# Z motor issue - intermittent
**URL:** https://forums.maslowcnc.com/t/z-motor-issue-intermittent/25073
**Category:** Troubleshooting
**Created:** [October 19, 2025, 4:45am UTC](https://forums.maslowcnc.com/t/z-motor-issue-intermittent/25073 "2025-10-19T04:45:13Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@TimS](https://forums.maslowcnc.com/u/TimS)
#### Post date: [October 19, 2025, 4:45am UTC](https://forums.maslowcnc.com/t/z-motor-issue-intermittent/25073/1 "2025-10-19T04:45:13Z")
Trying to get the M4 going in our woodshop.
I connected to the maslow wifi. It works but there is no blinking blue light on the board. Board v1.10b, firmware 1.12. The belts retract and extend great. One z-axis motor works intermittently when lowering and raising, it stops prematurely. I swapped connections on the board and the same z-axis motor was still doing the same thing. I loosened both z motor attach screws thinking it may not be aligned properly, but it still happens. I can rotate both motors by hand, but the bad motor is quite a bit more difficult. Do we have a bad motor?
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### Author:  [@TimS](https://forums.maslowcnc.com/u/TimS)
#### Post date: [October 19, 2025, 11:09pm UTC](https://forums.maslowcnc.com/t/z-motor-issue-intermittent/25073/2 "2025-10-19T23:09:25Z")
I did a little bit more troubleshooting today. I loosened the screws that held in the brass nut for the bad motor. Loosening it up seemed to help. The motors now run at the same speed and equally move the spindle up and down. Has anyone else had this issue?
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### Author:  [@bar](https://forums.maslowcnc.com/u/bar)
#### Post date: [October 20, 2025, 8:32pm UTC](https://forums.maslowcnc.com/t/z-motor-issue-intermittent/25073/3 "2025-10-20T20:32:09Z")
> [@TimS](#):
>
> the brass nut
Where did you get a brass nut? I did some testing with those and found them to bind up a lot so we only ever shipped the plastic ones
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### Author:  [@TimS](https://forums.maslowcnc.com/u/TimS)
#### Post date: [October 20, 2025, 9:14pm UTC](https://forums.maslowcnc.com/t/z-motor-issue-intermittent/25073/4 "2025-10-20T21:14:52Z")
I think it shipped from China like that.
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### Author:  [@bar](https://forums.maslowcnc.com/u/bar)
#### Post date: [October 20, 2025, 10:55pm UTC](https://forums.maslowcnc.com/t/z-motor-issue-intermittent/25073/5 "2025-10-20T22:55:18Z")
We’re talking about these, but brass, right?
> **[Delrin Leadscrew Nuts](https://shop.maslowcnc.com/products/delrin-leadscrew-nut?_pos=1&_sid=be6612fb3&_ss=r)**
>
> These typically come installed on the stepper motors, but are available here is a replacement part. This is a pack of 2pcs.
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### Author:  [@TimS](https://forums.maslowcnc.com/u/TimS)
#### Post date: [October 21, 2025, 3:21am UTC](https://forums.maslowcnc.com/t/z-motor-issue-intermittent/25073/6 "2025-10-21T03:21:26Z")
I stand corrected. They are the black ones. No idea why I was thinking brass, maybe from the assembly video.
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### Author:  [@niccokunzmann](https://forums.maslowcnc.com/u/niccokunzmann)
#### Post date: [October 25, 2025, 9:49pm UTC](https://forums.maslowcnc.com/t/z-motor-issue-intermittent/25073/7 "2025-10-25T21:49:44Z")
For me, there is an issue that one of the z-axis stepper motors is hard to turn. Here is what was suggested:
> [@Only one z axis motor port is working (new build)](https://forums.maslowcnc.com/t/only-one-z-axis-motor-port-is-working-new-build/25103/2):
>
> Raise the Router until it off the Z motor screws to ensure it not jamming one side. you can wind them up manually if required. First prove the fault into the control board or not by swapping the Z connections. If the fault follows the port it is likely a faulty control board. Which you have done, so you will probably need a new board. Some people have had some success resoldering the board, but not everyone. If both ports work with no load then it could be an alignment problem, either where th…
I will check tomorrow probably.