[GreenKeys] M-15... Auto Line Feed After every printed character

Sun Jul 20 15:17:49 EDT 2025

This arrived late, hence my previous comment about not seeing the images.
This is what I expected to see. It is consistent with the LF Push Bar inadvertently being engaged by the Function Bail on every print cycle. There's something bent/broken/stuck or a missing spring associated with that Push Bar.  You have to examine it closely.  Maybe one of us can take some photos of a worked one for comparison?

Wayne
WB4OGM

On Sunday, July 20, 2025 at 12:40:10 PM MDT, john WA4KWK <wa4kwk at gmail.com> wrote: 

All printing is very clean. With a local loop and keyboard the line feed is after each character typed. Please see attached. Also with the loop current off and the 15 running open it is doing constant line feeds. Not sure if that matters or not. I have attached a pdf and jpg file to show how clean the typing is. 
I want to thank you guys for trying to help me out. 

John
WA4KWK

On Sun, Jul 20, 2025 at 12:31 PM John, W9DDD <w9ddd at tapr.org> wrote:
>  
>  
> At the risk of beating a dead horse.
> 
> It would appear to me that the Line Feed Push Bar is supposed to drop down to its stop at the end of each cycle.  That doesn't seem to be happening fully and the Function Bail manages catch it each cycle.  I think that the accurate print excuses the LF Function Bar from being an issue.  If it didn't retract it would interfere with the printing ... unless there's enough loose tolerance to allow it to clear the Vanes, but not let the LF Push Bar end to drop enough to the clear the Function Bail.  
> 
> One thing that I don't understand is what ensures that the complete LF linkage returns to its resting position after moving the platen.one line up.  I'd have thought there to be a spring somewhere, but I don't see if on figure 21.
> 
> 
> 
> On 7/19/2025 8:18 PM, Jim Cooper wrote:
> 
> 
>>  On 19 Jul 2025 at 17:12, john WA4KWK wrote:
>> 
>> 
>>>  Perfect typing just a line feed after every character.
>>> 
>> Keep in mind, we're dealing with MECHANICS with these 
>> monsters ... not electronics!   we can SEE how the mechanics 
>> work, and we can run them in slow motion. 
>> 
>> Have you turned off the motor, connected the kbd and the 
>> selector magnet in a local look, turn the motor (in the 
>> proper direction), press a key on the keyboard, keep turning
>> the motor and WATCH the mechanics ... you should see the 
>> selector magnet select the 5 codes of the key you pressed; 
>> then you should see the transfer levers moving into place 
>> (clearly these are working correctly as you get correct 
>> characters printed); just keep turning the motor BY HAND 
>> and watching.  Watch carefully when the typebar is thrust 
>> toward the platen -- watch the LINKAGE that ratchets the 
>> platen to the next line.  there is a lever that pulls a ratchet 
>> that snaps the platen to the next 'notch' for the next line. 
>> 
>> SOMETHING releases that lever ... you need to keep 
>> sending characters from the keyboard and turning the 
>> motor by hand until you can SEE what is tripping that 
>> LF lever ...  then look for the adjustment related to that 
>> lever and ratchet pawl.  It's all mechanical and adjustable. 
>> 
>> I just read Wayne's response to you, with the very nice 
>> graphic drawings ... but I'm going to send my response 
>> anyway just to reinforce his suggestions !!
>> 
>> good luck with it. 
>> 
>> w2jc 
>> 
>> 
>> 
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>>>  
>>>>  
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>>>>> 
>>>> 
>>> 
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> 
> -- 
> ---
> ----
> The above comments or recommendations are SWAG. Use at your own risk.
> 
> John, W9DDD
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>>>> 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
> 
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>>> 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

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