# Spindle Speed Doubled

**URL:** <https://forum.pwncnc.com/t/spindle-speed-doubled/2948>\
**Category:** Dominator CNC\
**Tags:** conversion-kit\
**Created:** [April 3, 2025, 10:55pm UTC](https://forum.pwncnc.com/t/spindle-speed-doubled/2948 "2025-04-03T22:55:16Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![peschkaj](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.pwncnc.com/peschkaj/32/620_2.png) [@peschkaj](https://forum.pwncnc.com/u/peschkaj)\
**Post date:** [April 3, 2025, 10:55pm UTC](https://forum.pwncnc.com/t/spindle-speed-doubled/2948/1 "2025-04-03T22:55:16Z")

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I’m running [a spindle warm up program](https://support.pwncnc.com/kb/article/291-spindle-warm-up/) on a newly assembled conversion kit. I’m seeing spindle speeds that are always double the requested `S1234`. Is there something to correct/check on the Masso or VFD?

Additional troubleshooting steps:

I set the spindle speed to 7000RPM and started the spindle going clockwise. I then checked on the VFD and it’s showing 226.5Hz and around 13600 RPM.

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**Author:** ![Chris](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.pwncnc.com/chris/32/54_2.png) [@Chris](https://forum.pwncnc.com/u/Chris)\
**Post date:** [April 3, 2025, 11:20pm UTC](https://forum.pwncnc.com/t/spindle-speed-doubled/2948/2 "2025-04-03T23:20:47Z")

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Change p2.0.15 on the vfd to 10.

Masso uses a 10v signal, shapeoko uses a 5v signal

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<div class="post-metadata">

**Author:** ![peschkaj](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.pwncnc.com/peschkaj/32/620_2.png) [@peschkaj](https://forum.pwncnc.com/u/peschkaj)\
**Post date:** [April 3, 2025, 11:45pm UTC](https://forum.pwncnc.com/t/spindle-speed-doubled/2948/3 "2025-04-03T23:45:33Z")

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That did it, thank you.