[GreenKeys] Model 33 print issues

[Jones, Douglas W]

The model 33 I'm working on is getting better, good enough that we've run a torture
test.  The results are presented here:
-- http://www.cs.uiowa.edu/~jones/pdp8/UI-8/log.shtml#2017-03-07

Lots of quick brown foxes and repeats of the alphabet at full speed read from a loop of
paper tape with no pause (no nulls or rubouts in the tape, just data).

The result is pretty good except for the letter W and sometimes V, where bit 4 sometimes sticks as 1 when it should be 0, but only at high speed.  (When you type, it's almost always correct).

At this point, we've tried everything, including looking for electronic glitches, adjusting the rangefinder (again) re-greasing the selector parts (what a mess) and
polishing the "comb" that keep the selector blocking cams aligned.  Any thoughts?

		Doug Jones
		jones at cs.uiowa.edu