Re: DRO function when using gekos in manual mode

Hi Mariss,

Yes please!

Alan KM6VV

Mariss Freimanis wrote:

>
> You can use the encoder as a DRO if you don't mind wiring a little
> circuitry. The DRO will read the position while it is servo
> controlled, or if you reset the G320 (motor free-wheels), you can
> read position while hand cranking the machine. Here's how to do it:
>
> 1) Power the encoder from your PC +5VDC supply (available on GAME
> PORT pin 1). Take the encoder CHANNEL A and CHANNEL B outputs to
> where ever they have to go on your PC for the DRO function.
>
> 2) Get a dual-channel opto-isolator. Take the opto collectors to the
> G320 PHASE A and PHASE B inputs. Take both opto emitters to the G320
> ENC- input.
>
> 3) Put 180 ohm resistors in series with the opto LEDs. Take the LED
> cathodes to the encoder CHANNEL A and CHANNEL B outputs. Take both
> opto LED anodes to your PC +5VDC.
>
> 4) Place a 470 ohm resistor across the G320 ENC- and ENC+ terminals.
>
> Now both the PC and the G320 can use the encoder. This also gets
> around the 50mA maximum encoder supply current limit of the G320 so
> higher supply current encoders can be used.
>
> If there is interest, I will draw up and post a circuit diagram of
> this to the group.
>
> Mariss