[GreenKeys] New Model 15 owner, getting it cleaned up and running!

[Duncan Brown]

Steve,

After re-reading your comments, I may have mis-interpreted them.

Are you saying the motor speed changes or the typing rate?

If you have a series-governed motor (black & white striped wheel on end 
of motor), there are brushes that may need to be replaced and/or 
commutator contacts that need to be cleaned.

Good Luck,

Duncan
K2OEQ


On 8/2/2024 5:40 PM, Duncan Brown wrote:
> Steve,
>
> Welcome to the group & the would of TTYs!
>
> I would look into the area of the selector magnet.  It sounds like 
> maybe the armature is not dropping when a new character comes in. Try 
> increasing the spring bias on the armature.
>
> I can't give  you any more specifics as I am mainly a Kleinschmidt guy 
> (US Army TTY repairman), although I do maintain a few M15. M19, M28 
> for the AWA Museum.
>
> Good luck & Have fun,
>
> Duncan Brown, K2OEQ
> USASA    31J30
>
> Antique Wireless Association
>  Communication Technologies Museum
>    Asst. Curator, Commercial Equipment
> (also chief TTY op & repairman)
>
> i-Telex: 212503
>
> www.antiquewireless.org
> AWA Youtube channel: 
> https://www.youtube.com/channel/UCX55peBhzeX1qps_VYXdLBA
>
>
> On 8/2/2024 4:45 PM, Steve Kittelsrud wrote:
>> Hi All,
>>
>> I am a new Model 15 owner, and am currently going through the machine 
>> trying to get it working to spec and receiving correctly. I have some 
>> spare parts already ordered from Paul @ RTTY Electronics, but have 
>> some issues I need some help with.
>>
>> I have cleaned most of the bad grease and oil out of and off of the 
>> unit, I removed the main drive shaft last night, disassembled and 
>> cleaned everything and reinstalled in the machine but I am plagued by 
>> a problem. When running using the Mike Douglas converter and the itty 
>> stream, I get intermittent typing speeds when characters come 
>> through. It is steady for a few seconds and I get readable copy, but 
>> then it slows down and almost stalls (it was stalling and slipping 
>> the drive gear until I aligned the motor shaft and drive gears) I 
>> thought a good cleaning of the main drive shaft would help, but it 
>> still slows down and does not get good copy.
>>
>> My question is: What else should I look to adjust? The army manual I 
>> received with this unit does not have a good troubleshooting section 
>> and is fairly hard to find stuff in (It helped me remove and rebuild 
>> the main shaft however!)
>>
>> Could it be a bad motor, or is there an adjustment I am missing? Some 
>> torque setting or clearance somewhere?
>>
>> Thanks in advance, I hope to get this unit up and running to use 
>> online with the itty feed and also with RTTY on the air.
>>
>> Thanks!
>> Steve
>> KB0WSV
>> Sioux Falls, SD
>>
>> -- 
>> Steve K.
>>
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