Bill Noble wrote:
"Terry Coombs" wrote in message
...
I picked up a treadmill today , for free - well , OK , I got a
couple gallons of gas invested . I know it's probably overkill from
a power standpoint , but has anyone used one of these drive motors
to power an X-axis powerfeed ? Variable speed , and reversible with
some switching hardware . Got other features too , none of which
I'll be needing . Who cares what my heartbeat is while I'm milling a
slot in a chunk of aluminum ?
--


the motor will work, but you will want to gear it down quite a bit -
100 to 1 or 200 to 1 seems about right - I'd encourage a worm gear
for this application. And you will need to protect it from chips by
fully enclosing it, and then you will need to add a muffin fan for
cooling (with a filter to keep chips out). Beware also that it is a
DC motor and so it will have significant stall current - I presume
this is a PM motor, not a motor with a separate field coil. Also,
these are commonly "rated" at 2 HP, but in reality they are closer to
a real 1/4 HP or less motor, if you try and run them anywhere near 2
hp for very long, they will not be at all happy. They are good for
wood lathes, where the load is not continuous, but I'd be careful for
a power feed.
Thanks , y'all ! I was planning on reduction with a belt/pulley , but I can
see that might not be enough . First step will be to see what RPM it turns ,
and if there's reduction built in .
The motor might end up powering my little drill press if I can't figger a
way to adapt it for the mill .
Might end up still powering the treadmill , AFAIK that part isn't broke ,
just the incline motor system . If that can be repaired easily , I might be
able to get some cash outta this thing .
Cash is good ...
--
Snag
sometimes ya gotta
shovel manure
to pay the bills