Paul Berger wrote: > On 2023-01-29 12:25 a.m., Chuck Guzis via cctalk wrote: > > On 1/28/23 20:20, Paul Berger via cctalk wrote: > > > > [snip] > > believe it is the same > > as the 029. The printer in the 1052 is a keyboardless Selectric with no > > tab rack and they spaced via a cam on the OP shaft instead of taking a > > cycle. The ones I saw on a couple 360s (22 and 25) the space cam was so > > worn it wobbled when it took a cycle, but the customer would never let > > us do anything with it as long as it worked because they could not do > > anything with out the console. Was the 1052 more or less durable than the > > model B > > adapted for the 1620? > > With its movable carriage, it always seemed to be in danger of > > self-destructing--the thing would shake a bit then a carriage return was > > executed. > > > > --Chuck > > My experience is that they where pretty durable, I never saw a lot of > 1052s by the time I started in 1979 there was not a lot of 360s in our > branch. [snip] > > I don't know how they would compare to a model B that was used as an I/O > I never saw any systems that used one. I would imagine that moving the > heavy carriage back on something that is printing steady would be a > trouble spot. I would image that kind of use would also be hard on the > power roll that drives the type hammers into the paper. I don't image > they would be very fast, a Selectric could print at 15.5 characters per > second and at that speed the cycle clutch never latched it was just one > continuous cycle. Selectric I/Os that ran at full 15.5 chars/sec > suffered way more problems than ones that printed at a lower speed.
The IBM Model B electric typewriter was used as a printer and keyboard entry device on at least the Bendix G-15 (mid 1950s) and the IBM 1620 Model 1 (1959). On the G-15 it ran at about 8cps (timing was determined by the drum rotation). On the 1620-1 it ran at 10cps. And yeah, they probably took quite a beating, since many sites did not have a line printer. The 1620 Model 2 (1962) used a Model 731 Selectric and drove it at 15.5cps. Paul K
