Re: [CAD_CAM_EDM_DRO] acceleration profille

Hi Michael,

A linear acceleration or deceleration might be easier to do, but not the
best. You might take a look at a manual for the CY545 stepper
controller from Cybernetic Microsystems.

http://controlchips.com

Look at the rate tables, and the plots of acceleration/deceleration.
There's also some useful information on steppers in the manual.

I use a similar table in my controller program to do
acceleration/deceleration. An acceleration term determines how fast the
controller program runs up/down the table.

Don't know what you mean by "skipping a step" at almost full speed. The
time between steps simply changes.

Alan KM6VV


Michael Holm wrote:

>
> I also made a stepper controlling software. This one runs under windows, and
> does linar acceleration.
>
> I did some thinking on that, and was about to make a user-editable
> acceleration curve, because I was in doubt if it should be linar.But if you
> think hard about it, it makes no sense to make it curved curve, as that
> would mean that you'd have to skip just one step at some point, when running
> almost full speed, and that have to be even harder then starting at full
> speed.
>
> So it has to be linar interpolated.
>
> Draw a curved acceleration curve on a piece of squared paper (using only
> full squares, representing one step) and you'll understand what I mean.
>
> --Michael