8 May
2013
8 May
'13
5:17 p.m.
----- Original Message -----
From: "Tony Duell" <ard at p850ug1.demon.co.uk>
To: <cctalk at classiccmp.org>
Sent: Wednesday, May 08, 2013 8:37 PM
Subject: Re: stepper motor on S100 buss terminator
DaveH
The board is
silk scrrened so its not a home built lashup, 5 wire on
tyhe
motor so it could be 4 pole star, but only 2 dfrive transitors ?
I thought the TO220 packages o nthe PCB were most probably 3-terminal
regualtors (7805-things) to supply the terminators. The stepper driver is
those ICs hung off wires on the solder side. And it's quite possible
there's a driver IC amongst them.
-tony
Arrr ,that will teach me to look before I type, haddent spotted the pic
of the other side DOHH -----
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