Re: [CAD_CAM_EDM_DRO] Re: Trak cnc 2 control replacement

On Wed, 14 Jan 2004 00:30:01 -0000, you wrote:

>--- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@p...> wrote:
>>
>>
>> seb fontana wrote:
>>
>> > Jon
>> > OK, we be making progress! I don't have to use both,
>just the one thats recomended to work with what ever control/software
>I end up getting..Probably the ones on motors as thats the talk seems
>to be about...I can power it, so how do I check which wire does what?
>The black and white wires I think [oh no!]are power cause where they
>attached is sepparate from the other 4; the orange, red, green and
>purple wires..So, how to check for sure? Seb.

One clue is that if you very gently remove the bell housing on the
encoder, you might see some silk screening on the circuit board. You
can look for such illustrative things as +5 and gnd. Another thing to
do is that IF you recognize the IC, you can make some resistance
readings from the power and ground pins to the wires you think are
power leads... You do run a bit of risk in this, perhaps not too much.
I'd start with a high ohms scale and move down. Do make sure that
your ohmmeter is not putting more than 5 volts across the leads,
though. Again, this is risky.

Another option would be to check the size of the traces, 5 volts and
ground are generally heavier. Look for any bypass capacitors that
have a ground on them, they are most likely connected across the
supply leads. Certainly, you should be able to identify ground.

On the Minertia motors I have, the wires were identified as +5 and
gnd.

Harvey

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