Re: [CAD_CAM_EDM_DRO] formula ?

docholliday01201 wrote:

> once again, who knows the formula for converting rotational torque at
> the motor-to linear force at the table ??

Its really simple. Consider the leadscrew to be a drum pulling a string,
where the circumference of the drum is equal to the lead of the screw.
If you have a 5 TPI screw, that is the equivalent of a drum with circumference
of .200 in, or .0637" diameter or .0318" radius. If the motor produces 10 In-Lb,
that is the same as 10 Lbs pull at a radius of one inch. This will translate
to 10 / .0318 = 314.16 Lbs linear force on the table! Pretty amazing, these
ball screws!

Jon