[GreenKeys] TTY Mod 33 adjustment progress

[drlegendre .]

"Doug! I am totally amazed at the lengths you go though to make your 33
work!"

Ed,

Not to put too fine a point on it, but what other options does he really
have? Once you throw up your hands & quit, it's OVER and you FAIL.. and
that's just not how things get done.

In addition to a strong, flexible and teachable mind, one requires some
real tenacity. Absent the latter, the former are of little use.



On Tue, Sep 27, 2016 at 10:38 PM, Ed Sharpe Archivist for SMECC via
GreenKeys <greenkeys at mailman.qth.net> wrote:

> Doug! I am totally amazed at the lengths you go though to make your 33
> work!
>
> Kudos!
>
> Ed Sharpe Archivist  for SMECC
>
>
>
>
> In a message dated 9/27/2016 2:24:09 P.M. US Mountain Standard Time,
> douglas-w-jones at uiowa.edu writes:
>
> We've made progress on the Model 33 we're fixing here at the U of Iowa:
>
> We had a problem with only being able to print odd-letters, giving:
> You type:  ABCDEFG 0123456789
> It prints: ACCEEGG 1133557799
>
> I found that the rear rail of the carriage was out of adjustment.
> Adjusting this was "lots of fun".  I actually had to buy a new foot-long
> screwdriver to reach the right-side mounting screw, and then grind it a bit
> narrower to fit the screw.
>
> Then, to the cause of the even-odd problem.  The carriage stop plate and
> guide plate reset were both out of adjustment, causing stop-slide number 1
> to hang up in the up position.  After adjusting these, the print trip lever
> release needed, but then there was a huge improvement as seen in the second
> photo here:
> -- http://homepage.cs.uiowa.edu/~jones/pdp8/UI-8/log.shtml#2016-09-27
>
> This is a big step:  You can now type readable but garbled text!  The
> first-letter spacing problem is obvious (but each time we remove the
> platten to get at other adjustments, we'll have to re-adjust the dash pot,
> so this will be put off for last).  More important, on random keypresses,
> it stutters, so you type just O and it gives OOO, and every once in a
> while, it seems to randomly substitute letters, for example, N for F, or
> back-arrow for W, or up arrow for T.
>
> My guess is that the stuttering has to do with fine adjustments needed on
> the distributer clutch, but it could be something hanging up in the
> keyboard.  Some time ago, we found a bit of trouble with the repeat latch
> there  (the repeat key does work).  We'll attack that next.
>
>         Doug Jones
>         jones at cs.uiowa.edu
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