Trainee Guide TR-L2-M2000
Level 2 Maintenance Training – M2000 Dispensing Systems 2-2-38 P/N 73-0018-00 (Revision B)
Information Sheet 2-6-5
DJ-2000 Series
A. Description
1. The DJ-2000 Dispense Jet is a high throughput, air-actuated, dispensing jet. These
devices are referred to as “jets”, because they use an air-activated needle to force a
jet of fluid from the fluid chamber.
2. The DJ-2000 employs a non-contact dispensing method in which individual drops of
material are formed and shot from the nozzle to the substrate.
B. Operation
1. The DJ-2000 dispenses fluid using an air-actuated pin mechanism.
2. The dispenser supplies air to the solenoid (air valve). The solenoid opens, and air
flows into the pin chamber.
3. Air pushing on the piston raises the needle, retracts the ball from the extension seat
and compresses the spring. Adhesive fills the void left by the ball.
4. When air vents from the solenoid valve, the spring returns the ball to the extension
seat. As the solenoid closes, the air vents out, and the spring-loaded needle is
forced downward, forcing fluid through the nozzle.
5. The ball breaks the string of adhesive flowing through the nozzle. Within
milliseconds, the solenoid coil is de-energized releasing the needle rod.
6. The spring drives the needle back to its original position.
C. Features
1. Eliminates Z-axis motion.
2. High speed.
3. Over 50,000 dots per hour.
4. Highly accurate.
5. Dot repeatability of ±3%.
D. Adjustments
1. There are two primary setup adjustments to the DJ-2000 that control fluid flow as
well as dot quality and consistency.
Adjusting the Preload Setting
Micrometer Setting and Adjustment
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