Re: Gecko 320 with external encoder power supply

Andre, good afternoon and Happy New Year! From the look of things
what you have there is a differential output encoder. The biggest
problem with it might be the power consumtion.

Find a 5VDC power supply and a multimeter. Set the multimeter to "DC
Amps". Connect the black lead to the encoder "+5V" wire, connect the
red lead to your power supply +5VDC output. Take the encoder ground
wire (black) to your power supply "minus" output. Turn on your 5V
power supply and read the multimeter. If the current is 0.05A (50mA)
or less, you are in luck. If it is more than 50mA, you have to use an
external 5V supply.

Take a look at "REMOTE ENCODER.pdf" in the files section of this
group. The circuit shows how to have the PC power 1 or more encoders
and you can use them as DRO as well. Change the 470 ohm resistors to
120 ohm though.

For your encoder:

A+ to PHASE A
A- ignore
B+ to PHASE B
B- ignore
Z+ ignore
Z- ignore
+5v to either ENC+ or PC +5VDC (depending on the multimeter results)
Common to either ENC- or PC ground (ditto)
Shield to chassis ground

Mariss

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "andrebarclay"
<andre.barclay@v...> wrote:

> Happy New Year to all,
>
> I would be a lot happier if I could hook up these damn servos to my
> gecko 320s.
> I talked to Mariss @ Gecko and in his usual fashion explained
> everything thoroughly but I must have written something down wrong

so

> now I'm stuck and too chicken to waist more of his time (he really

is

> patient with boneheads like me.)
>
> I did gather that I needed a separate power supply for each of the
> encoders since they draw more current then the geckos can supply.
>
> Here is what I have. My encoders have 8 wires with the following
> functions:
>
> Orange CH A+ This goes to Phase A on the

drive

> Green CH A- Where does this go?
> Yellow CH B+ This goes to Phase B on the

drive

> Blue CH B- Where does this go?
> Brown CH Z+ I understand that this is not used.
> Grey CH Z- I understand that this is not used.
> Red CH +5v +5v from my power supply goes

directly to this.

> Black Common Where does this go?
> Shield Drain Where is the best place to

drain this to?

>
> Hope someone can help!!
>
> Thanks,
>
> Andre Barclay