Questions - 90V/120V motor ok?

alex wrote:

>
> Thank you,
> the first think comes in mind is a treadmill motor.
> But isn't rated RPM ( over 3000 at 90V) to high for a servo application?
> Should I use a reducer in this case?
> Or it will be OK as is?
> Alex

Thats a perfect motor to use, in conjunction with 80V Geckos
(and I also presume 80V Rutex drives). 'Standard' DC motors
come in 12V, 24V, 36V, 90V, 120V, 180V varieties. Using a 36V motor
you give up too much (you have to use a 36V supply), but 180V
you are limited to 80/180 of the performance, due to the 80V
max rating of the Gecko/Rutex drives.

So a 90V motor is fine (I think the treadmill motor is 120V, and
thats still OK).

For a 90V motor, the max speed will be limited to approx
80/90 * max rpm (or 75/90* max rpm if using our 75VDC power
supply kit, which gives a 5V safety margin for the 80V max drives).

As for a reducer (gearbox or timing belt pulleys), figure out
what max table speed you want, and calculate a pulley ratio
to match (this usually means you will also get a torque multiplication
from the motor, which is good).

regards
Doug Fortune
http://www.cncKITS.com















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