RE: [CAD_CAM_EDM_DRO] 3 Phase power

A number of links for phase converters on the resources/links page on the
FAQ.

Tim
[Denver, CO]

>
> Armilite@... wrote:
>
> > Hello:
> > Does anyone know someone who sells, a replacement one phase 220v, or
> better
> > yet a 110v motor to replace the 3 phase 220v
> > Lima Electric Motor on my Powermatic variable speed, model
> 1150 drill
> press i
> > just bought at the ISU sale, the motor Serail Number
> > is R73476JB, model 4A, 3/4 HP, Type RV, Frame 72, 1200 RPM.
> The motor is
> > good, I just don't have 3 phase 220v in my garage.
> > Thanks for any help you can give.
>
> In this case, where you only have one machine that requires 3
> phase, and a
> 3/4 hp motor at that, I would recommend that you simply make
> the drill press
> motor itself into a rotary phase convertor. What I mean by
> this, is that by
> adding a run capacitor to the 3rd leg of the motor, and
> hooking the other
> two up to 220V single phase, you will be able to start and
> run the drill
> press fine. In fact, you will get nearly all of the original
> 3/4 hp out of
> the motor.
> Look for the plans for a rotary (or even static) phase
> convertor on
> the web. The dropbox for the news group
> rec.crafts.metalworking has good
> plans on rotary phase convertors. What you will be doing, is
> essentially
> making the drill presses own motor into a rotary convertor,
> and using it as
> is, not hooking it up to another motor. Or, more simply put,
> generating the
> 3rd leg for the motor with the capacitor. Some would call
> this a static
> convertor. This will likely allow it to start and run off
> the original
> switch.
> In all, you should be able to get the drill press going fine for
> less than $30 US, and maybe even for free, if you can get a
> suitable run
> capacitor. In my opinion, every home shop'er should at least
> understand a
> bit about 3 phase, because so many industrial castoffs can be
> had cheaply
> with three phase motors. The motors are dead simple, only bearings,
> armature, and field coil.
> While a VFD is going to give speed control, and allow you to use
> single phase power, is will be a more costly solution to get one motor
> running.
>
> Brad
>
> FAQ: http://www.ktmarketing.com/faq.html