Re: [CAD_CAM_EDM_DRO] Dedicated mb for PID

Doug Harrison wrote:

> The current methods of converting S/D pulses to servo control use analog
> tuning of the PID (or PD) loop. Gecko 320/340 amps do this quite well.
> Rutex has a board that will convert S/D to +/-10V for use with most other
> servo amps.
>
> Suppose a person wanted to do the PID in software. A dedicated PC
> motherboard could be used to read S/D pulses from the control computer and
> compare this to encoder position via a camtronics card. Servo output would
> be through an analog output card, also in the dedicated MB next to the
> camtronics card. Software for the PID MB would reside on a Sandisk
> Flashdrive.
>
> Assuming the motherboard was free, this arrangement would cost about $250
> which is less than four Rutex boards (one per axis). It would also allow
> one to vary the permissable following error.

You could also do this in one FPGA, probably for $30.

Jon