Sony LH71A Bedienungsanleitung Seite 141

1. Cautions
• Before use, be sure to turn the steel ball with the fingers about the axis of the shaft 2 or 3 times both
clockwise and counterclockwise so that the steel ball rests properly on the end of the shaft.
If this not done, the rust-preventive grease between the steel ball and shaft might cause a detection error.
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• Do not turn the steel ball more than 180d in either direction since a spring is connected to it.
• Do not pull the steel ball and let it spring back sharply against the end of the shaft.
• Fix the shank to the main spindle in such a way that the shank is not inclined against the axis of the
spindle, since inclination of the shank will cause errors in the measurement.
• For more precise positioning at the center of the workpiece: Touch the workpiece with the feeler ball 1.
Then, move the touch sensor to the other side of the workpiece, rotate the shank holder of the machine
through 180° and then touch the workpiece 2. Half the measured value is the center of the workpiece.
Axis of spindle
1
LH71A / LH72
Give a 180d turn 2 to 3 times
(No more than 180 d)
Shaft
Spring
Steel ball
Dust cover
Axis of spindle
Center
2
Workpiece
Rotate the shank holder of the machine
through 180° and then touch the workpiece.
7. Operation Method
7-19
(E)