# \#c100

**URL:** https://forum.avidcnc.com/tag/c100/73.md

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## [Unlocking old C100 vfd](https://forum.avidcnc.com/t/unlocking-old-c100-vfd/3141)

<div class="topic-metadata">

**Author:** [@pludikar](https://forum.avidcnc.com/u/pludikar)\
**Replies:** 5\
**Last updated:** [April 14, 2024, 12:46pm UTC](https://forum.avidcnc.com/t/unlocking-old-c100-vfd/3141 "2024-04-14T12:46:09Z")

</div>

Hi, I have a CNCRP 4896 (Jan 2016) which has a GMT 2.2kW spindle and an LSElectric C100 VFD. My son bought me a rapidchange ATC magazine which requires the spindle speed to drop to 1000rpm. Easy to change I thought - …