# Closed Loop Stepper Motors speeds

**URL:** <https://forum.sienci.com/t/closed-loop-stepper-motors-speeds/25392>\
**Category:** 📛 Others\
**Created:** [January 9, 2026, 7:50pm UTC](https://forum.sienci.com/t/closed-loop-stepper-motors-speeds/25392 "2026-01-09T19:50:25Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![SeanH](https://forum.sienci.com/letter_avatar_proxy/v4/letter/s/4af34b/32.png) [@SeanH](https://forum.sienci.com/u/SeanH)\
**Post date:** [January 9, 2026, 7:50pm UTC](https://forum.sienci.com/t/closed-loop-stepper-motors-speeds/25392/1 "2026-01-09T19:50:26Z")

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What is the max speed I can move on the x and y axis if I installed the new closed loop stepper motors on my Longmill MK2.

I have already installed the SLB and a spindle, but I feel limited by the x and Y axis speeds being limited to about 150 in/min

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**Author:** ![KGN](https://forum.sienci.com/letter_avatar_proxy/v4/letter/k/c77e96/32.png) [@KGN](https://forum.sienci.com/u/KGN)\
**Post date:** [January 9, 2026, 7:58pm UTC](https://forum.sienci.com/t/closed-loop-stepper-motors-speeds/25392/2 "2026-01-09T19:58:05Z")

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The macro that ships with the CLSM kit which updates EEPROM sets the new max travel speeds to 7000mm/min (275in/min) for X and Y and 2000mm/min (78in/min) for Z, which are the recommended new defaults.

See resources:

> **[Closed Loop Upgrade - LongMill MK2 CNC](https://resources.sienci.com/view/lmk2-closed-loop-steppers-2/#software-changes)**
>
> Switching to the Closed Loop Stepper Motors (CLSM) from the open loop motors is easy. The main difference between the open loop and the closed loop motors is that the open loop motors lack positional feedback making them prone to “skipping steps”...