Training Guide Course No. 196514
Level 2 Maintenance, X-1000 Series Dispensing Systems 2-108 P/N 196515 (Revision A)
Information Sheet 2-12-1
Needle Sensor
A. Needle Sensor
1. The needle sensor automatically compensates for XYZ changes in needle
position due to a needle change or bent needle so that you can change
needles and continue production without reprogramming the system.
2. It does not
compensate for XYZ location changes in parts, substrates, tooling
or fixtures.
3. The needle sensor must be leveled to accurately locate the dispensing
needle.
B. Theory of Operation
1. When the dispensing needle is inserted into the slot in the sensor, it passes
in front of two light beams, one for the X-Axis and one for the Y-Axis.
As the needle interrupts a light beam, its location is detected.
The needle XY coordinates are sent to the dispensing software, which
uses the coordinates to determine the center of the needle.
The Z-Axis location of the needle tip is also determined and recorded.
2. The Height Sensor uses the Tactile Sensor to determine the offset between
the needle and the probe.
The dispensing head lowers and touches the needle tip to the Tactile
Sensor.
The height of the needle tip is recorded and sent to the FmNT software.
C. Needle Sensor Setup
1. If you upgrade the FmNT software or change or adjust the Needle Sensor,
you will need to perform one of the following setup procedures.
Valve Offsets (VO)
Scripted Valve Offsets (SVO)
Camera-Assisted Scripted Valve Offsets (CASVO)
2. If you change needles during a production run, you need to perform only the
shorter Find Needle XYZ procedure.
D. Needle Sensor Maintenance
1. The Needle Sensor requires no routine maintenance.
2. Wipe off dispensing fluid spills when necessary.
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