Re: Calculating stepper power

> >Typical motion stroke... 0.020"
> >Typical duration of action ...8 hours
>

.
<snip>
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> The stroke is .020" ? That's only 1/10th of a turn of the

ballscrew!

> 1/5th of
> a turn of the motor = 40 full steps. Hmmm, not a lot of time for
> acceleration-
> constant vel-deceleration ramps. Worst case is 20 steps

accelerating,

> 20 steps
> decel. So, you have to go from zero speed to 20 IPM in 20 steps,

or from

> zero to 667 steps/second in 3 milliseconds. I'm not sure this is a

good

> application for a stepper motor! I think maybe you should start

looking at

> servo systems.
>
> Jon

Do I read this that one stroke will have a duraton of 8 hours ?
Or is this like a driller that will be punching holes continously for
8 hours ?

With the short stroke, the thing that comes to my mind is a lever and
piston.

With a lever and piston, the movement can be fast, and the short
stroke is less than 90 degrees. I use a 90 deg stroke on a part
clamp with a pnuematic actuator.

Dave