# Spindle electronics clarification

**URL:** <https://community.inventables.com/t/spindle-electronics-clarification/19107>\
**Category:** Assembly\
**Created:** [January 22, 2016, 6:21am UTC](https://community.inventables.com/t/spindle-electronics-clarification/19107 "2016-01-22T06:21:28Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![MatSchwartz](https://avatars.discourse-cdn.com/v4/letter/m/f08c70/32.png) [@MatSchwartz](https://community.inventables.com/u/MatSchwartz)\
**Post date:** [January 22, 2016, 6:21am UTC](https://community.inventables.com/t/spindle-electronics-clarification/19107/1 "2016-01-22T06:21:28Z")

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I have the 48vdc quiet cut spindle from the kit [Quiet Cut Spindle Upgrade & TinyG | Inventables](https://www.inventables.com/projects/quiet-cut-spindle-upgrade-tinyg) . While going through the assembly instructions on the main page, I am confused if nothing goes into the PWM/GND pins or Spindle +/-.

At the top, the video shows red/black wires going into spindle +/- . Do I not do this part for the 48vdc?

Step 13 “Connect PWM Spindle Control” has yellow/black wires go from the 8 pin female header to the two pin PWM/GND. In the spindle upgrade, it just shows the 8 pin header. Is this step the same?

I guess in essence, is the only difference instead of following the video of the Spindle+/- going into the board, it goes into the Speed Controller, (and the 48vdc power supply also goes into it), and the jumper is switched?

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**Author:** ![LarryM](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/larrym/32/51450_2.png) [@LarryM](https://community.inventables.com/u/LarryM)\
**Post date:** [January 22, 2016, 1:24pm UTC](https://community.inventables.com/t/spindle-electronics-clarification/19107/2 "2016-01-22T13:24:29Z")

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Check out this web page:  
[http://blog.inventables.com/2014/06/shapeoko-upgrade-quite-cut-spindle-with.html](http://blog.inventables.com/2014/06/shapeoko-upgrade-quite-cut-spindle-with.html)

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<div class="post-metadata">

**Author:** ![MatSchwartz](https://avatars.discourse-cdn.com/v4/letter/m/f08c70/32.png) [@MatSchwartz](https://community.inventables.com/u/MatSchwartz)\
**Post date:** [February 17, 2016, 1:20am UTC](https://community.inventables.com/t/spindle-electronics-clarification/19107/3 "2016-02-17T01:20:33Z")

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I followed this page, but the spindle speed is only being controlled by the potentiometer, it doesnt work when i use easel for turning on/off the spindle. It doesnt show anything plugged into the Spindle Logic/Gnd, and shows a different jumper configuration than the link I was following with the TinyG.

Could someone explain what I am doing wrong?