[GreenKeys] Model 15 "LAZY S"

[Jim Cooper]

On 13 Mar 2022 at 21:31, Joe Duszy´nski wrote:

> Anyway, After replacing both end
> frames fresh new carriage draw belt
> and a zillion adjustments later she
> runs like a champ EXCEPT in about the
> first 8 character positions it plays
> lazy with just the letter "S" see
> attached photo. 

Is it possible the left end frame is slightly 
distorted or not mounted exactly right ? 

My first step would be with motor off and 
loop supply on (mark) and keyboard in series 
with loop ...  slowly turn the motor (in proper 
direction, of course!), press S on keyboard, 
continue turning the motor slowly ... the keyboard 
should key the loop and since it is running off the 
same motor pinion as the tu main shaft, the sel. 
magnet should respond to each bit of the S code 
as it is keyed by the keyboard.  When it gets to 
the time for the type bar to be slammed on the 
platen, go more slowly and watch / feel / move by 
hand the S typebar ...  see if it is binding somewhere 
or being pushed off true by something.   This slow-mo 
won't analyze 'momentum' problems, but it might give 
a lead on alignment or binding problems. 

> After about the 8th character
> position it seems to print fine. 

Not really.  the S is still not printing as solidly 
as all the other letters, though after '8' it does 
print a bit better.  Something is awry with the 
S typebar, imo. 

w2jc