RD53 Restoration - Progress! - test-drb@ccmp.vtda.org

31 May 2010

On 31/05/2010 18:54, Rob Jarratt wrote:
...
  Thanks to the people on this list and one other
(thanks Matt!) I have got my
 RD53 working reliably now. I currently have it installed in a MicroVAX 2000
 with 6MB of memory running MicroVMS 4.6 and DECnet.
 I had to remove the old bumper which had become sticky. But to make the disk
 work I had to replace the bumper, so I used some folded over post-it notes
 taped to the top of the head assembly. This seems to work for now, but I
 fear a better solution is needed.  
You could try a thin bump-on rubber foot, as used on some small
electrical equipment.
...
  I also get a grinding noise which becomes
 apparent after the disk has warmed up. I think this comes from the graphite
 pad underneath. I plan to loosen the mounting bolts a little more to see if
 that gets rid of the noise, but I am wondering if there is any other way to
 get rid of it. Why is the graphite pad needed? What would happen if I
 removed it? 
It's an antistatic measure for the spindle.  Try bending it a little.
It's unlikely to do any harm running with it bent right our of the way
for a while, so you can find out if that's what's making the noise.
--
Pete                                            Peter Turnbull
                                                Network Manager
                                                University of York