HuFlungDung
Diamond
- Joined
- Jan 19, 2005
- Location
- Canada
I'm trying to find an accurate estimation of what size of an electric motor is required to accelerate a multi-spindle drilling machine.
There are 30 gear driven spindles, each one has a tentative rotating mass of about 1.75 pounds. When the machine runs, it will have an idle speed of about 1000 rpm, then accelerate as quickly as possible to 3000 rpm, drill for a duration of about 2 seconds, decelerate to 1000 rpm for about 4 seconds, and repeat this same cycle continuously for many hours.
Suppose I wanted to accelerate these at a rate of 2000 rpm/sec^2, how large of a motor would be required to provide sufficient torque? In this situation, the actual torque required to do the drilling is small, I would think less than the acceleration torque requirement.
Of course, a VFD will be involved in the speed change. The ratio between the main motor and the spindles will be 1:1
I hate to just guess at it, and end up having to change out some expensive components, plus potentially have to redesign due to physical size requirements.
At this stage, I might also be able to figure out ways to lighten the spindle assemblies to shave off ounces here and there.
Thanks for any assistance.
There are 30 gear driven spindles, each one has a tentative rotating mass of about 1.75 pounds. When the machine runs, it will have an idle speed of about 1000 rpm, then accelerate as quickly as possible to 3000 rpm, drill for a duration of about 2 seconds, decelerate to 1000 rpm for about 4 seconds, and repeat this same cycle continuously for many hours.
Suppose I wanted to accelerate these at a rate of 2000 rpm/sec^2, how large of a motor would be required to provide sufficient torque? In this situation, the actual torque required to do the drilling is small, I would think less than the acceleration torque requirement.
Of course, a VFD will be involved in the speed change. The ratio between the main motor and the spindles will be 1:1
I hate to just guess at it, and end up having to change out some expensive components, plus potentially have to redesign due to physical size requirements.
At this stage, I might also be able to figure out ways to lighten the spindle assemblies to shave off ounces here and there.
Thanks for any assistance.