Son of Servo questions.

Thanks to all those who responded. just a few more questions if you please.


What is the difference between a Hall sensor, a "Tachsyn" (I'm assuming a tachometer yes?), and a frameless resolver type of primary feedback?


I notice that stepper motors are usually size classified in NEMA sizes but i rarely see references to these sizes when looking for servos. does that make servo frame sizing more proprietary?


I've seen servos that have a torque rating in torque per amp. then give a demagnetization amperage. is that the peak torque for this motor? and likewise is it safe to figure that the holding torque (is holding the right word?) is 1/10th that figure?

If I plan on using a .5"/rev ball screw, a 500 count/rev encoder will give me a resolution of only .001" per pulse, yes? likewise if I want my accuracy and repeatability to be as close to .001" as I can afford, a higher encoder resolution would be preferable? Say 1000 count or higher (all other things being equal)?


lastly: If I lead an armed movement to standardize and consolidate the specs for these things will any of you support me?

thanks

peter



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