<p><strong>This was a comment from the OP, which effectively answers their own question:</strong></p>

<p>After:</p>

<ul>
<li>Installing new Marlin 1.1.3;</li>
<li>Changing the Maximum Acceleration on Z down to 20, and; </li>
<li>Changing Acceleration and Retract Acceleration down to 1000.</li>
</ul>

<p>I have now a printout that measures 24.65 mm (0.65 mm higher than it should) and good enough for me to say, this is OK.</p>

CC BY-SA 4.0
2018-05-24T12:29:41.330Z
2018-05-24T12:29:41.330Z
Greenonline
<p>I have Anet A8 where I have changed the controller from the original to RAMPS 1.4 running Marlin 1.1.1 and ran into some strange issues with my Z axis.</p>

<p>Doing calibration (10&nbsp;mm cube, 10x10x20&nbsp;mm, 10x10x30&nbsp;mm) I am dead on the mm on the Z axis. (10&nbsp;mm, 20&nbsp;mm, 30&nbsp;mm)
But when I print a part that is supposed to be 24&nbsp;mm high, it comes out 27&nbsp;mm high.</p>

<p>Went back to print calibration 10x10x30, and Z axis is dead on 30&nbsp;mm again.</p>

<p>Also printed a bracket that was supposed to be 240&nbsp;mm high, ended up close to 270&nbsp;mm.</p>

<p>I am doing the same layer heights for all the prints (calibration cubes and otherwise). Starting with a 0.2&nbsp;mm first layer and then 0.1&nbsp;mm on all other layers. Using RepetierHost v. 1.6.2 with Slic3r v. 1.2.9</p>

<p>Anyone experienced something like this?</p>

CC BY-SA 3.0
2017-06-13T18:24:28.283Z
Are you using the same layer heights for all prints, or do you have a different height for the calibration cubes and for the other prints? Perhaps your Z axis is having trouble stepping accurately with a different layer height.
mbmcavoy
<calibration><z-axis>
Z axis OK during calibration, but WAY off on prints
litejk01
# Z axis OK during calibration, but WAY off on prints

(Asked by: username_0 on 2017-06-13)

I have Anet A8 where I have changed the controller from the original to RAMPS 1.4 running Marlin 1.1.1 and ran into some strange issues with my Z axis.

Doing calibration (10 mm cube, 10x10x20 mm, 10x10x30 mm) I am dead on the mm on the Z axis. (10 mm, 20 mm, 30 mm)
But when I print a part that is supposed to be 24 mm high, it comes out 27 mm high.

Went back to print calibration 10x10x30, and Z axis is dead on 30 mm again.

Also printed a bracket that was supposed to be 240 mm high, ended up close to 270 mm.

I am doing the same layer heights for all the prints (calibration cubes and otherwise). Starting with a 0.2 mm first layer and then 0.1 mm on all other layers. Using RepetierHost v. 1.6.2 with Slic3r v. 1.2.9

Anyone experienced something like this?

**Tags:** calibration, z-axis

> **Comments:**
> **username_1**: Are you using the same layer heights for all prints, or do you have a different height for the calibration cubes and for the other prints? Perhaps your Z axis is having trouble stepping accurately with a different layer height.  

---

## 1 answers

### Answer by username_2 on 2018-05-24. Score: 1

**This was a comment from the OP, which effectively answers their own question:**

After:

* Installing new Marlin 1.1.3;
* Changing the Maximum Acceleration on Z down to 20, and;
* Changing Acceleration and Retract Acceleration down to 1000.

I have now a printout that measures 24.65 mm (0.65 mm higher than it should) and good enough for me to say, this is OK.


---

