[GreenKeys] Odd Print problems on ASR 33

Wed Jul 24 01:51:25 EDT 2013

Thanks everyone for your replies.   I believe I have narrowed down the
problem.   I found a linkage that was sticking when the problem
occurred.    I followed the linkage which connects to the "Rotary Drive
Arm" through the "Third Pulse Lever".   The drive arm is sticking under
the right "rack" that rotates the print head.   The "rack" is extended
farthest on characters like the letter "O" that is causing the problem
and allows the "Rotary Drive Arm) to get under the right "rack".   It
will dislodge by itself with some characters like "line feed".   I can
pull back slightly on the left "rack" and it will pop back up where it
belongs.   I have included page 4-48 of the manual
(273B_Mod32_33_TechMan_Jan63.pdf from Bitsavers).    I'm not sure if it
needs adjustment or a part is worn.   I don't want to start bending
linkages without knowing what I'm doing.

I appreciate any help you can provide.

Clay

________________________________

From: Teletypeparts [mailto:teletypeparts at aol.com] 
Sent: Tuesday, July 23, 2013 1:30 PM
To: asekely at hotmail.com; Clay Archer; greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] Odd Print problems on ASR 33

Clay,

Andy has given you good advice, but dont make any adjusments until you
check for debris in the typewheel area, missing springs and broken or
loose carriage bearings as I mentioned before.  

Wayne

-----Original Message-----
From: zeke440 . <asekely at hotmail.com>
To: Clay Archer <clay at archerservices.com>; greenkeys
<greenkeys at mailman.qth.net>
Sent: Tue, Jul 23, 2013 4:08 pm
Subject: Re: [GreenKeys] Odd Print problems on ASR 33

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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