# Only one Z axis motor is working

**URL:** https://forums.maslowcnc.com/t/only-one-z-axis-motor-is-working/24336
**Category:** Troubleshooting
**Created:** [June 10, 2025, 4:56pm UTC](https://forums.maslowcnc.com/t/only-one-z-axis-motor-is-working/24336 "2025-06-10T16:56:48Z")
**Posts on this page:** 1
**Showing post:** 5

<div class="post-metadata">

### Author: ![AzaB2C](https://yyz1.discourse-cdn.com/flex031/user_avatar/forums.maslowcnc.com/azab2c/32/22286_2.png) [@AzaB2C](https://forums.maslowcnc.com/u/AzaB2C)
#### Post date: [June 23, 2025, 2:41pm UTC](https://forums.maslowcnc.com/t/only-one-z-axis-motor-is-working/24336/5 "2025-06-23T14:41:56Z")

</div>

> [@bar](#):
>
> common issue with this batch of boards

Curious if root cause is understood? posted info/questions that may be related at

> [@What can we improve in the hardware?](https://forums.maslowcnc.com/t/what-can-we-improve-in-the-hardware/22430/157):
>
> Are the TMC2209 ENN Pins unconnected and floating? If so, is that intentional because enable/disable happens via UART? Am wondering if this could be causing some boards to have one or both Z stepper motors unexpectedly/randomly not work. Am wondering if people with “bad boards” (that they would normally just trash) and unreliable Z axis behavior, but also have brilliant eyesight, dexterity and a fine tipped soldering iron… might see better behavior if they solder blob the TMC2209 ENN and GND…

**Edit:**. Saw some posts about a batch of boards not being soldered/reflowed correctly. Saw some people having success fixing by reflowing or hot air gun. But am still curious about ENN pin mentioned in above post.

---

_[View the full topic](https://forums.maslowcnc.com/t/only-one-z-axis-motor-is-working/24336)._