Z-axis: only one motor works

Troubleshooting
1

Hi all
I received my M4.1 kit, thank you. I was able to assemble it without too much trouble. I only had one question regarding the number of bearings. The kit came in three boxes of 10 bearings, so I didn’t put any under the motor gears.
Can you confirm the number of bearings?

Unfortunately, I have a problem that seems more serious: only one Z-axis motor is working. I swapped the cables between the two motors, and that helped identify the fault: it’s the main board driver.

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2

I will DM you a code for a replacement board right now. I’m sorry for the trouble!

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3

That is correct you don’t need them under the motor gear, you should have 2 spare bearings.

4

Thank you Ian.

5

Thank you Bar,

I received free shipping code but it doesn’t work (free part code is ok)

Shipping price stay at $28 for France.

I will try to repair card myself with a simple pcb reflow or exchange driver TMC2209-LA.

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6

Sounds like I have a similar problem, but it’s weird. One of the z motors isn’t spinning when I move the z height. If I tell the z motors to move, it feels like it unlocks and I can spin the threaded rod by hand. It will not move on its own when I try to move the z.

I haven’t tried switching the plugs into the control board. Would that be next step? Anyone have any thoughts or recommendations?

7

Yes, switch plugs and prove the fault into the board or motor. If the motor spins in the other port it is the board. A bunch of boards seem to have the problem.

8

After a reflow, Z motor don’t move.

Before reflow, I’ve seen an error on wifi interface:
Z2 expect return 0x21 but send 0x00.
This error show a problem with driver.
Driver TMC2209 is dead.

So, I have only one solution: replace card board.

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9

I’m sorry that code must have expired, I will DM you an updated one right now

10

Thank you Bar,
But I’ve already made my order two days ago ( #11506) without free shipping code.
And it was already sent…

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11

I’ll refund the shipping on that right now!

12

Thanks, Bar
I can’t wait to get it ready to get the machine up and running.

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13

Yeah going to try that. I also just ordered a spare board in case the board is the issue. Hoping to have more answers by this afternoon.