#  Limitation of the maximum XY speed by the max\_z\_velocity parameter

**URL:** <https://klipper.discourse.group/t/limitation-of-the-maximum-xy-speed-by-the-max-z-velocity-parameter/915>\
**Category:** General Discussion\
**Created:** [September 14, 2021, 4:03pm UTC](https://klipper.discourse.group/t/limitation-of-the-maximum-xy-speed-by-the-max-z-velocity-parameter/915 "2021-09-14T16:03:37Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![martinsevcikbrno](https://avatars.discourse-cdn.com/v4/letter/m/90ced4/32.png) [@martinsevcikbrno](https://klipper.discourse.group/u/martinsevcikbrno)\
**Post date:** [September 14, 2021, 4:03pm UTC](https://klipper.discourse.group/t/limitation-of-the-maximum-xy-speed-by-the-max-z-velocity-parameter/915/1 "2021-09-14T16:03:37Z")

</div>

If the max\_z\_velocity parameter is specified, the maximum movement speed is limited to this value even if max\_velocity is greater. For example [max\_z\_velocity: 50], [max\_velocity: 200] here the maximum movement speed is only 50 mm/sec.  
This is believed to be a bug, not a feature. If this is a bug, can you please fix it?

---

<div class="post-metadata">

**Author:** ![BK-Morpheus](https://avatars.discourse-cdn.com/v4/letter/b/ce73a5/32.png) [@BK-Morpheus](https://klipper.discourse.group/u/BK-Morpheus)\
**Post date:** [October 25, 2021, 12:33am UTC](https://klipper.discourse.group/t/limitation-of-the-maximum-xy-speed-by-the-max-z-velocity-parameter/915/2 "2021-10-25T00:33:01Z")

</div>

Just want to chime in on this topic, as I made that observation about half a year ago as well.  
The Klipper documentation says:

_max\_z\_velocity:_  
_# For delta printers this limits the maximum velocity (in mm/s) of_  
_# moves with z axis movement. This setting can be used to reduce the_  
_# maximum speed of up/down moves (which require a higher step rate_  
_# than other moves on a delta printer). The default is to use_  
_# max\_velocity for max\_z\_velocity._

But at the moment it’s definitely not only limiting “up/down moves”. It limits every move.  
Especially if you use low values like “50”, it’s noticeable right away, that all the delta moves (even travel moves) are limited to 50mm/s.

---

<div class="post-metadata">

**Author:** ![koconnor](https://avatars.discourse-cdn.com/v4/letter/k/aca169/32.png) [@koconnor](https://klipper.discourse.group/u/koconnor)\
**Post date:** [October 26, 2021, 10:12pm UTC](https://klipper.discourse.group/t/limitation-of-the-maximum-xy-speed-by-the-max-z-velocity-parameter/915/3 "2021-10-26T22:12:23Z")

</div>

There was a fix a couple of weeks ago for Delta printers (commit afd1058a). Make sure you are on the latest version of the code.

-Kevin

---

<div class="post-metadata">

**Author:** ![BK-Morpheus](https://avatars.discourse-cdn.com/v4/letter/b/ce73a5/32.png) [@BK-Morpheus](https://klipper.discourse.group/u/BK-Morpheus)\
**Post date:** [October 29, 2021, 3:18pm UTC](https://klipper.discourse.group/t/limitation-of-the-maximum-xy-speed-by-the-max-z-velocity-parameter/915/4 "2021-10-29T15:18:01Z")

</div>

Thanks Kevin. I haven’t updates for ~a month, so I’ll give it a try.