[GreenKeys] M26 suddenly stopped coding, stuck on blank

[David S]

Some notes on text formatting I have so far since I have been slogging 
through this recently:

Things for your teleprinter to print and the significance of RYRY in 
teletype Baudot – Stickelman.net 
<http://stickelman.net/index.php/2025/01/07/things-for-your-teleprinter-to-print-and-the-significance-of-ryry-in-teletype-baudot/>

I am sure I have some errors so I would welcome corrections. People 
familiar with teletypes will know these text formatting concepts, but 
someone coming from modern printing will find these concepts foreign 
like I did.

Embarrassingly, I just corrected an issue with my machine where I 
greased the code bar mechanism in an attempt to reduce wear/improve 
longevity (Model 28).  The result was the individual fingers/levers 
could not travel reliably in an independent way since they were semi 
glued together and I got similar unreliable print like you are.  Maybe 
the individual mechanical levers moved by the selector magnet are gummed 
up with something?

On 1/8/2025 11:48 AM, W2HX wrote:
>
> This might be obvious, but many of these teletypes don’t have 
> automatic carriage return/line feed. So you should make sure that the 
> source data is sending those to the printer. MMTTY might just be 
> word-wrapping the text as it is displayed on your screen.
>
> 73 Eugene W2HX
> My Youtube Channel: https://www.youtube.com/@w2hx/videos 
> <https://www.youtube.com/@w2hx/videos>
>
> *From:*greenkeys-bounces at mailman.qth.net 
> <greenkeys-bounces at mailman.qth.net> *On Behalf Of *Jomar Quilatan
> *Sent:* Tuesday, January 7, 2025 9:41 PM
> *To:* greenkeys at mailman.qth.net
> *Subject:* [GreenKeys] M26 suddenly stopped coding, stuck on blank
>
> Hi all,
>
> I'm still in the process of reviewing the M26 documentation I have, in 
> order to narrow down a sudden issue, but just wanted to throw it out 
> here in case the diagnosis is surface level.
>
> I was transmitting a text file from MMTTY onto my machine and all was 
> well until I noticed the carriage was roughly at the end of the line 
> and was not performing a carriage return, even though MMTTY was moving 
> along as printed in the text file.  I was expecting to see overlaid 
> characters on my copy, but to my surprise, it was blank.
>
> The line where it happened was only supposed to be printing periods 
> and ringing the signal bell in varying alternations--towards the end 
> of the line, it started printing out a few numbers (namely 3 and 5), 
> then went to blank.  (Looking at the Baudot it seems like 3 involves 
> only the 1st selector and 5 only involves the 5th selector).  Almost 
> seems like something that engaged the levers weakened abruptly.
>
> I switched to transmit on my unit, and the result was the same - any 
> keystroke would cycle the machine but none of the selectors would engage.
>
> I don't know if I can fully rule out the selector magnet, but that was 
> one of my thoughts (maybe loop current suddenly increased due to a bad 
> resistor, etc).  Another was the actual assembly from the magnet to 
> the selector levers--but, observing that area at surface level, things 
> seemed to be moving as intended.
>
> Any recommendations on what I should look at, if not in either of the 
> above areas?
>
> Thanks in advance.
>
> Regards,
>
> *Jomar **(Joshua Martin)** Quilatan*
>
> Mississauga (Toronto), Canada
>
> RA 0-8045
>
>
> ______________________________________________________________
> GreenKeys mailing list
> Home:http://mailman.qth.net/mailman/listinfo/greenkeys
> Help:http://mailman.qth.net/mmfaq.htm
> Post:mailto:GreenKeys at mailman.qth.net
>
>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:https://teletype.net/gksearch
>>>> 2002-to-present greenkeys archive:http://mailman.qth.net/pipermail/greenkeys/
>>>> 1998-to-2001 greenkeys archive:http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:http://comcents.com/tty/greenkeyssearch.html
> This list hosted by:http://www.qsl.net
> Please help support this email list:http://www.qsl.net/donate.html
> Message delivered todavid at stickelman.net
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20250108/355f7d72/attachment.html>