# MK2.5 Closed Loop Motors

**URL:** <https://forum.sienci.com/t/mk2-5-closed-loop-motors/26173>\
**Category:** 📛 Others\
**Created:** [April 15, 2026, 12:18am UTC](https://forum.sienci.com/t/mk2-5-closed-loop-motors/26173 "2026-04-15T00:18:11Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Bobi111956](https://forum.sienci.com/letter_avatar_proxy/v4/letter/b/a9adbd/32.png) [@Bobi111956](https://forum.sienci.com/u/Bobi111956)\
**Post date:** [April 15, 2026, 12:18am UTC](https://forum.sienci.com/t/mk2-5-closed-loop-motors/26173/1 "2026-04-15T00:18:12Z")

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Couple of quick questions here as I just did this upgrade:

Do I leave VFD on all the time ?

Do I still need to keep z motor energized to avoid spindle movement when not using ? I also recently installed the 1.5 Kw spindle.

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**Author:** ![\_Michael](https://forum.sienci.com/user_avatar/forum.sienci.com/_michael/32/2962_2.png) [@\_Michael](https://forum.sienci.com/u/_Michael)\
**Post date:** [April 15, 2026, 12:51am UTC](https://forum.sienci.com/t/mk2-5-closed-loop-motors/26173/2 "2026-04-15T00:51:15Z")

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@Bobi111956 Welcome to the party!

> [@Bobi111956](#):
>
> Do I still need to keep z motor energized to avoid spindle movement when not using ?

Do you that because your in the middle of job? I added the inductive sensors to my Mk1 and I always shut everything down and I set up gSender to lock the machine until I home at startup. The XYZ zeros are saved in the EEPROM so no need to reset those. It’s always been very accurate, at least for woodworking. I figure it saves power and wear on the motors and electronics if I shut them down. Your milleage may vary. 😃

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**Author:** ![Bobi111956](https://forum.sienci.com/letter_avatar_proxy/v4/letter/b/a9adbd/32.png) [@Bobi111956](https://forum.sienci.com/u/Bobi111956)\
**Post date:** [April 15, 2026, 1:28pm UTC](https://forum.sienci.com/t/mk2-5-closed-loop-motors/26173/3 "2026-04-15T13:28:12Z")

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Thanks much Michael ! Just didn’t want weight of spindle to allow it to slide down, due to weight and drive last tool used into board. Was a warning when I bought spindle that was in the instructions due to weight

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**Author:** ![\_Michael](https://forum.sienci.com/user_avatar/forum.sienci.com/_michael/32/2962_2.png) [@\_Michael](https://forum.sienci.com/u/_Michael)\
**Post date:** [April 15, 2026, 6:46pm UTC](https://forum.sienci.com/t/mk2-5-closed-loop-motors/26173/4 "2026-04-15T18:46:37Z")

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I see, Sienci doesn’t recommend putting a spindle on the Mk1 because it’s not as rigid so I didn’t know they recommended that. Just a thought but could you make some kind of stand that you could place in such a way that when the Z slides down the spindle mount would land on it and prevent the bit from touching the spoil board?