HP card reader and tape drive repair (was: New finds .... 2 HP-85's!)

From: Stan Perkins <swperk_at_earthlink.net>
Date: Wed Oct 18 13:04:24 2000

John Allain wrote:
>
> Anybody out there Ever refab HP rollers
> ( 41C+, 65, 67, 85, 86, etc. ) ??
>
> Wish I could remember where I got some
> strong rubber contact cement a while back.
> Seems to me that you could get by just by
> scraping off the old stuff and drying a
> few coats of that.
>
> Alternate method:
> short sections of the appropriate size
> lab tubing with epoxy backing.
>
> John A.

Actually, I've repaired my share of HP-41, -65, and -67 card readers
using short lengths of the silicone tubing that is used as fuel lines by
model airplane builders. Most hobhy shops have a good selection of this
tubing in various sizes and thicknesses, and one foot of it will repair
dozens of rollers!

I've used a different technique on the HP-85 tape drive (same as in the
HP 9815, 9825, etc.). I remove all of the goo from the drive wheel, and
cover the bare aluminum wheel with three layers of thin wall heat shrink
tubing. It seems to work fine, but be aware that the drive wheel is now
a bit harder than the original, so be sure not to leave your data tapes
idle in the drive for long periods or it *may* dent the wheel in the
cartridge (although I've never had this happen to me).
 
Regards,
Stan
Received on Wed Oct 18 2000 - 13:04:24 BST