8 May
2016
8 May
'16
1:30 p.m.
Actually, many
lines of drives, such as the Tandon TM100 have the
same circuitry for both the 48tpi and 96tpi variants. (and the
TM100-4M at 100tpi)
One of the things that endears to me those pieces of garbage is that they apparently changed PCB designs according to what
parts they had on
hand. I've got at least three different versions of the TM-100 PCBs,
depending on the head stepper used (4 wire/6 wire). Some were better
than others.
HP used the TM100 in some of their machines. Oddly, the PCB is electrically
identical to the normal Tandon one (even down to having jumper options that
are never used in HP machines AFAIK) and has the same layout but is built like
an HP board (entirely gold plated) and many of the ICs have 1820-xxxx numbers.
-tony