Application Description

An Original Equipment Manufacturer (OEM) manufacturer's X-Ray Scanning equipment is used in the quality control of printed circuit boards and wafer chips.

The OEM wants to replace the DC motors, mechanics and analog controls with an automated PC-based system to increase throughput and eliminate operator error. The host computer will interact with the motion control card using a "C" language program. The operator will have the option to manually override the system using a joystick.

An Original Equipment Manufacturer (OEM) manufacturer's X-Ray Scanning equipment is used in the quality control of printed circuit boards and wafer chips. In this application an automated PC based system replaces the existing system thereby increasing throughput and eliminating operator error. Moreover the operator has the option of manually overriding the system.

Machine Objectives:

• 2-Axis analog joystick
• Joystick button
• Travel Limits
• Encoder feedback on both axes

Display Requirements:

• X and Y position coordinates

• Dimensions of sample under test
• (0,0) position -- starting point

• AT-based motion controller card
• Replace velocity control system (DC motors) and mechanics with more accurate and automated positioning scheme
• Manual Joystick Control
• Continuous display of X & Y axis position
• User-friendly teach mode operations

Application Solution: The solution of this application uses the existing PC by providing a PC-based motion controller and the AT6200 to control both axes. The PC monitor is the operator interface while a "C" program controls the machine. The operation begins with a display of a main menu where a selection is made between the modes -- Automated Test, Joystick Position and Teach New Automated Test. The Automated Test mode allows for preprogrammed test routines to be downloaded to the controller where a test program is selected for use. The Joystick Position mode enables the joystick for use. The third mode downloads a teach program to the controller where new positions can be set and then stored and recalled in Automated Test mode.

Circuit Board Scanning (Application Solution)

The solution of this application uses the existing PC by providing a PC based motion controller and the AT6400 to control both axes. The PC monitor is the operator interface.

A "C" language program controls the machines.

Machine operation begins with a display to the operator of a main menu. This main menu lets the operator select between three modes: Automated Test, Joystick Position and Teach New Automated Test.

In Automated Test Mode, the PC displays a menu of preprogrammed test routines. Each of these programs has stored positions for the different test locations. This data is downloaded to the controller when a test program is selected. The controller controls the axis to a home position, moves to each scan position, and waits for scan completion before moving to the next location.

In Joystick Position mode, the controller enables the joystick, allowing the operator to move in both X and Y directions using the joystick. The AT6400 waits for a signal from the PC to indicate that the joystick session is over.

When Teach mode is selected, the PC downloads to teach program to the controller (written by the user). After the axes are homed, the controller enables the joystick and a "position select" joystick button. The operator then jogs axes to a position and presses the "position select" button. Each time the operator presses this "position select" button, the motion controller reads the position into a variable and sends this data to the PC for memory storage. These new position coordinates can now be stored and recalled in Automated Test mode.

Product Solutions:

• Indexer - AT6200
• Drive - ZETA4
• Motor - 0S22B
• Accessories - -E Encoder, Daedal X-Y Table, Joystick