Re: 555 timer circuit

Hi Bill,

I think Mariss' circuit will be generating a trapezoidal accel/decel
curve. the accel/decel would only be as long as necessary, and the
motor would "slew" between accel/decel legs.

Alan KM6VV

Bill Griffin wrote:

>
> > 2) Medium. Same as above but generates an accelerating step pulse
> > train of your choice of accel rate and terminal velocity. Releasing
> > the switch then decels at same rate until motor stops. 2 to 3
> generic
> > ICs and of course some R's and C's.
> >
> > I can post it to the files section after I convert paper/pencil
> stuff
> > to a .pdf if anyone wants.
> >
> > Mariss
>
> Mariss
>
> Might be better for machine control for decel to occur at a pre
> dertemined (user settable) rate instead of using the same accell
> ramp. This way when moving an axis 12 inches in dosent take another
> 12 inches to decel.
>
> Bill Griffin