Re: Need help with Dyno design

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Steve Stallings"
<stevesng@n...> wrote:

>
> Doing a dyno with a moving mass gets tricky because
> it takes some of the torque to accelerate the mass.
> You will need enough range of motion to reach the
> steady state speed without the stepper motor jumping
> steps while accelerating or possibly use a linear
> acceleration and calculate the additional torque
> consumed in the acceleration.
>
> Regards,
> Steve Stallings
>

Understand, but if we are home-testing aren't we testing for a
machine that will have to move the mass anyway ?

I found that on my machine I could run my steppers verrrry slow to
get past a dirty screw on a project. cleaned up the junk and I'm
back up to speed.

But, since many tests are to see where the motor starts to miss
steppps, this would be a simple home-brew way.

For most settings, it is only an inch or so for the ramp to be
complete.

Dave