SL940-Install-Ops-Maintenance-7210918_B.pdf - 第82页

5-2 Operation 5.5 Easy Coat for Windo ws XP (ECXP) ECXP is Asym tek's propr ietary conform al coat ing sof tware f or use in a Window s XP environm ent. The software allows the use r to dev elop prog ram files (.EC …

Operation 5-1

5 Operation

5.1 Overview

Before operating your Select Coat SL-940E/SL-941E Series Conformal Coating System, it may be

helpful to familiarize yourself with the basics of how the system works. This section covers the following

topics:

• Basic System Operation • Daily Routine Procedures

• Conformal Coating • Installing the Coating Applicator

• Easy Coat for Windows XP (ECXP) • Filling the Fluid Reservoir

• Dispensing Operations • Changing Material/Flushing Fluid System

• Conveyor Operations • Focusing the Camera

• Detailed Operation (SL-940E) • Loading a Program

• Positioning the Robot • Running a Program

• Pneumatic Regulators and Gauges • Production Statistics

• System Startup/Shutdown

 NOTE In this section, typical SL-940E/SL-941E configurations are considered. However,

operational details may vary with the configuration of your system.

5.2 Safety First

Operation of the SL-940E/SL-941E involves heat, air pressure, electrical power, mechanical devices, and

the use of hazardous materials. It is essential that every person servicing or operating the coating system

fully understands all hazards, risks, and safety precautions. Refer to Section 2 - Safety for additional

information.

5.3 Basic System Operation

The SL-940E/SL-941E is a high-speed, high-accuracy coating system with integrated, closed-loop

process control that ensures superior coating quality. Process parameters are recorded and traceable

through Easy Coat (ECXP) software running on Windows XP operating system. Easy Coat for Windows

XP (ECXP) software controls both the robot movements and the dispensing operation.

The SL-940E has a chain conveyor, which carries the workpiece from an upstream machine, to a

dispensing station where fluid is dispensed, and then delivers the processed workpiece to a downstream

machine. The SL-941E is configured with adjustable tooling rails instead of a conveyor. The adjustable

tooling rail is ready to accept boards with a 3mm or greater edge clearance.

5.4 Conformal Coating

The Select Coat SL-940E/SL-941E Series Conformal Coating System is designed to apply conformal

coating materials with a high level of flexibility and consistency. Conformal coating is a material that is

applied to a circuit board to provide protection from chemical and mechanical damage.

Applying conformal coating is a two-step process. Dispensing the conformal coating is the first step.

After the conformal coating has been applied, it must be cured. The curing method depends on the coating

material. Most materials are cured by heat (infrared), UV (ultraviolet light), or moisture (humidity).

5-2 Operation

5.5 Easy Coat for Windows XP (ECXP)

ECXP is Asymtek's proprietary conformal coating software for use in a Windows XP environment. The

software allows the user to develop program files (.ECW file extension), which contain all the robot

moves and I/O operations necessary to coat the workpiece. Refer to 5.17 Loading a Program and 5.18

Running a Program for detailed instructions on how to load and run a dispensing program.

 NOTE A workpiece is defined as a board or substrate (PCB, PWB, etc.) or a carrier (pallet, auer

boat, lead frame, etc.) to be dispensed upon.

5.6 Dispensing Operations

All coating operations take place in a workcell. The workcell contains a robot with a coating applicator

mounted on the robot tool arm and a conveyor or adjustable tooling rails.

5.6.1 Robot Concepts

5.6.1.1 Home

The home position of the robot is a known position within the workspace defined by X, Y, and Z

coordinates. It is located at the front left of the workcell.

5.6.1.2 Robot Motion

Robot moves are specified as coordinates on the X, Y, or Z-axes. If a move combines motion in all three

axes, and the Robot Controller cannot move the robot in the Z-axis at the same time as the X and Y-axes,

then the move is performed (depending on the Safe Z Height setting) as follows:

• If the destination is higher than the starting point, the Z motion is performed first.

• If the destination is lower than the starting point, the Z motion is performed last.

5.6.2 Tool

A tool consists of one of the following: (1) coating applicator and nozzle, (2) teach camera, or (3) laser

pointer for programming.

5.6.2.1 Tool Offset

The tool offset is the X, Y, and Z distance from the robot's lower tooling pin to the tool tip (the end of the

nozzle). Robot position is calculated using the coordinates of the tooling pin plus the offset. Refer to

6.12 Robot Configuration to establish Tool Offsets.

5.6.2.2 Safe Z Height

This is the height below which the tool tip cannot go when moving in the workcell. It prevents the tool tip

from colliding with a board component, a fixture, or the conveyor. The Safe Z Height is set in the ECXP

program. Refer to 6.12 Robot Configuration to set the Safe Z Height.

5.6.3 Fixture

Fixture is defined as the location inside the work area used as a consistent and repeatable point for

positioning and queuing the product that will be coated. Refer to 6.9 Fixture Configuration.

Operation 5-3

5.7 Conveyor Operations

5.7.1 Chain Conveyor

The chain conveyor transports the workpiece into and out of the coating system. Operation of the

conveyor is automatic during production runs. An optical sensor detects the part as it arrives, triggering

the Conveyor Controller Module to activate the stop pin to stop the part at the correct location. Board pins

in the dispense zone secure the part in place during fluid dispensing.

5.7.1.1 Conveyor Adjustments

The conveyor should not need adjustment during normal operation. However, during programming, or

when replacing conveyor parts or changing the type/size of the workpiece, you may need to move the

board pins left or right, or adjust the distance between the conveyor rails.

To manually adjust the distance between conveyor rails:

1. Loosen the Width Adjustment Clamp (Figure 5-1).

2. Manually turn the hand crank clockwise or counterclockwise as needed.

 Turning the hand crank clockwise increases the distance between the rails.

 Turning the hand crank counterclockwise decreases the distance between the rails.

3. When you are satisfied with the distance between the rails, tighten the Width Adjustment

Clamp.

Item Description Item Description

1 Conveyor Rails 4 Conveyor Adjustment Clamp

2 Board Sensor 5 Hand Crank

3 Stop Pin 6 Board Pins

Figure 5-1 Manual Conveyor Width Adjustment