On 07/16/2017 04:50 PM, Paul Berger via cctalk wrote:
That print technology was pretty common everywhere but at
IBM for high speed line printers. When I was in college
the service bureau that processed our FORTRAN had one that
if I remember correctly was made by Honeywell and featured
wavy print lines. The operators told us that printing
graphic was very hard on this printer because if you
printed a whole line of the same character every hammer
fired at once, it made an awful racket and visibly shook
the printer.
I had a Honeywell printer like that. Actually, the even and
odd characters were skewed half a letter apart, so it would
print all even characters at one time, and all odds at a
slightly later time. So, it only had 66 hammer driver
circuits, and two power busses driven by giant SCRs. It
didn't print wavy lines if the sprocket feeds were properly
set for the paper size.
Jon
