Gang, I appreciate all the attention! Interesting comments.
nbucska - one per installation if a polar drive (the seasonal drive only moves 1/8 degree per day, possibly with a linear actuator - or two for an az-el drive. But the az-el drives have an even wider speed range requirement, going...
Thank you, nbucska. You expect that stepper motors and controllers will beat 3 phase ac motors controlled in "bang-bang" fashion on cost? I sure have reliability concerns about the bang-bang approach!
blaksea, itsmoked:
I'm not familiar with how to specify a smoothness parameter - but you're...
Output operating speed is 15°/hr, so I think I'm looking at lots of gear reduction anyway, so input speed best chosen by motor/controller type?. Output load is 200 to 1750 Nm, so less than 200W. Positional feedback or encoder. Life 20 years or 70,000 operating hours. Low cost relative to the...
What's the best choice for a motor with a wide speed range requirement? This application will spend 99% of it's operating life at low speed and 1% at 130x. Other desired features are feedback, high reliability, long life, and low cost in high volumes (> 10k/yr).
Thanks!
