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

[hwhall@aol.com]

The LF Push Bar gets moved by the end of the Function Bail. Normally, unless a LF signal has been decoded, the Function Bail should not be able to touch the LF Push Bar (close, but not quite).

Manually verify that the LF Push Bar can wiggle up & down - it may be jammed a little so that the spring can't pull it far enough down & clear of the Bail.

The tail piece ("Extension") of the LF Function Lever may have gotten bent during the move, so that it is holding the LF Push Bar just a bit too high even when the LF function has not been detected.

Can you figure out how to set up the vanes for a LF function? If you can, that should let the LF Function Lever rotate & then you can see if it's raising & lowering the LF Push Bar.

Attached is a video clip (MP4) showing the LF Function Lever extension/tail-piece moving the LF Push Bar up & down. In the upward position, it would be caught by the Function Bail & pushed backwards (thus initiating the LF at the platen).

Wayne
WB4OGM

On Thursday, July 24, 2025 at 03:11:11 PM MDT, john WA4KWK <wa4kwk at gmail.com> wrote: 

Wayne thank you so much for your efforts. The spring is there.... looks intact. Rotating the motor by hand.. the platen does a LF each cycle. Hard to see but the LF Push Bar moves cleanly each cycle. 
Not sure what to do next. But I will continue.

Thanks again,
John
WA4KWK

On Wed, Jul 23, 2025 at 7:36 PM hwhall at aol.com <hwhall at compuserve.com> wrote:
> Took some pics of the LF Push Bar, LF Push Bar Spring & LF Bail. The spring never showed in the usual drawings because it would've been behind the LF Bail, I guess. It's indicated in the attached photo by a round green dot.
> 
> When the Vanes encode for a LF, the LF Function Lever can rotate forward (toward typist) on a pivot near its lower-front end. That causes the LF Function Lever Extenstion (a sort of tail piece) to rotate upwards, lifting the LF Push Bar so that the step on its upper edge can be caught by the Function Bail, initiating the LF movements. For some reason, TBD by inspection, the LF Push Bar is sitting too high when characters are being printed - the same bail rotation that moves the typing bars is shoving the LF Push Bar when it shouldn't be.
> 
> I also have a short video of the LF Function Lever rotating & operating the LF Push Bar if necessary.
> 
> Wayne
> WB4OGM
> 
> 
> On Tuesday, July 22, 2025 at 04:56:20 PM MDT, john WA4KWK <wa4kwk at gmail.com> wrote: 
> 
> I can not find the 'Line Feed Push Bar Spring' anywhere. Not on the drawing or unit. Where is it located please?
> 
> John
> 
> WA4KWK
> 
> On Sun, Jul 20, 2025 at 8:36 PM E. <hanyou at xsmail.com> wrote:
>> 
>> Aaaaah, this is it — thanks for reminding me!  The same thing happened to me in the early days of my M15 year ago and I for the life of me could not remember what the solution was… it ended up being this!  Some of those springs are so small — if they happen to pop off while working on it, you’ll never know.  I ended up finding that spring on the floor, but prior to that, the same thing inflicted my 15/19 for a time (LF after each character).
>> 
>> 
>>> On Jul 20, 2025, at 2:34 PM, hwhall--- via GreenKeys <greenkeys at mailman.qth.net> wrote:
>>> 
>>> Harold's links to the adjustments confirms there should be a Line Feed Push Bar Spring to help position the bar. Even though some of the Teletype Corp drawings like I sent don't clearly show it. Perhaps that's broken or lost.
>>> 
>>> Wayne
>>> WB4OGM
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