RK05 Help

[Ashley Carder]

I agree with Tom's statements.  I had two RK05s that I messed with
standalone for a while and things did not seem to work properly.
When I cabled them up to the RK11D in the PDP-11, everything
was fine and they worked perfectly.  I may have had the exact same
problem that you describe when I tried to test things with
standalone drives.  Motors didn't run, etc. until the drive was
properly attached to a valid controller (in my case RK11D).

If you really get stuck and need to see what controls
supplying power to the blower, RK05J engineering drawings
are on bitsavers at:

http://www.bitsavers.org/pdf/dec/disc/RK05J_schem_Mar78.pdf

Ashley

> -----Original Message-----
> From: cctalk-bounces at classiccmp.org
> [mailto:cctalk-bounces at classiccmp.org]On Behalf Of Tom Uban
> Sent: Friday, March 18, 2005 3:40 PM
> To: General Discussion: On-Topic and Off-Topic Posts; General
> Discussion: On-Topic and Off-Topic Posts
> Subject: Re: RK05 Help
>
>
> AFAIK, the RK05 will not function without a controller attached. There are
> motor control relays which provide power to both the blower and
> the spindle
> motor and will likely not engage until the power supplies are valid, ACLO
> and DCLO are inactive, etc.
>
> --tom
>
> At 03:07 PM 3/18/2005 -0500, George Wiegand wrote:
>
> >Is there a safety lock switch (perhaps on the back) that is normally
> >activated when installed in a rack that is not activated now
> while it is on
> >the bench?
> >
> >Thanks,
> >George Wiegand
> >Vintage Data General Computer Hobbyist
> >----- Original Message -----
> >From: "Rick Bensene" <rickb at bensene.com>
> >To: <cctech at classiccmp.org>
> >Sent: Friday, March 18, 2005 10:13 AM
> >Subject: RK05 Help
> >
> >
> > > Hello,
> > >
> > > I have two RK05J drives, both exhibiting the same problem.
> > > They are *not* currently connected to a system.  I have them
> on the bench
> > > cleaning them up and getting them ready to connect to a PDP 8/e system
> >after
> > > a long period of storage.
> > >
> > > There is the I/O terminator card installed in the proper slot
> in the drive
> > > electronics backplane.
> > >
> > > When the drives are powered up, the "power" and "load" lights
> are on, and
> > > the door release is activated so that the door can be opened
> and a disk
> >pack
> > > inserted.  However, the blower motor that provides the air
> circulation for
> > > the drive never starts up.  I've checked both blower motors
> to assure that
> > > they are not seized, and the both spin very freely.  I traced
> the power
> > > wires from the blower motor to a barrier strip, where I checked for
> > > 110V AC power, and there's nothing there.  So, somewhere in the
> > > circuitry, something isn't right.  Any ideas?
> > >
> > > Thanks,
> > > Rick Bensene
> > > The Old Calculator Web Museum
> > > http://oldcalculatormuseum.com
> > >
> > >
> > >
> > >
> > > _____________________________________________________
> > > This message scanned for viruses by CoreComm
> > >
>
>
>