Re: [TCML] Treadmill Motor Question

[Yurtle Turtle <yurtle_t@xxxxxxxxx>]

I have a three phase motor on my current ARSG, but I've managed to kill two vfds, and am thinking ahead for if my last one finally dies. If I make the move to my treadmill motor, I'll likely take it to a machine shop. I figure they could do it for $100 or less. I have the original speed controller, but can use a variac and full wave rectifier if that dies.




________________________________
 From: David Rieben <drieben@xxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx> 
Sent: Monday, September 9, 2013 9:21 AM
Subject: Re: [TCML] Treadmill Motor Question
 

Hi Steve,
 
Thanks for the advice. However, that won't be quite as simple as it sounds for me.
Number one, I don't yet own a drill press (maybe I can request that Santa help
me out with that this upcoming Holiday season) ;^) Also, even with a drill press
at hand, for me to be able to get the holes perfectly aligned to the point that the
resultant flywheel/rotor would still maintain a decent balance up to several thou-
sand rpms - well, there's probably a better chance of a blizzard in Singapore ;^)
Besides, I already have a fully functional ARSG built into my current big coil. I
just happened to end up with this extra treadmill motor when my old treadmill's
electronic controls finally went haywire, so of course I had to salvage that nice 
motor before placing the rest of the machine on the curb for trash pick-up.
 
David
 
 

From: Steve <youngster@xxxxxxxxx>
To: 'Tesla Coil Mailing List' <tesla@xxxxxxxxxx> 
Sent: Sunday, September 8, 2013 8:15 PM
Subject: RE: [TCML] Treadmill Motor Question


David,

Just center your flywheel on your rotor, clamp the two together, and drill
13 holes through both.  Then use machine screws with two nuts (for safety)
to fasten it.  If your machine screws stick out some, you can add more nuts
on a few of the screws to help balance your rotor.  This worked fine for my
RSG.

Steve Y.

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of David
Sent: Sunday, September 08, 2013 5:08 PM
To: Tesla Coil Mailing List
Subject: Re: [TCML] Treadmill Motor Question

Adam, 

I'm out of pocket as far as getting to it to look at it today but the shaft
looked to be 1/2" diameter with a pretty course left hand thread - about the
same as those on the end shafts of a typical bench grinder. I ended up
putting the wheel back on mine as the flywheel also acts as the cooling fan
and the motor guts get warm pretty fast when ran without the wheel in place.
Looks like drilling and tapping my wheel would be pretty dicey as there are
an odd 13 veins to circulate cooling air to the motor. Makes mapping out
evenly spaced "pie cut" lines to located drill points quite challenging for
my very limited machining skills :-( 

David

Sent from my iPhone

On Sep 8, 2013, at 9:08 AM, Yurtle Turtle <yurtle_t@xxxxxxxxx> wrote:

> David,
> Did you ever do anything with your treadmill motor? Looking at mine, I
think I could easily drill and tap the "fan/balancer", to attach my rotary
disk. I haven't unscrewed mine yet, as you did. What size is the shaft?
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