Foot switch for Dremel?

I have been given a 5 speed Dremel, 125watt. I want to control it using a foot switch. Can I use a variable speed foot switch (if I put it on max speed setting) or can I only use an on-off foot switch please?

Just a speculation, but I would think if you reduced the revolutions of your Dremel by using a resistive foot switch you'd be left with very little power to do the job.....better just have an off/on one I'd guess.
John

I'm not so sure about that, ISTR that Dremels etc. are speed controlled by the voltage applied to them. (or is it PWM?)

However see https://www.dremel.com/en-us/custom...?prod=MultiPro Single and Two Speed Tools#205

Me, I'd be looking at getting the foot switch control the PSU to vary the voltage supplied to it, not from 0v-max but from enough to provide a slow speed without knackering the drill.
If you look atthe variable speed dremels, they appear to have a potentiometer on the front panel - get the foot switch to replace this and it may work.
Would need some electronics though - and very dependent upon your drill model.

One thing though, absolutely do not attempt at varying the mains input!

Ok, thanks for your help. More complicated than I thought! Maybe I'll go to plan B and save up for a new drill!

Drill speed controllers use a THYRISTOR or a TRIAC. It used to be possible to buy these as ready-made external accessories.
http://www.ebay.co.uk/itm/SCR-Hi-po...ng-Speed-Control-Thermost-3KW-E-/291639371151