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REEL VERIFICATION-MACHINE AUTO START

IP.com Disclosure Number: IPCOM000006162D
Original Publication Date: 1991-Jul-01
Included in the Prior Art Database: 2001-Dec-10
Document File: 2 page(s) / 101K

Publishing Venue

Motorola

Related People

Jesse DeGuzman: AUTHOR

Abstract

Typical Front End PC Boards assembly lines utilize several types and models of Panasonic pick and place machines. These machines are used to mount different types of components; axial, radial, top and bottom side surface mount components. Each machine has a board transport and assembly mechanism in the front and a moving carriage for components set up in the back. (See Figure 1). Depending on the type of the machine, the carriage will have varying numbers of positions or slots for reels, boxes, or reel feeders of components. The machine has a fixed location pick up/mounting head for the placement of the component on the board. When the machine is in operation, the carriage moves to position the component under the pick up head and the head picks up the component from the feeding device. After the component has been picked up, the head orients the component. The X-Y table sup- porting the PCB then locates the mounting location for the component under the placement head and the head places the component on the board. Orientation and placement location of the component are coded in the NC program. None of these machines have the capability to recognize the part number or the electrical value of the component it is placing. Therefore, it is extremely important that the correct component be loaded in the assigned slot on the carriage.

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MOTOROLA INC. Technical Developments Volume 13 July 1991

REEL VERIFICATION-MACHINE AUTO START

by Jesse DeGuzman

  Typical Front End PC Boards assembly lines utilize several types and models of Panasonic pick and place machines. These machines are used to mount different types of components; axial, radial, top and bottom side surface mount components. Each machine has a board transport and assembly mechanism in the front and a moving carriage for components set up in the back. (See Figure 1). Depending on the type of the machine, the carriage will have varying numbers of positions or slots for reels, boxes, or reel feeders of components. The machine has a fixed location pick up/mounting head for the placement of the component on the board. When the machine is in operation, the carriage moves to position the component under the pick up head and the head picks up the component from the feeding device. After the component has been picked up, the head orients the component. The X-Y table sup- porting the PCB then locates the mounting location for the component under the placement head and the head places the component on the board. Orientation and placement location of the component are coded in the NC program. None of these machines have the capability to recognize the part number or the electrical value of the component it is placing. Therefore, it is extremely important that the correct component be loaded in the assigned slot on the carriage.

  Instituting a standard parts set-up on the machine, that always keeps the same component part number at a given feeder location on each machine, simplifies the implementation of the system described below. The same concept can be applied to a multiple set-up system by using different databases for each set-up.

  The principal concept is to prevent the operation of the machine after the feeder set-up has been disturbed. The operator must verify the correct reel/feeder/slot combination.

The means to implement this concept consist of (See Figure 2):

1. Bar code labels on each feeder, machine slot, and parts reel
2. The Feeder Removal Auto Detect System
3. The Bar Code Reader System
4. A Machine Inter-lock mechanism

BAR CODE LABELS

  Bar code labels are placed on all operators' badges...