Re: Bridgeport servo motors

Surplus Center just e-mailed me letting me know that they pulled the
box off of the UPS truck...so looks like I called them just in time!

Yeah, the 10-1723 looks like it may be my only choice right now
(affordably speaking)...I believe that I can fit 2.5:1 inside the
cover. I will have to make a 45° bracket that moves the motor off to
the right so that it clears the knee & I will have to redsign the
belt cover. I really didn't want to do that...but it sure beats
having a 14" log sticking out of the front ~ I think you read my
comments on that.

No offense taken....everything happens for a reason I suppose. Thanks
for the input.

-Brady

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "cnc_4_me" <cnc4me@g...>
wrote:

>
> To tell you the truth I am glad for you. I thought the motor you
> picked was a terrible choice. It has a large diameter giving it

high

> rotational inertia (poor for control, long response time.). That's
> why servos are long and thin. And you were going to run it 1-1,
> probably the worst choice you can make. DC motors do not run
> smoothly at low speeds. So with high rotor inertia and 1-1 belting

I

> think this would have been a disaster.
>
> Not trying to insult you, just trying to help.
>
> Wally
>
> P.S.
>
> What you may want to look at is surplus center 10-1723 motor. It

has

> the right servo shape, good torque, and the shaft you

want...assuming

> no mistake on reverability.
>
> at 111vdc it has 483 0z-in or 30 lb-in torque. I think you said

you

> were going to run the rutex drives so all this torque would be
> available.
>
> Running this motor 3-1 would give you more torque than you could
> shake a stick at and 200 IPM rapids. Assuming you have the room

for

> 3-1, you may only easly fit 2-1 if i am understanding your machine
> correctly.
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "braidmeister"
> <braidmeister@y...> wrote:
> >
> > Scott,
> > Unfortunately...It is correct...they ARE CCW...#$^%^(*()&$!!!!
> >
> > I just called them and the tech opened up the motor and looked at
> the
> > brushes. He said that it did sound different running it forwards

or

> > backwards...BUT the brushes were angled...and there is no easy

way

> to
> > get them timed for both directs.
> >
> > WHAT A HUGE DISAPPOINTMENT!!!
> >
> > So now...back to freakin' square 1. I would be interested in

other

> > types of motors than these or the Ameteks (too slow). Anybody got

a

> > source for 3 that will work at a decent price? (Decent meaning
> better
> > than $400 ea)
> >
> > SO here's a question for you people: Since Surplus Center
> advertised
> > the motors as bi-directional, who pays for the shipping up and
> back?
> > Why should I have to pay shipping on something that was falsely
> > advertised?
> >
> > -Brady
> >