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System Theory • Label Marking System PS288 Owner’s Manual 4—9 sors determine the position of the tape and whether the tape pocket contains a device or is empty . Other sensors de termine whether the device is seated prop…

System Theory • Input and Output Modules

4—8 PS288 Owner’s Manual

Input and

Output Modules

Devices may be presented to and re-packaged from the system in various

combinations. The input and output modules include:

• Tube input

• Tube output

• Tape input

• Tape output

• Tray input

• Tray output

These input and output modules may be used in any combination.

Tube Input and Output

The tube input and tube output modules are attached to the work surface

toward the front of the machine. Each module accommodates a number of

different sized tubes and each is adjustable. Tubes are inserted into the mod-

ules through holes in the safety shield designed for them. The input tube

module is slanted to cause the devices to slide toward the staging area, while

the output tube module is slanted to cause devices to slide away from the

staging area. There are no sensors to alert the user when a tube is full or

empty.

The tubes are gently vibrated to keep devices moving freely and reduce the

likelihood of device jams. The level of vibration may be varied using the

adjustment controls found on the right front panel of the machine. Each tube

vibrator is powered by 115 VAC from the I/O Controller.

Tape Input and Output

Manipulation of devices in a tape and reel form is supported in both input

and output modules, depending upon the configuration of the PS288. A tape

input feeder may be placed in a bracket on the right front of the PS288 to

provide the machine with devices to be programmed. Additionally, a tape

output system, attached to the Option Bay, can be equipped with either pres-

sure sealed cover tape or heat sealed cover tape capabilities.

The tape input feeder provides the system with devices to be programmed

via tape and reel. The tape is fed by a toothed sprocket along an adjustable

rail system. As the tape is fed, the cover tape is removed by a motorized

take-up reel, exposing the device to be picked from the tape. The tape is

advanced into the operating envelope one tape pocket at a time. Optical sen-

sors in the input tape module determine whether the tape pocket has a device

in place or is empty, as well as the position of the pocket in the tape. When

the PNP head removes the device from the tape pocket, the sensors detect the

pocket is empty and the tape is moved one position forward. Empty input

tape exits from the bottom of the tape feeder. It is not taken up on a reel, but

falls freely.

The tape output system allows programmed and marked (if a marking stage

is installed) devices to be placed in an output tape for use with another pick

and place machine on the production line or another facility. A reel of empty

pocket tape is placed on a spindle, and the tape is fed into an adjust-

able-width track. The tape is pulled through the track with a toothed sprocket

at a rate determined by the pitch (pocket size and distance) of the tape. Sen-

System Theory • Label Marking System

PS288 Owner’s Manual 4—9

sors determine the position of the tape and whether the tape pocket contains

a device or is empty. Other sensors determine whether the device is seated

properly in the tape before being covered.

When a device has been programmed, the PNP head moves the device to the

rear of the machine where a shuttle mechanism transports the device to the

marking stage (if installed), then to an empty tape pocket. Sensors determine

that the tape pocket contains a device, and the tape is advanced one position

as set by the pitch control on the tape output controller.

A roll of cover tape is installed on its dedicated spindle on the machine. It is

threaded through the tape output system so that it is applied to the pocket

tape before it is placed on an output spool. The cover tape may be pressure

sealed with a cold adhesive and pressure rollers or heat sealed with a hot

iron. The tape output system must be specifically configured for the type of

cover tape to be used. Sensors determine when the cover tape roll is empty

and needs to be changed.

When the tape is sealed, it is then collected on a takeup spool at the other

side of the tape output system. Sensors determine when the takeup spool is

full and needs to be removed.

Tray Input and Output

Devices may be presented from and returned to trays within the operating

envelope. Regardless of whether the PS288 uses static trays, the TF20 auto-

matic tray feeder, or the TF30 automatic tray feeder, there are two tray posi-

tions. Typically, blank devices are taken from the right-most tray,

programmed, and then placed back on the tray from which they came. The

left-most tray is typically used as a reject tray for devices that fail an opera-

tion during the programming routine.

The static tray input and tray output modules accept JEDEC and non-JEDEC

standard trays. The TF20 automatic tray feeder accepts JEDEC standard

trays, and the TF30 accepts all types of trays, including JEDEC standard.

Each type of tray must be “learned” by the PS288 so that the number of rows

and columns, as well as the pitch, is properly interpreted when picking

devices from, and placing devices in, the tray. Tray positions are fixed and

require no adjustment or calibration.

Label Marking

System

An option for marking devices is the label marking system which uses adhe-

sive labels.

In the label marking system the device is moved into the marking position. A

newly printed label is removed from its backing tape assisted by an “air

knife” mechanism. An air operated solenoid contains a specialized label

placement head consisting of a replaceable application surface designed for

the specific device package in use and a vacuum system. The labelling head

is moved over to and slightly above the waiting label, and a vacuum is

applied, removing the label from the backing. The head is then moved over

the device and lowered until the label adheres to the surface of the device

with direct pressure. Once the label is placed, the vacuum is removed, and

the head is moved back to the ready position above a newly printed label.

System Theory • Laser Marking System

4—10 PS288 Owner’s Manual

The marked device is then moved to its output media through whatever steps

are required.

The label marking system consists of the label feed mechanics (including

labelling tape supply reels, labelling head, and take-up mechanics), an air

powered transport shuttle mechanism, a print head computer (for printing

label data and control of label delivery mechanics), and a motion computer

used exclusively for the label placement head. The print head computer

receives label printing data from the Handler Computer AH500 software.

This data is used throughout the programming job. Each time a job is exe-

cuted, the labeler is reset and new label data is sent to the print head com-

puter.

The motion computer is a self contained, dedicated computer designed to

properly control the placement of the label on the device once it leaves the

backing tape. It has a series of sensors used to determine the position of the

label placement head and the presence or absence of devices on the labelling

pedestal of the shuttle transport. All mechanical adjustments are accom-

plished through software and are accessible through front panel controls of

the motion computer.

Laser Marking

System

The optional laser marking system, used to mark devices for easy identifica-

tion, is enclosed in the Option Bay attached to the rear of the PS288. It con-

tains a Laser Computer accessed from the keyboard and touchpad, a CO

laser tube along with its laser marking head and lens controlled by the Laser

Computer, and a shutter system for blocking laser radiation while marking.

The laser marking system is set up with a specialized marking program oper-

ating on the Laser Computer. Marking jobs are normally executed when the

programming job runs. For information on laser marking stage configura-

tion, see “Creating an Image File for the Laser System” on page 3-55.

After setting up the laser marking file to be used, the marking system stands

ready, waiting for a marking command from the AH500 software. When a

device has been programmed and is ready for marking, the PNP head places

the device on one of two pedestals on the shuttle transport, a shuttle mecha-

nism that moves the device from the operating envelope to the marking area.

Two pedestals on the shuttle are used to carry devices to be marked, and they

are used alternately when using a tray as the output media. Initially, a device

is placed in the second marking position and is transported to the marking

area.

When the device is ready in the marking area, the AH500 software sends the

Laser Computer a marking command. After the device has been marked, the

shuttle moves it back to the drop/pickup location. The system places an

unmarked device in the first marking position, then removes the marked

device from the second position and routes it to the output tray. The device in

the first position is then marked. This process continues, alternating marking

pedestals throughout the remainder of the job.

Laser Marking System and Tape Output System

If the PS288 is equipped with both a laser marking system and a tape output

system: