Originally Posted by
WYLD
One more thing...I would prefer a list of pros and cons for:
DC servos
AC servos
gear-reductions
In between there is BLDC which is Brushless DC, which can be configured, mix and match drives, almost as easily as DC Brushed and has some of the advantages of AC Sinusoidal etc.
Gearing allows the economic sizing of motors and drives, which to a great degree is governed by your top expected rapid/feed rate, i.e. if you have a servo which is rated up to 6000rpm the you can generally afford quite a bit of reduction as without the reduction, you may never come close to using the max rpm of the motor, one principle sizing issue is inertia ratio between motor and load, and this is determined by your accel/decel rate( target inertia ratio <10:1).
One advantage is that reduction gearing reduces the inertia ratio by the square of the reduction.
I would suggest downloading one of the free sizing programs from any servo manufacturer like Kollmorgen etc.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.