Drill Doctor selectable 110/220 Volts ?

[TR]

Does a typical drill doctor come with selectable voltage ?
Thinking of buying one from the USA and bringing to Australia.

[PeteF]

I bought a 750X from Enco and simply use it through a step-down transformer. I have a number of 115V tools and appliances, so the transformer gets used literally every time I'm in the workshop, however even if you bought one just for the Drill Doctor I think you'd still be way ahead. Have a look for some at Jaycar and select one that's just a bit larger than your expected future needs.

Pete

[bob ward]

There are any number of 240V to 110V transformers on ebay. They only transform the voltage of course, so you will be getting 110V 50Hz out rather than the US 110V 60Hz

Can the electrical gurus tell me what effects there are if any on the type of electric motor in a DD when the frequency is dropped from 60Hz to 50Hz?

http://shop.ebay.com.au/?_from=R40&_...All-Categories

[TR]

Bob and Peter thanks very much. 60hz to 50hz I think just means the drill doctor would run a bit slower.

[MaxHeadRoom]

I looked at trying to determine the type of motor in it, and I see by one site that lists the specs, is that it is a permanent magnet motor, which might imply that it has a rpm controller in it, for a motor that is either DC or AC electronically controlled, if so the supply frequency may not be relevant?
Max.

[PeteF]

I believe it is a universal motor in the DD, so frequency isn't an issue. As mentioned I'm using one myself through a stepdown transformer and it works just fine.

Pete

[MaxHeadRoom]

Here is the link mentioning PM motor, if it is, then it is not a universal.
http://www.drilldoctor.com/index.php...mart&Itemid=90
Max.

[bob ward]

Guys, I know little about electric motor types so bear with me, but isn't a permanent magnet motor a DC device?

If so, presumably the DD750X has an AC/DC rectifier, which will cope with either 50Hz or 60Hz input?

All that matters is that the input voltage is correct?

PeteF sent you a PM. EDIT. Apparently I haven't, your mailbox is full. r-j-wardATbigpond.com

[MaxHeadRoom]

Guys, I know little about electric motor types so bear with me, but isn't a permanent magnet motor a DC device?

Not necessarily, if AC, the rotor is P.M. and the stator is usually 3 windings for 3 ph synchronous AC or a BLDC type motor.
A DC motor has a P.M. stator and a wound rotor.
BTW, here is a link for BLDC.
http://users.tinyworld.co.uk/flecc/4...otor031102.swf
In any event, it is likely that the mains freq. will not be an issue?
Max.

[PeteF]

Emptied my inbox now, sorry about that.

I doubt I'll bother pulling mine apart to determine precisely what type of motor is used, the important thing as far as the OP is concerned is that the machine will work well simply by feeing through an inexpensive stepdown transformer.

Pete