<p>Check if your Z-Rods and motors are exactly vertical. If not, adjust as needed.</p>

<p>Check if the brass nuts are perfectly aligned with the rods in the position they are forced in by the screws. Shim to adjust if needed.</p>

<p>If they are ok, then your brass nuts might need a little oiling/grease if they stick to the lead screw.</p>

CC BY-SA 4.0
2018-12-21T14:16:09.990Z
2018-12-22T10:12:51.267Z
2018-12-22T10:12:51.267Z
Trish
<p>I've got a Geeetech Pro B i3 printer (my first 3d printer) and after I've assembled it I started testing the axis. X and Y work well but Z cannot move.</p>

<p>If I disconnect the couplings the motors move by themselves and they move in the same direction.</p>

<p><a href="https://i.sstatic.net/K8vDl.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/K8vDl.jpg" alt="enter image description here"></a></p>

<p>If I help a little bit the motors, by turning with my hand, they move and sometimes move without helping anymore but it stops after a few seconds.</p>

<p>I don't know what do to. I've measured the rest of the setup to make sure there aren't any big differences that could create tension.</p>

<p>What do you suggest?</p>

<prusa-i3><z-axis><geeetech>
Z Axis Cannot Move
Daniel Luca CleanUnicorn
# Z Axis Cannot Move

(Asked by: username_0 on 2018-12-21)

I've got a Geeetech Pro B i3 printer (my first 3d printer) and after I've assembled it I started testing the axis. X and Y work well but Z cannot move.

If I disconnect the couplings the motors move by themselves and they move in the same direction.

[![enter image description here](https://i.sstatic.net/K8vDl.jpg)](https://i.sstatic.net/K8vDl.jpg)

If I help a little bit the motors, by turning with my hand, they move and sometimes move without helping anymore but it stops after a few seconds.

I don't know what do to. I've measured the rest of the setup to make sure there aren't any big differences that could create tension.

What do you suggest?

**Tags:** prusa-i3, z-axis, geeetech

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## 1 answers

### Answer by username_1 on 2018-12-21. Score: 2

Check if your Z-Rods and motors are exactly vertical. If not, adjust as needed.

Check if the brass nuts are perfectly aligned with the rods in the position they are forced in by the screws. Shim to adjust if needed.

If they are ok, then your brass nuts might need a little oiling/grease if they stick to the lead screw.


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