[Don_Karlos]

Hi,
I'm working on a vibration Table for my Epoxy Concrete Production. I want to turn 2 Shafts with Counter weights in the same Speed and Position (one CW and one CCV) to get Vibration. Is it possible to do that with 2 AASD China AC Servo Drives (I have some in the shelf)? If anybody has done it, I would appreciate your advice! Since the Motors are not mechanically connected, would it be possible to use only one Encoder for both Drives?
Many Thanks in Advance
Karl

[mactec54]

Hi,
I'm working on a vibration Table for my Epoxy Concrete Production. I want to turn 2 Shafts with Counter weights in the same Speed and Position (one CW and one CCV) to get Vibration. Is it possible to do that with 2 AASD China AC Servo Drives (I have some in the shelf)? If anybody has done it, I would appreciate your advice! Since the Motors are not mechanically connected, would it be possible to use only one Encoder for both Drives?
Many Thanks in Advance
Karl

No you could not use (1) Encoder for (2) drives why not just control them with a Pot 0-10v you can change each to the same speed may be able to use the same control Pot for the (2) drives

[Don_Karlos]

No you could not use (1) Encoder for (2) drives why not just control them with a Pot 0-10v you can change each to the same speed may be able to use the same control Pot for the (2) drives

Hi,
thanks for your quick reply. Since a Vibration Table needs absolute sync of the counter weights (otherwise you would get an oscillating vibration amplitude from 0 to max and to 0 depending on the rpm difference) I think that some kind of "electronic shaft" is needed. Why can't the second servo just be synced by using the Encoder Signal from the " Master" Motor? How should the second Motor know, that it is not it's own Encoder signal?
BG
Karl

[mactec54]

Hi,
thanks for your quick reply. Since a Vibration Table needs absolute sync of the counter weights (otherwise you would get an oscillating vibration amplitude from 0 to max and to 0 depending on the rpm difference) I think that some kind of "electronic shaft" is needed. Why can't the second servo just be synced by using the Encoder Signal from the " Master" Motor? How should the second Motor know, that it is not it's own Encoder signal?
BG
Karl

There are many ways the 2 motors could be synced, depending on how you want to control it, it could be as simple as using Mach3 CNC software and have a master and slave axis, or by using a PLC you don't need to do anything with the encoder to have them in sync, just a simple Step/Dir control you can sync the 2 Drives

Not sure why you would be needed 2 motors to start with, you could use a belt drive

[Don_Karlos]

There are many ways the 2 motors could be synced, depending on how you want to control it, it could be as simple as using Mach3 CNC software and have a master and slave axis, or by using a PLC you don't need to do anything with the encoder to have them in sync, just a simple Step/Dir control you can sync the 2 Drives

Not sure why you would be needed 2 motors to start with, you could use a belt drive

This Vibrating Table is 9ft x 15ft! I'm vibrating moulds up to 15to. And currently I have a setup with one Motor controlled by a VFD. The Motor is connected to a gearbox which is connected via two toothed belts to the shafts. This setup is working, but very noisy and since the is a lot of dust involved in Epoxy Concrete Production the Belts are wearing very fast.
I thought about the step/dir approach. But I need for my Production Environment a very simple Control Panel. Best would be just one Potentiometer.
Many Thanks again for giving me your advice!
Karl

[mactec54]

This Vibrating Table is 9ft x 15ft! I'm vibrating moulds up to 15to. And currently I have a setup with one Motor controlled by a VFD. The Motor is connected to a gearbox which is connected via two toothed belts to the shafts. This setup is working, but very noisy and since the is a lot of dust involved in Epoxy Concrete Production the Belts are wearing very fast.
I thought about the step/dir approach. But I need for my Production Environment a very simple Control Panel. Best would be just one Potentiometer.
Many Thanks again for giving me your advice!
Karl

The servo motors are not going to like the vibration even with a flexible coupling, the system you are using is always going to be noisy, I used to build finishing machines that used the same kind of shaft mounting with the counter weights like what you are using, and use couplings similar to this for direct connect to the motor