Pens for TRS-80 PC-2 plotter - found. - test-drb@ccmp.vtda.org

1 May 2003

On May 1, 23:13, Philip Pemberton wrote:

...
  If someone wants to send me one or two plotters with
bad drive gears, I'd be
...
  willing to have a go at repairing them. My technique
involves repairing the
...
  damage with Araldite (epoxy adhesive - sets rock hard)
and then putting a
...
  small (#10) staple in across the damaged section.

Er, the gear we've been discussing is very small -- about 3mm overall
diameter, roughly the size of the winder knob on a small ladies
wristwatch!  MUCH smaller than a small staple, in fact the bore's
hardly bigger than the staple diameter :-)

Anyway, Araldite doesn't stick to waxy plastic like these gears :-(

...
  I'd be tempted to take a few 10ths of a mm off the
inside of the hole
 for the shaft that the gear fits onto. If they're cracking, the shaft is
...
  probably too big for the hole. 
Enlarging the hole by 0.1mm would make it spin on the shaft :-)

-- 
Pete						Peter Turnbull
						Network Manager
						University of York