The position indicator is equipped with a hollow shaft, which is stuck directly onto the spindle. The spindle rotation is conveyed with a gear drive to a counter. To use this principle it is necessary that the position indicator is provided with a torque support. For this a pin of the housing sticks out into a drilling hole which is applied to the machine-side. The hollow shaft is connected to the spindle with an adjusting/pressure screw.
Position indicators with a directly driven counter are structurally not only very simple and therefore functionally reliable, but also very precise measuring instruments. The digital display allows a quick and accurate reading and setting of the respective position. These position indicators are suitable for installation in any position, however, require a machine side torque support (Stationary System). They are also suitable for motor-driven spindles (max. speed standard sheet see tables).
In general, the selection of the counter is determined by the pitch of the lead screw. Parameter is the display value after one revolution of the 0-position. However, the counter usually displays one decimal place marked red, with some climbs two places. The counter is also available in the variants of increasing number values by turning right (clockwise) or left (counterclockwise).