Re: [CAD_CAM_EDM_DRO] On LED's and Gecko Tunings

Abby,

I assume you are talking about Gecko 320's. I wired my drives to the motors and C-clamped all three motors to the bench for testing. The first tests were horrible due to the encoder cables cross-talking but after correcting this by seperating the motor leads from the encoder cables the motors smoothened right out. I adjusted the pots in this manner. It probably isn't right but it worked. I turned down the gain and turned it up little by little until the motors got jerky, then I backed the gain off until they smoothened out reliably and left it there. And they work fine. The dampening pot didnt seem to make much difference where it was. These are 40lb/in. (about 4 N/m) servos rated @ 2 hp and 2500 rpm so they were definitely clamped down and not attached to the lead screw for tuning. They will break things.

Ron

AbbyKatt <cnc@...> wrote:
Two quick, and perhaps silly questions:

Will a 6K resistor be enough with my 50-60V power supply, to light an
LED and not fry it?
I'd like to have a neat light telling me if my power-supply is on, and
the old external HD case I'm using already has one built in... So..

R=V/I
R=(60/0.01)=6K?

Goodmath? Wrongmath?

.. And.. Which is better, tuning gecko-drives with the motor attached,
or not attached to the leadscrew (ie. Bench or field?) I mean, attached
it might break something if it starts violently oscillating, but then,
wouldn't it be better if you adjusted it when it was actually moving the
table? Or is a combo of both best? Your experience, please!

OkayThanks!
~Abby




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