I know the subject doesn't say it all. I would like to compare some DC servo motors without having to mount them each on the machine. I have figured out how to apply an equal load, measure rpm, measure voltage and amperage. Because of the difference in the motor shafts and mounts it is easier to measure these off the machine. So if the motors are tested at a lower than normal voltage and amperage do the results scale up easily? Thanks, Eric R Snow
Are DC servo motors linear?
Mar 08, 2005
2 Replies
If you use the motors within their ratings, they are linear for most purposes, neglecting the stationary friction and brush friction. So if your standalone measurements are done at sufficient speed to dwarf those effects, they will scale without any great surprises.
As for "scale up easily", I presume you can use a calculator if your arithmetic skills are not sufficient to easily perform multiplication.
--Larry Brasfield
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Thanks for the reply Larry. I think I remember enough math. I can still make change calculations than the checkers at the store. But that's not saying much... Eric
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