Re: where's the torque ?

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Leslie Watts" <leswatts@a...>
wrote:

> Unlike leadscrews I think rack and timing belt drive will need
> a lot of motor reduction. I think Erie's figures are pretty
> close to the mark. I'll do a run on Motioneering and see
> how it looks.
>
> Les

I can see that a 5 TPI leadscrew is the same as a 1.25" spur gear and
a 20:1 gear reduction.

The spur gear moves the table 4 inches per revolution so the motor
need a 20:1 reduction to allow the motor to move 5 rev's per inch.

Of course the cutting forces are much different to the amount of force
is different.

A question I'm going to have is one of 'is there any way to use the
table to determine developed force'?

I'm thinking that if one were to rapid at 150 ipm, then take a cut in
some pine to see the amperage change, then repeat in oak, then maybe
aluminum... one could create some empirical data on actual power.

Dave