The resistor is reducing the voltage and hence the speed of the motor,
preventing a 5000 RPM motor from spinning at over 10000 RPM leading to
bearing, commutation, brush and possible winding (excess centrifugal force)
problems. Yes, I can run the motor at 24V and 50% duty cycle and do the same
thing but there may be other issues.

Using 10 rectifier diodes in series I see only a .8V variation at the motor
(13.6V - 14.4V) with the PS at 23V and under the same load conditions
mentioned earlier. Yes, I'll need 20 for both directions but they're cheap.
Bottom line....G320 and 12V motor should be feasible one way or another at
24V. Just waiting on Gecko's take on it and still looking for a 12V
compatible drive.

"Ned Simmons" wrote in message
...
In article 5Qfzd.8273$113.6842@trndny03, says...
More than sufficient for the application. With the PS adjusted to 23V and
with a 8 ohm series resistor the voltage fluctuates between 13 and 16V at
the motor indicating a maximum current draw of just over 1A. And this
included loading the table with a 25lb weight (about 25 times what I'll
be
using), stopping and starting etc..


The resistor isn't doing anything useful and may actually degrade the
performance of the system. As suggested earlier, you'd do better to
limit the motor's speed in software.

Ned Simmons