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General Metalworking - All aspects of working with metal.
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Posted by Dave, I can't do that on May 10, 2008, 2:44 pm
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Hi,
The motor on my HF 4 x 36 belt sander went belly up after only about 6
or 8 years. Sheesh. I contacted HF for a new one and it is going to be
40-bucks plus shipping and 12 to 15 week wait. <sigh>
I was scrounging around under the benches and found one of the
Treadmill motors and controllers that Surplus Center used to sell.
Problem is I have a bunch of wires hanging out of the motor and no
idea who goes where.
I checked the dropbox and there is a schematic for the controller but
nothing for the wires to the motor.
Can anyone please help me with how to wire this up.
Thanks guys.
Dave
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Posted by William Noble on May 10, 2008, 3:20 pm
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"bunch of wires"??? how many? does the motor have brushes? does it have a
magnet?
harbor freight motor went "belly up" - symptoms? usually it's a capacitor
or dust making the start switch inop - did you check these things? it is
much easier to fix than replace
> Hi,
>
> The motor on my HF 4 x 36 belt sander went belly up after only about 6
> or 8 years. Sheesh. I contacted HF for a new one and it is going to be
> 40-bucks plus shipping and 12 to 15 week wait. <sigh>
>
> I was scrounging around under the benches and found one of the
> Treadmill motors and controllers that Surplus Center used to sell.
>
> Problem is I have a bunch of wires hanging out of the motor and no
> idea who goes where.
>
> I checked the dropbox and there is a schematic for the controller but
> nothing for the wires to the motor.
>
> Can anyone please help me with how to wire this up.
>
> Thanks guys.
>
> Dave
** Posted from http://www.teranews.com **
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Posted by Dave on May 10, 2008, 6:39 pm
Please log in for more thread options Hi William,
Yup, I checked and it is not actually the motor. Being an older one it
did not have a start-cap but a delay relay in conjunction with the
switch. It is the switch and relay that have burned up. The motor still
runs but in any direction it feels like it. Not good for a sander. <grin>
HF don't have the switch and relay either as they have no manual and I
have no manual and thus no part number for it.
I can't just add a cap to the motor as there is no centrifugal switch.
OK, the wires are not quit th bunch I thought. After cutting some cable
ties it turns out I have...
Black and Yellow going to the field windings.
Blue and Brown going to the tach windings
Each of the brushes have spade terminals on them and no wires as yet.
Dave
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Posted by BillM on May 11, 2008, 10:49 am
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> HF don't have the switch and relay either as
> they have no manual and I have no manual and
> thus no part number for it.
>
> I can't just add a cap to the motor as there
> is no centrifugal switch.
Well---yes you can. I've got an OLD chinese
bench grinder with a totally
fragged centrifugal switch. Wired in a
momentary on pushbutton switch
in place of the centrifugal. Flip toggle/push
button, wait a couple of seconds
for it to come to speed, release button. Easier
to do than describe, and
it's worked just fine for about 8 years.
Bill
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Posted by John Husvar on May 11, 2008, 11:06 am
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>
> Black and Yellow going to the field windings.
> Blue and Brown going to the tach windings
> Each of the brushes have spade terminals on them and no wires as yet.
Which would tell me one can wire it either series or shunt field.
Series provides the greatest torque. The more you load it the more
current it draws until it burns up. Connect one field wire to one brush
and line leads to the other brush and other field wire. Tach leads to a
tach circuit that'll suit or leave open.
The way you describe it, it was probably shunt wired. Shunt connected
provides better speed control and easier possibility of dynamic braking.
Reduce armature current and increase field current to brake. Connect the
field wires to the appropriate terminals on a drive. Same with the
brushes. Tach wires to appropriate terminals. Use a field-loss relay!
GA,AMWIST. :)
Tach windings can be used, and probably were, to control speed under
varying load conditions.
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>
> The motor on my HF 4 x 36 belt sander went belly up after only about 6
> or 8 years. Sheesh. I contacted HF for a new one and it is going to be
> 40-bucks plus shipping and 12 to 15 week wait. <sigh>
>
> I was scrounging around under the benches and found one of the
> Treadmill motors and controllers that Surplus Center used to sell.
>
> Problem is I have a bunch of wires hanging out of the motor and no
> idea who goes where.
>
> I checked the dropbox and there is a schematic for the controller but
> nothing for the wires to the motor.
>
> Can anyone please help me with how to wire this up.
>
> Thanks guys.
>
> Dave