[GreenKeys] 28 motor repair

[John, W9DDD]

An impressive page.  It is a page I'm going to bookmark.

The pictures of the inside of the motor are very useful.

I'm jealous of your answerback button.  Back in Teletype phase 1, I had 
a keyboard with it and you  could still order the parts, so I coded for 
my call sign.  Here I am 40 years later on phase 2, guess I'll have to 
cheat and use a microprocessor.  Actually if I can find the stepper I 
saw a couple of years ago in the garage and it's suitable, I can use it 
with the LD to accomplish the same. (I think I also have the kit for 
adding the Here Is button on a keyboard.  Will look strange on an RO?

---
----
You said "tomorrow" yesterday.

The above comments or recommendations are SWAG. Use at your own risk.
John, W9DDD

On 1/18/2024 8:47 PM, Ethan Blanton wrote:
> John, W9DDD wrote:
>> So, should I buy some of the fancy wire used as motor leads and re-do the
>> wires on the motor myself.  Or take it to a motor shop and let them do it
>> for a lot of dollars.  Are they gonna talk me into bearings and some other
>> extra things, ya know just in case?
> My solution to this problem is here, search for "Motor Unit":
>
> https://kb8ojh.net/station/teletype/
>
> I had a very similar situation, removing and cleaning various parts
> led to cracked motor wiring; in my case, I noticed not because I saw
> the cracks, but because it started tripping the GFCI.  I disassembled
> the motor far enough to remove the rotor and get to the ends of the
> winding, and covered over with shrink tubing.  It's not a perfect fix
> (it's kind of ugly, and the insulation lashed into motor the windings
> is just as brittle -- if less mobile), but a decade or so later that
> TTY is still running strong -- it's now in my office on campus, and I
> demo the Model 28 for students or other faculty members a few times a
> semester.
>
>> I've seen the insides of perhaps a 100 5-200 HP motors over the years and
>> those wouldn't scare me, but I suspect this little 1/20 HP might be a little
>> more challenging.
> It's not as bad as you think!
>
> Ethan