Analysis:

The machine for the first time they have to zero every start, to find the right starting position to implement this feature is to use a cylindrical sensor switch mounted next to the motor, it is triggered by a screw inside, zero is the right circle triggers a sensor switch only turns on when a sensor switch is triggered when the correct zero end, the machine will stop at the home position, sensor switch lights. The distance between the sensor switch and the nut in 2mm better, too easy to hit, far less than would be induced signals.

Cause of the problem:

1. The position sensor switch mounted too close, causing the switch has been steady.

2. The position sensor switch mounted too far, less signal induction.

3. The sensor switch bad, Always or often does not shine.

Solution:

1. reinstall sensor switch, the method is to rotate the camshaft screw high, then the sensor switch mounted, screw bit and then hit the switch back two wire port can be.

2. if you replace the bad judgment switch sensor switch.