[GreenKeys] M15 printing gibberish

[John, W9DDD]

Polarity matters only if there's a line relay involved.  Straight to 
magnets shouldn't matter (or else I've hit it lucky every time)  I can 
attest to the line relay being polarity sensitive. I won't tell you how 
long it took me to see the little plus sign on the WD. Up to that point 
every (6 or more over the years) 28 or 15 I worked on had no line relay. 
The line relay is polarity sensitive because the bias winding has put it 
in that condition.


On 1/30/2025 1:09 AM, E. wrote:
> Polarity *should* matter — at least diagrams suggest.  Looks like one of your vanes are a little bent… but it sounds like the motor isn’t keeping a proper speed.  Are the two dash post on the motor oiled?
>
> Now having watched the video a fifth time, it looks like your type basket is inconsistent on striking.  There should be a consistent back and forth distance with the part that slides between the printing bail.  Is that one part on the typing basket (which I can’t find the name for right now) properly seated between the two metal pieces on the bail?
>
> It also might have to do with your type basket not progressing and hitching up things maybe… I’d focus on whatever is causing it to not move and see if that frees up the rest.
>
>
>> On Jan 29, 2025, at 11:07 PM, steve bennett via GreenKeys <greenkeys at mailman.qth.net> wrote:
>>
>> Does polarity of the TU matter if I'm connected directly to the selector magnets? (no line/polar relay)
>> I wouldn't think so.
>> When I turn on the TU the machine stops running open. The magnet pulls in and  holds.
>> When receiving ITTY machine types but it's the wrong characters....gibberish.
>> The meter on the TU reads a little over 60mA.
>> How many teeth should my gear have for ITTY?
>> Maybe it has been sped up?
>> You can hear the speed of my machine at the link I posted previously.
>> I'll include it again here.
>> Using ITTY to test a Teletype machine
>>
>> Using ITTY to test a Teletype machine
>> Discover topics like model 15, teletype, itty, and the magic of the internet at Imgur, a community powered enter...
>>
>> -Steve
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The above comments or recommendations are SWAG. Use at your own risk.

John, W9DDD