We are revamping an older packaging machine (new plc, new drives).
At the end of the machine there is a belt that synchronises with a belt of another machine. A 1024 ppr TTL encoder is mounted on the external belt, we have no setpoint information of the external machine. The external belt is Always running at constant speed.The external belt is running at 366 mm/sec or 110 rpm.
This would lead us to 7.5 increments / ms.
Servocycle of our motion controller will be 2 or 3 ms (still to decide), this makes 15 to 22.5 increments per servocycle.
The slave belt will be synchronised in a 1 to 1 ratio with the master belt, so alse 366 mm/sec. In the old program the slave synchronised over a slave distance of 25 mm. This would lead to
an acceleration of 2679 mm/s² considering constant acceleration. There is also a mode where the slave has to catch in an then sychronises in a 2 to 1 ratio, but over the same slave distance. This would lead to 10716 mm/sec².
Our slave servomotor has a 20 singleturn encoder that is used for position control.
Is the resolution of the external encoder (1024ppr) sufficiënt for the gearing we want to accomplish here (stability)?
Thanks
At the end of the machine there is a belt that synchronises with a belt of another machine. A 1024 ppr TTL encoder is mounted on the external belt, we have no setpoint information of the external machine. The external belt is Always running at constant speed.The external belt is running at 366 mm/sec or 110 rpm.
This would lead us to 7.5 increments / ms.
Servocycle of our motion controller will be 2 or 3 ms (still to decide), this makes 15 to 22.5 increments per servocycle.
The slave belt will be synchronised in a 1 to 1 ratio with the master belt, so alse 366 mm/sec. In the old program the slave synchronised over a slave distance of 25 mm. This would lead to
an acceleration of 2679 mm/s² considering constant acceleration. There is also a mode where the slave has to catch in an then sychronises in a 2 to 1 ratio, but over the same slave distance. This would lead to 10716 mm/sec².
Our slave servomotor has a 20 singleturn encoder that is used for position control.
Is the resolution of the external encoder (1024ppr) sufficiënt for the gearing we want to accomplish here (stability)?
Thanks