[GreenKeys] ASR-33 problem

[Teletypeparts]

Charles,

Mike has picked up 33 mechanics very well and has given good advice.  I will forward my first reply to him about working in Local.

Wayne




-----Original Message-----
From: Mike Douglas <deramp5113 at yahoo.com>
To: Charles <charlesmorris800 at centurytel.net>; greenkeys <greenkeys at mailman.qth.net>
Sent: Tue, Jan 28, 2014 3:08 pm
Subject: Re: [GreenKeys] ASR-33 problem



Charles,


If your 33 is punching the correct value for CR and LF every time, then the selector, blocking bars and codebars are all working properly. This means the function bars for CR and for LF are either not rising properly or their respective pawls are not engaging properly. 


The fact that the print head prints a character when a CR of LF fails further isolates the problem to the function bar not rising fully (when a function bar rises, it blocks the print suppression bar from rising, which in turn prevents the print head from printing. This happens independent of whether or not the pawl engages, so your function bars are not rising fully).


If you haven't already, I'd start with re-lubing all points the function bar touches anything -- especially in the function block slots. If that doesn't help, then look closely at the function bars and verify they are as perfectly straight as possible -- especially between the function block slot in the back and the guide slot nearer the front.


Mike






On Tuesday, January 28, 2014 7:28 AM, Charles <charlesmorris800 at centurytel.net> wrote:

My ASR-33 has an interesting problem. Sometimes it does not "print" a
carriage return, but echoes a dash ("-"). Same for a line feed which
echoes as "*".

The tape punch, however, shows the correct code, so it's not a
distributor problem. Punching a tape with repeated CR's, which I can
see has the proper code, also sometimes returns the carriage several
times in a row, but then will print a dash.

So the problem is somewhere between the codebars and the typewheel,
and looks like a single bit sticking high (mark). Any hints?

thanks
Charles

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