# Need set max\_velocity low or hight for speed up?

**URL:** <https://klipper.discourse.group/t/need-set-max-velocity-low-or-hight-for-speed-up/1874>\
**Category:** General Discussion\
**Created:** [January 24, 2022, 11:08am UTC](https://klipper.discourse.group/t/need-set-max-velocity-low-or-hight-for-speed-up/1874 "2022-01-24T11:08:34Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![witawat57](https://avatars.discourse-cdn.com/v4/letter/w/7feea3/32.png) [@witawat57](https://klipper.discourse.group/u/witawat57)\
**Post date:** [January 24, 2022, 11:08am UTC](https://klipper.discourse.group/t/need-set-max-velocity-low-or-hight-for-speed-up/1874/1 "2022-01-24T11:08:34Z")

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hello

about max\_velocity  
need set max\_velocity low or hight for speed up ?

i try

[printer]  
kinematics: cartesian  
max\_velocity: 1000  
max\_accel: 4000

and print 120mm/s  
look like slow speed

but set  
[printer]  
kinematics: cartesian  
max\_velocity: 300  
max\_accel: 4000

look like fast speed

what max\_velocity can set value ?

thakyou

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**Author:** ![Sineos](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/sineos/32/18_2.png) [@Sineos](https://klipper.discourse.group/u/Sineos)\
**Post date:** [January 24, 2022, 12:23pm UTC](https://klipper.discourse.group/t/need-set-max-velocity-low-or-hight-for-speed-up/1874/2 "2022-01-24T12:23:04Z")

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`max_velocity` in mm/s is the maximum speed Klipper allows the print-head to move. The higher the faster  
`max_accel` in mm/s^2 is the maximum acceleration Klipper allows the print-head to move. The higher the faster.

The actual speed is determined by your slicer settings up to the above maxima.

Typically higher acceleration has a bigger impact than only the velocity setting. What can be achieved mainly depends on your printer’s mechanical capabilities and also the speed of your board / stepper settings

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<div class="post-metadata">

**Author:** ![witawat57](https://avatars.discourse-cdn.com/v4/letter/w/7feea3/32.png) [@witawat57](https://klipper.discourse.group/u/witawat57)\
**Post date:** [January 24, 2022, 1:21pm UTC](https://klipper.discourse.group/t/need-set-max-velocity-low-or-hight-for-speed-up/1874/3 "2022-01-24T13:21:53Z")

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you can recommend max\_velocity = 1000 or 300 ?

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<div class="post-metadata">

**Author:** ![Sineos](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/sineos/32/18_2.png) [@Sineos](https://klipper.discourse.group/u/Sineos)\
**Post date:** [January 24, 2022, 2:24pm UTC](https://klipper.discourse.group/t/need-set-max-velocity-low-or-hight-for-speed-up/1874/4 "2022-01-24T14:24:30Z")

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> [@Sineos](#):
>
> What can be achieved mainly depends on your printer’s mechanical capabilities and also the speed of your board / stepper settings

I do not know your printer or its capabilities. Therefore I cannot give you any reccomendation