Re: [CAD_CAM_EDM_DRO] Re: Re: PIC-Servo

>Well, I've been doing it for several years. Maybe you'd better define your
>budget for us. For servos, you need not only motors but encoders. Careful
>searching of surplus sources can usually find encoders at a reasonable
>price.
>There are usually a few on eBay at any time.
>
>You need an encoder counter per axis so the computer can read the position,
>and you need servo amps and a way to command them. The old way was through
>+/- 10 V velocity command signals, so you need a DAC per axis to send those
>signals to the servo amps.
>
>Velocity servo amps need a way to sense axis velocity. The old way was
>through
>a DC tachometer, but many newer amps can use encoder signals.
>
>Copley controls has some fairly inexpensive servo amps in a range of sizes,
>but they are about twice as expensive as a Gecko drive, ie. around $200 ea.
>
>I've got all the rest of it in a 3 board set, see <
>http://pico-systems.com/PPMC.html >
>for more info.
>
>Jon
>
>

Hi jon,

Well I have $250 invested in pic servo products. I have designed my own
power supplies, amps, and encoder connections on top of that. So I would
trash my pic servos, (or use them on a lathe with spindle encoder feedback
for threading - I am always looking for a new project!) if I could pick up
your set of boards for 250 - 300. But I dont think thats going to happen.


thanks,
andrew-kn6za

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