CapinWinky
Member
I have a very low cost application (so, no standard servo in the budget) with essentially a star wheel that need to index one position at a time. It does this by detecting a product entering the star wheel to turn on the VFD, and detects the star wheel reaching the new position with a prox to turn off the VFD. This works up to a certain rotation speed, after which, our motor/drive combo can't stop in a repeatable way.
We are currently using a pretty low end Asynchronous motor with a gear box and a medium end drive with jerk turned off and DC injection turned way up.
Stepper doesn't seem like a viable solution for hard accel/decel applications. I'm wondering if keeping the VFD and using a Synchronous motor instead of an induction motor would improve start/stop performance. I'm not sure why we are using a gearbox, but we don't need that much torque. It may be improving stop repeatability by dividing the motor shaft position error, but I'm wondering if removing it will improve things for us.
Ideas?
We are currently using a pretty low end Asynchronous motor with a gear box and a medium end drive with jerk turned off and DC injection turned way up.
Stepper doesn't seem like a viable solution for hard accel/decel applications. I'm wondering if keeping the VFD and using a Synchronous motor instead of an induction motor would improve start/stop performance. I'm not sure why we are using a gearbox, but we don't need that much torque. It may be improving stop repeatability by dividing the motor shaft position error, but I'm wondering if removing it will improve things for us.
Ideas?