Use PWM instead of Potentiometer VFD

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12 Jan 2021 20:30 #195115 by Anonymous
I have a VFD which controlls the spindle motor on my lathe.
It is currently hooked up to a Potentiometer to be controlled by hand but i want to controll it with a PWM signal.
Can i just hook up the PWM signal to the VFD instead of the potentiometer? Or will that not work?

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12 Jan 2021 21:25 #195124 by andypugh
It depends on the VFD, but probably.

What is generating the PWM?

Here is a simple circuit than can be used to make a PWM look like a potentiometer to the VFD:

photos.app.goo.gl/cFtC9m7CeLSKASAa7

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13 Jan 2021 00:19 #195157 by Benb
An other alternative is to purchase ready made board they cost about $6:
opencircuit.shop/Product/PWM-to-Analog-0-10V-Converter-Module
www.aliexpress.com/i/32844261017.html
Ifyou google analog 0-10v to pwd converter you will probably find a supplier in your area.

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