Manual

Needle Sensor 11-3
Operation
The NS Series Needle Sensor works with both FMW and FMDOS. The NSZ Series Needle
Sensor works only with FMW. The software on the dispensing system is configured at the
Asymtek factory to work with either type of Needle Sensor.
Theory of Operation
The dispensing needle is inserted into the slot in the sensor and passed in front of two light
beams, one for the X-Axis and one for the Y-Axis. When the needle breaks the beam, its
location is recorded. The needle location is sent to the dispensing software which uses the
(X,Y) coordinates to locate the center of the needle. The Z-Axis location of the needle tip is
also determined and recorded.
The Height Sensor uses the Load Cell on the NSZ Series to determine the Z-height of the
needle tip. The dispensing head lowers and touches the needle tip to the Load Cell and the
height of the needle tip is recorded and sent to FMW.