Re: ATM Why a star lap? Now machine grinding..

[Joseph Goins <jb_goins@yahoo.com>]

How useful would a motor from a treadmill be?  I have an old treadmill
that no one uses.  Could it be used for a grinding machine?

Joe
--- Joseph Johnston <usc@sover.net> wrote:
> 
> Hey Tyrone,
> 
> <I'm interested in how you got that thing together.>
> 
>      http://www.sover.net/~usc/grinder/front%20grinder.jpg
>      http://www.sover.net/~usc/grinder/rear%20grinder.jpg
> 
> 
>      Well I'm not sure exactly how you mean that. I guess I just
> "built it". I know that's
> not what your looking for as an answer
> though. Let me see if I can elaborate and make some intelligent
> comments.
> 
> 1. I reverse designed/built it by knowing the size mirrors I was
> interested in making.
> That gave me some dimensions to start
> with, i.e. height, width & depth.
> 
> 2. I had some Unistrut (do a search on the net to find out more about
> it or contact a
> local electrical supply house, they'll know
> about it) along with the associated hardware to connect corners,
> rails, supports & legs.
> Hardware like angles with different
> lengths; flat "T's" for "butt" joints; regular 1" & 1 1/2" X 3/8"
> bolts with special
> Unistrut nuts that don't allow "spinning" when
> tightening. These nuts allow "blind" (unreachable with a wrench) nuts
> to be tightened.
> Also different sizes of washers for bolts
> and spacing of angles and for pivot points. That should cover the
> framing.
> 
> 3. I used two "pillow block" bearings (again try the net for a better
> description) for the
> main platters rotational axis. The platter,
> $10.00, is from a salvage yard. It's a 75 lb piece of machined
> aluminum from an IBM throw
> away. Thank you Jesus. I used a
> plumbers pipe mounting plate for its rotation pivot, (the mounting
> plates you usually see
> used on the ends of 1 1/2" or 2" pipe hand rails where they're
> attached to concrete
> stairs).
> 
> 4. The platter's motor is a variable, 0-300 RPM, AC motor I picked up
> at a salvage yard 10
> years ago for $25.00. It turns the platter and has an idler tensioner
> to keep the belt
> snug.
> 
> 5. I made the tables drip/catch pan out of 18 ga. galv. sheeting.
> 
> 6. The over arm is not a normal design. Mine slides on a track using
> 8 boogie wheels and
> two pieces of Unistrut as guides. The motor, 1750 rpm, is connected
> to a 900:1 gear box.
> 
> 7. The table is wired with multiple outlets (4) so I can unplug all
> of the motors.
> 
>      I guess that's about it Tyrone. I hope I've given you what you
> were asking for and
> enough info to excite you to attempt your own machine project. Good
> luck. I'll post to the
> list after I've turned the main switch and started grinding Tyrone.
> 
> --
> Joe & the four furry paws of Jenny, the wonder dog,
>        in the Aurora filled skies of northwestern Vermont.
>                Swanton - The Maple Syrup capitol of the WORLD...
> 
> 
> 


=====
Joseph Goins
1091 Harness Cir #1
San Ramon, CA
(925) 277-1351

http://www.geocities.com/jb_goins/

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