RE: [CAD_CAM_EDM_DRO] Re: Is it possible to change the BP motor to eliminate shifting?

Maybe this is heresy, but how about a small stepper or servo motor
controlling the Varispeed crank. It's kinda hokey, but no fancy spindle
electronics involved and you get maximum torque at the low end. Also, you
don't have to change a whole lot of your setup to get there.

Just a thought,
jeff


-----Original Message-----
From: Keith Clark [mailto:mail@...]
Sent: Sunday, April 10, 2005 11:14 AM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Re: Is it possible to change the BP motor to
eliminate shifting?



I was wondering if there some more powerful motor or other way to
gear it to maintain the torque in the low range?

Thanks
Keith


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Lance Hopper"
<snaggletto@c...> wrote:

>
> Yes, you can use a VFD, to control the speed of the motor.

However,

> you will lose tons of torque (cutting power) at lower RPM's by not
> using the backgear (low gear range). This would render the

Bridgeport

> nearly useless while using larger diameter cutters at low RPM.
>
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "Keith Clark" <mail@t...>

wrote:

> >
> > Is it possible to change the 2 HP motor on my (Series 1

originally

> > Boss controlled) Bridgeport spindle during conversion to control
> > spindle speed, to a motor that could have the entire speed range
> > needed and thus obviate the need for the gear shift?
> >
> > Thanks,
> > Keith

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