The other works sometimes - even when router is not connected and the stepper motor is just driving itself.

I’ve played with the run amps on both motors thinking it could be a slight issue with one being a bit stiffer than the other, but it didn’t make a difference on mine. I didn’t touch the hold amps though, what does that do?

Very happy to experiment.

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Actually - on this, I know it’s hard to troubleshoot these things by proxy, so if it’s helpful, you can FaceTime in to a video feed of the machine, remote control my browser and I can be your hands on the ground if you want to tinker. :+1:

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Messing with these numbers didnt do anything for mine either. Mine doesnt try to move at all, no sound, doesnt heat up, motors are still easy to move by hand when jogging etc. Ive ordered the new board, hopefully it does the trick

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