Re: [CAD_CAM_EDM_DRO] Bridget

Hi Tim,

how about passing the A&B channels of the 200 line encoder thru
flip-flops to devide by 2 and 'simulate' a 100 line encoder

maybe add some data selector logic for a dual speed setup?

Brian

On Sunday 24 June 2001 09:58, you wrote:
> > -----Original Message-----
> > Hello Tim.
> > Sad but isn't it better to get a higher resolution again for the
> > encoder?
>
> With the Gecko servo drives you have to remember you are driving them in
> step mode so that it is important to not get the resolution so high the
> software can not output the required pulse rate. With the 1000 line encode
> it would take 4000 steps per motor revolution. I am putting this on the Z
> axis which takes 20 motor turns per inch. So with the original encoder it
> would have taken 80000 steps per inch. I am hoping for 60 IPM which means I
> would have needed 80000 steps per second. A little tough for most of the
> step and direction software to handle. Movement per step would work out to
> .0000125 which sounds great for the ego, but is just not realistic. I will
> probably go with a 200 line encoder I have on hand for 16000 steps per inch
> requiring only 16000 steps per second at my target speed and giving a step
> dimension of .0000625 which is plenty. I would actually like to use a 100
> line encoder but figure I should use what I have instead of spending
> another $80 or so to get one from US Digital.
>
> Tim
> [Denver, CO]