On 11/10/18 10:47 PM, Alan Perry via cctalk wrote:
Today I picked up a Rainbow 100. The seller bought it new for a
specific need and he says that it had been sitting in his barn since
'84. It looks like it was a dry barn because things look pretty clean
for the most part aside from a thick layer of dust on everything.
What I got was the system unit, a VR201 monitor, a keyboard, a
vertical deskside stand for the system unit, and a LQP02 daisy wheel
printer. I also got the MS-DOS and CP/M doc and software slip cover
boxes. The CP/M disk box is still sealed and the CP/M docs are still
in shrink wrap. The specific need that the seller bought it for
involved MS-DOS, not CP/M.
I last saw a Rainbow 100 in college around the time that the seller
stopped using this system, so I am getting familiar with it now. I
haven't powered anything on yet.
...
2. The belt that moves the print head is dried out and looks like, if
the motor put any load on the belt, it will fail. Is any kind of
replacement available?
In case anyone else has a similar issue (including people searching the
list archives in the future) ...
I found a replacement for the belt on the LQP02.
The belt is 10mm wide and the tooth pitch is 2mm. It was tricky to
measure since, when I touched a tooth with the calipers, the tooth would
break off or disintegrate. Using those parameters, I searched and found
"BALITENSEN 5 Meter GT2 Open Timing Belt 10mm Wide 2mm Pitch for CNC 3D
Printer Mendel Rostock Reprap" on Amazon. The old belt is under 37"
long, so this 5 meter long piece that I got was long enough for a couple
spares.
I got the belt today. Cut a piece to length, installed it in the
printer, and powered the printer up. The belt works so far.
alan
