Re: [CAD_CAM_EDM_DRO] Re: odd yet consistant problem

I appreciate all the help I get here..I am aggravated that the documentation that comes with all these components have been lame..I have 20 years background in restoration of electronic circuits..Hobby has long been restoring antique radios and obsolete laboratory grade electronic test equipment..I am not competant working with integrated circuits but I am capable of following directions and willing to read long and comprehensive documentation..I looked forward to doing this mill upgrade but time and again I have had problems that should not have happened ..I found my problem , I had cranked the current limiter variable resistor on each of the drives full clockwise..Adjustment of that resistor was covered in one short paragraph in the instructions.I had interpreted it to mean that full current would be made available for the servo motor if turned full clockwise..Given that I am using the motherboard with those drives and when those drives are fastened down to the heatsink using the motherboard you cant physically get to that resistor to change adjustment-- I cranked them each in direction I understood would give me full power..I was wrong.
Steven

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The Rutex (at least the ones I have) do not appear to have thermal
shutdown. If they did, it would probably come after extended
operation of the drives under heavy load conditions. You would
probably not be able to comfortably touch the unit (too hot). Nor do
they have an intergal overvoltage shutdown.

I suspect that you are spiking past the current rating. Which drive
model do you have? What size motors. Have you monitored the DC
voltage as you do these jogs. I have some of the older R90 series
Rutex and a R996 I have been using for over a year on my plasma
cutter. They will definitely fault if you put the motor in a bind.
Motor current goes up dramatically if there is excess binding or
friction. give me the Rutex model numbers and some info (whatever you
have) on the motors and lets see what we can figure out.

Now is a good time to own a scope and current probe! Since a sudden
spike of current will shut the drives down it will be hard to catch
with simple meters.







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