[chicof]

Hi,

I'm trying to understand the motor linearity and what it does to the performace of a stepper motor. Does it has to do with the internal mechanical dimensions of a determined motor?

I need couple of motors with 800-900 oz/in of holding torque and so far here are the options I have come up with:

- PK299-F4.5a from Oriental Motors (8 lead). I have seen many threads mentioning this motor and it's impressive performance.

http://catalog.orientalmotor.com/ite...=prod&filter=0

- KL34H295-43-8B (8 lead) from Keling, these are chinese motors, but, apparently have impressed some important people (Mariss from Geckodrives) with it's performance.

http://www.kelinginc.net/KL34H295-43-8B.pdf


Any thoughts or comparisons very appreciated
Francis

[chicof]

STFW means: Search the fu#!%! web !!


I found nice stuff about motor linearity, it's really worth the reading. It is an important characteristic of a motor when running it at very low speeds!
It explains why big stepper motors resonate loudly at low speeds.

http://sanyo-denki-online.com/library/accuracy.pdf

http://www.mechmate.com/forums/archi...php/t-255.html


Could anybody help with the 2 motors mentioned before and it's linearity characteristics?

Thanks,
Francis