headbngr76
Member
- Join Date
- Apr 2004
- Posts
- 3
Here is my application. I have and point to point indexing application that uses a 200pls A/B Phase encoder hooked up to the PLC. The PLC also adjust the speed on a AC Vector Drive via a Frequency input. I'm using the PLC high speed zone compares to stop the drive at desired postions. It stops the drive always off the compared value but always stops the drive within +/-2 pulses of the same off postion. I think the largest error is generated by the Deccel time setup in the AC Drive. If I lower the Deccel time in the drive the postion error is greatly reduced. Is there any calculation that I can do using the speed I set and the deccel time used in the AC drive to get an offset encoder postion to use in the high speed compare?
Here is the Spec on my system:
200pls/rev A/B ecoder mounted on gearbox
geabox 10:1
motor 1695rpm
Acc Drive Deccel time=.01s
Here is the Spec on my system:
200pls/rev A/B ecoder mounted on gearbox
geabox 10:1
motor 1695rpm
Acc Drive Deccel time=.01s