# Huanyang VFD - RPM is not reading correctly

**URL:** <https://forum.onefinitycnc.com/t/huanyang-vfd-rpm-is-not-reading-correctly/18115>\
**Category:** Spindle/VFD (Aftermarket/Unsupported)\
**Created:** [January 14, 2023, 2:01pm UTC](https://forum.onefinitycnc.com/t/huanyang-vfd-rpm-is-not-reading-correctly/18115 "2023-01-14T14:01:04Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![Atroz](https://avatars.discourse-cdn.com/v4/letter/a/958977/32.png) [@Atroz](https://forum.onefinitycnc.com/u/Atroz)\
**Post date:** [January 14, 2023, 2:12pm UTC](https://forum.onefinitycnc.com/t/huanyang-vfd-rpm-is-not-reading-correctly/18115/3 "2023-01-14T14:12:00Z")

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BTW, your can pick up a digital tachometer for about $20US that will help you confirm the actual speed vs what the VFD is telling you. Good for piece of mind.

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