Re: [ATM] Re: Linking motors to shafts

["Ron Gafron" <rgafron@comcast.net>]

Thanks to all that were kind enough to respond.  I'll check out all of your 
suggestions, and hopefully, report back on my progress.

Ron
----- Original Message ----- 
From: "David Cohen" <davelcohen2000@yahoo.com>
To: <rgafron@comcast.net>
Cc: <atm@atmlist.net>
Sent: Friday, October 29, 2004 12:34 PM
Subject: [ATM] Re: Linking motors to shafts


> Look for Lovejoy couplings in McMaster Carr or MSC
> (www.mscdirect.com). They are called "shaft
> couplings". They are 3-piece couplings.  You need to
> get a coupling for the motor shaft and a coupling for
> the driven shaft.  They each can be different bore
> sizes, in accordance with your needs.  They have keyed
> and setscrew versions.  I use the 2-setscrew couplings
> - they will work on a  shaft with/without flats, or a
> threaded rod. You also need a spider, with is a soft
> rubberlike material that allows for some misalignment.
> I used mine with a NEMA 34 stepper motor to turn an
> observatory dome - the couping cost less than ten
> dollars.
>
> Bear in mind that the spider will allow an initial
> twist to occur between the two shafts, the amount of
> twist increasing with torque.  That may be a down side
> if you're driving a R.A. axis.  The up side is that
> the spider does help reduce vibration somewhat - an
> unpleasant characteristic that is inherent with
> stepper motors. They also make rigid couplings where
> no relative motion occurs, which requires very good
> shaft alignment.
>
> Try this URL, it should get you started
>
> http://www1.mscdirect.com/CGI/NNDRVSH
>
> I hope this helps.
>
>
> =====
> Best Regards,
> Dave Cohen
> davelcohen2000@yahoo.com
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam?  Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com
> 


_______________________________________________
ATM mailing list http://www.atmlist.net/