Training Guide Course No. 196514
Level 2 Maintenance, X-1000 Series Dispensing Systems 2-92 P/N 196515 (Revision A)
Information Sheet 2-11-1
Height Sensor
A. Height Sensor
1. The height sensor checks and gauges substrate height to help maintain a
consistent dispensing gap.
2. It uses a stainless steel probe to contact the dispensing surface.
3. When the dispensing head lowers and the probe tip contacts the substrate, it
triggers an I/O in the Height Sensor.
4. The Height Sensor sends the substrate height information to the FmNT
software.
B. Theory of Operation
1. The FmNT software sends a CAN message to the Dispense Head Controller
(DHC), which orders the Height Sensor probe to lower.
2. Next, the Programmable Multi-axis Controller (PMAC) orders the Z-axis Servo
Motor to lower the Dispensing Head until the Height Sensor probe tip
contacts the substrate.
3. When the probe contacts the substrate, it triggers an Input/Output (I/O) bit
in the Height Sensor which sends a substrate height signal through the DHC,
to the Main Interface PCA, and then through the PIO-96 card in the system
Computer.
4. The PMAC position capture register captures the Z-axis position of the
Dispensing Head, and sends a stop signal to the Z-axis Servo Motor.
5. The FmNT software then processes the routine.
C. Height Sensor Setup
1. If you upgrade the FmNT software or change or adjust the Height Sensor,
you will need to configure the height sensor and perform any necessary
probe adjustments.
2. You will also need to perform one of the following setup procedures:
Calculate Master Offsets (CMO).
Valve Offsets (VO).
Scripted Valve Offsets (SVO).
Camera-Assisted Scripted Valve Offsets (CASVO).
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