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?
Foot switch for Dremel?
- Thread starter Henpecked1
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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
John
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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!
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
http://www.ebay.co.uk/itm/SCR-Hi-po...ng-Speed-Control-Thermost-3KW-E-/291639371151