Hi all

This has been kicked around and and I have seen various answers but..
I am currently running a 10k pot setup as per http://www.woodworkforums.com/attach.../190119.attach

I can vary between 16k RPM and 24k RPM but no lower than 16k. Can someone explain the math on this as far as using the pot as a voltage divider and getting speeds down to say 8k or 9k?

Would simply changing to a 20kOhm pot do the trick ?

Thanks

David