Got a Rainbow 100 and ...
Alan Perry
aperry at snowmoose.com
Tue Nov 13 17:15:35 CST 2018
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
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