Path: utzoo!attcan!uunet!super!rminnich
From: rminnich@super.ORG (Ronald G Minnich)
Newsgroups: comp.sys.amiga
Subject: Re: Those seagates
Message-ID: <5144@super.ORG>
Date: 20 Jan 89 15:28:14 GMT
References: <8184@orstcs.CS.ORST.EDU> <13509@cup.portal.com> <14933@cisunx.UUCP> <471@infohh.rmi.de>
Sender: news@super.ORG
Reply-To: rminnich@metropolis.UUCP (Ronald G Minnich)
Organization: Supercomputing Research Center, Lanham, Md.
Lines: 13

In article <471@infohh.rmi.de> shimoda@infohh.rmi.de (Markus Schmidt) writes:
>I had the same Problem with my ST238R. It turned out that, the drive
>would not start in two of the four rest-prositions for the motor.
>After a night of trying and testing we found one of the power-transistors
>killed. 
Hmm, is the drive motor a stepper? 
Steppers will exhibit this sort of behavior, and you can have these
weird "won't start without help or in this position". 
You can have a blown driver and the damn things will work fine, just
won't start sometimes. Once they run, the intertia keeps em going.
Or are the drive motors standard servos. I suspected steppers as they 
are cheap.  Sounds suspicious ...
ron