Re: CAD_CAM_EDM_DRO spindle to motor connection

Ivan,

What size mill?

There were a few machines that used flat belts (nowadays they'd be
urethane, or some such). One pulley of the spindle motor pair has a
width which just accomodates the belt, with flanges on both ends. It
will also have a heavy crown in the center,which serves to keep the
belt centered on IT. The other is a straight right cylinder, of a
diameter to effect the desired ratio betweeen the two; and long
enough to accomodate the desired spindle travel.

In use, the belt "follows" along with the narrower pulley as it moves
up and down the longer right cylinder pulley. Which on the motor, and
which on the spindle? I've seen them done both ways, and can't think
right now of any definitive reasons for choosing one over the other,
that you won't encounter as you start to plug this into your needed
sizes, speeds, torques, etc.

In other words, the TLAR approach will prob'ly tell you which pulley
should be where...

Hope this helps,

Ballendo

P.S. TLAR? That Looks About Right.

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Ivan Nichols <ouisel@v...>"
<ouisel@v...> wrote:

> Does anyone have suggestions on how to connect a motor to mill
> spindle so the motor doesn't run up and down with the spindle -
> without having to cut internal splines? Most of the designs I've

been

> seeing show the motor traveling with the head - I want to mount the
> motor separately to reduce the mass on the head.
>
> Thanks in advance.
> Ivan