[GreenKeys] Odd Print problems on ASR 33

[zeke440 .]

Clay 
If the tape punches correctly the keyboard and TD are good.... at least the indication points to a printer problem.   You seem to be spot on with "Home position" of the Typewheel" (Head) being the problem.
 
The the problem your explaining here is a TypeWheel Rotational problem.
Your prob apears to be a reversed motion of the type wheel after a failed reset.
Spring tension may explain the intermittent problems or a pry adjustment may be slipping due to wear or a loose screw ?  Although you may find other problems along the way ...?... its mainly happening to the one incorrect character and intermittently others
 
Find Bul 310B Vol 2 Sec 574-122-700TC  (Not sure which site I found it before)
look at the "Carriage area" (pages 50 - 69)
 
Several "pry point adjustments and Spring tension's that could be the gremlin here.
 
2nd row of the type wheel:  (movement direction of the type wheel from home.)
 
G F E D C B A @ H I J K L M N O
|......................| |.....................|   (  clock wise        counter clockwise) 
 
The type wheel layout can be found in Bul 310B Vol 1 Pg 22 ( I have Iss 3)
and the operation of the rotary positioning mechanism are on pg's 22 - 26.
 
 
Does anyone know if they are available on-line anywhere yet?
 
I can attempt to copy these pages for you if they arn't...
(I have the 310B vol 1 & 2 ASR/KSR/RO principles of operation and adjustments also Bul 1184B parts.) 
 
 
 

 Andy 
 
Date: Mon, 22 Jul 2013 01:31:14 -0600
From: clay at ArcherServices.com
To: greenkeys at mailman.qth.net
Subject: [GreenKeys] Odd Print problems on ASR 33














I have a model 33 with an intermittent printing problem.   Actually,
it seems to be getting worse.   I believe it’s in the print
head lift / rotate area and not an ASCII decoding problem.   It only
happens to a few characters and not related to a particular bit.   It
will also punch the correct bit pattern while printing the wrong character.   It
will print correctly all characters except the letter “O” which
will print the letter “N”, then other characters will begin to
print wrong like “A” will print an “I” (but only after
trying to print an “O”).  Things will go back to normal after
a carriage return.   The letter “O” will print correctly
at the beginning of the line a couple times and then start printing “N”,
like OONNNNNNN (all letters should be “O”) but it will punch all “O”’s
correctly on the paper tape.  Another example: if I type “AAAAAAAOOOOOOAAAAAA”
 it will print “AAAAAAANNNNNNIIIIII”   Other
characters will print wrong, but only after you try to print an “O”.
  It’s like the letter “O” is confusing the positioning
on the head.  I think other characters will also cause the problem intermittently.

Any ideas?

Clay

 







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