Re: [CAD_CAM_EDM_DRO] Re: Shopbot, Rack and Pinion, Ball Screw, Acme precision screw?

If you get over to the Shopbot store, give me a shout, I'm only about 20
miles from there, and have a homebuilt machine you can look at. Also got
some parts you may be interested in if you decide to build your own.

Bill

----- Original Message -----
From: "dataceph" <logical@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Friday, April 25, 2003 7:45 PM
Subject: [CAD_CAM_EDM_DRO] Re: Shopbot, Rack and Pinion, Ball Screw, Acme
precision screw?


> Here's the url for oriental motors: www.orientalmotor.co.jp
> They have the specs on the drives and the gears. I found out that
> the one that the Shopbot uses the PN 7.2 reduction gear ratio and
> the rack and pinions are Boston Gear pinions (20pitch;14.5deg
> pressure angle).
>
> I am finding out a bunch from the folks here and I am grateful. I am
> pricing building a machine from very good parts, i.e. ball screws, to
> not so good, rack and pinion. I think I will stick with stepper
> motors though. I have read that the NEMA 42 and under are better
> values for the money than servos. Over NEMA 42, go with servos.
>
> > >Hi Wes,
> > >
> > >I'd watch the surplus and ebay channels for Oriental Motors (Vexta)
> > >stepper/gearhead motors. I recall seeing ShopBot pix, and the
> > >motors/gearheads looked like ones I've picked up. PH266 motors,
> > >2GK7.5KA gearheads. Makes me want to build a router if I can use
> my
> > >parts!
> >
> > I've looked for the specs on the gearheads. I've got several
> > PH66-01GK Vexta steppers with 2GK18KA gearheads. I've managed to
> > crossreference the motors, and found the specs on the motors (I
> > think), but the gearheads remain unavailable, spec wise...
> >
> > Any pointers?
> >
> > I'm thinking of driving the fine feed on a Grizzly Mini-mill with
> one,
> > I've got a Z axis DRO, so I'm less worried about backlash than
> > otherwise.
> >
> > Harvey
> >
> >
> > >
> > >Alan KM6VV
>
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html
> FILES: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO/files/
> Post Messages: CAD_CAM_EDM_DRO@yahoogroups.com
>
> Subscribe: CAD_CAM_EDM_DRO-subscribe@yahoogroups.com
> Unsubscribe: CAD_CAM_EDM_DRO-unsubscribe@yahoogroups.com
> List owner: CAD_CAM_EDM_DRO-owner@yahoogroups.com, wanliker@...,
timg@...
> Moderator: pentam@... indigo_red@... [Moderators]
> URL to this group: http://groups.yahoo.com/group/CAD_CAM_EDM_DRO
>
> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto:
aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if
you have trouble.
> http://www.metalworking.com/news_servers.html
>
> http://groups.yahoo.com/group/jobshophomeshop I consider this to be a
sister site to the CCED group, as many of the same members are there, for OT
subjects, that are not allowed on the CCED list.
>
> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
> bill
> List Mom
> List Owner
>
>
>
> Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
>
>