Check this video regarding the fan
http://www.youtube.com/watch?v=W7d2842ZQBk
Regards,
Andrew in Melbourne
On Mon, 2011-11-07 at 14:44 +0000, Chris wrote:
>
> I recently put a belt drive conversion on my X2 as well and ever since
> then it has run really hot. The pulleys that I made were based on the
> HossMachine.info conversion and if I let it run at full speed on the
> high speed pulley the spindle head of the mill will get up to 130
> degrees and the motor will get up to 120. That can't be good for it.
> Before the belt conversion I would consistently run the mill at full
> speed and I don't ever remember the motor getting hot like that.
>
> Does anyone know if there are any better upgrade bearings I can put in
> the spindle head and motor so that I can use the 6000rpm capability of
> the belt drive without the head getting that hot?
>
> I thought about taking out the bearings, cleaning, and repacking them,
> but they appear to be sealed bearings. Something else that I noticed
> is that after the belt conversion the motor doesn't seem to draw in as
> much air as it used to, which I think is the main contributor to the
> heat issue. When I put the smaller of the two pulleys that I made on
> the motor it runs cooler, most likely because there is more room
> around the pulley for air to be pulled into the motor. It got me to
> wondering if it would be possible to make another pulley with a series
> of holes drilled through it, that would help draw air and force it
> into the motor.
>
> Chris
>
> > Jeff, an old "Bull of the Woods" machinist pointed this out to me
> years
> > back. He would walk through the shop and lightly touch each motor
> on
> > machines in use. If he could leave his hand on the motor then it was
> not
> > working hard and neither was the machinist! Motors are (were) rated
> to
> > run at 30 degrees above ambient. In a 68 degree shop that's a warm
> 98
> > degrees and in a 90 degree shop (like I recall!) that's 120 and
> quite
> > warm to the touch!
> > So if you are working your little motor hard then it should be warm
> to
> > the touch. A non contacting thermometer (~$20 at HF) will tell you
> > exactly how hot your motor is and also where the heat/cool is going
> in
> > your house too!
> > With luck there is a nameplate on your motor that will give the
> power
> > rating in watts and the temperature rise above ambient! Bill
> >
>
>
>
>
>
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