Elevator debugging process(b)

1.1.2 encoder checks.
Pulse encoder feedback control system is important to ensure accurate, especially for synchronous motor of the elevator test tool, which is likely to slow bad installation when debugging Speed ​​phenomenon. So check before commissioning to focus.
1) Check the encoder is securely installed, wiring and reliable.
2) Check the encoder signal wires and power circuits are partakers groove arrangement, to prevent interference.
3) encoder connection preferably directly from the encoder connected to the control cabinet, if the connection is not long enough, need to be extended, then the extension should also use shielded cable, with the encoder connection with the soldering iron.
4) encoder shield grounded at the controller end and reliable.