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Page 12 GS-394-02 Scrap Lead Removal Scrap leads remaining in the head chain clips after component insertion are released automatically in the chain-to-chain cabinet before the chain returns to pick up new components. Sc…

Page 11GS-394-02

Insertion Hole Span

Both the head and clinch component insertion spans are automati-

cally calculated by the Advanced Product Editor, and based on lead

diameter and center to center hole spacing on the PC board.

Insertion hole span range is dependent upon head tooling configura-

tion.

Refer to Technical Specifications section for insertion hole span

ranges.

Component Centering

Before insertion into the PCB, each component in the head chain is

accurately centered. Component centering is achieved by using a

servo driven cam system. The unique cam design allows both rapid

positioning of the centering fingers and precise centering action prior

to component insertion.

The centering device is belt driven by the tooling insertion axis, and

requires no air cylinders or sensors to operate. Only four simple set-

up adjustments are required.

Insertion Tooling

Universal offers two types of insertion tooling: standard and 5mm.

Tooling type is selected to provide optimum performance depending

upon board density (footprint), component lead wire size and

material, component body size, hole spans, and board configurations.

Compared to pre Generation 8 machines, the current tooling has

been designed for improved reliability, longer tooling life, and better

handling of bent lead component input. This tooling incorporates

generous amounts of carbide inserts and has increased cross-

sections for greater robustness.

Refer to Technical Specifications section for tooling specifications.

Above board clearance beneath the retracted tooling is approxi-

mately 20.32mm (0.800"). See Tooling Footprints and Component

Clearances sections relating to tooling footprints.

Page 12 GS-394-02

Scrap Lead Removal

Scrap leads remaining in the head chain clips after component

insertion are released automatically in the chain-to-chain cabinet

before the chain returns to pick up new components. Scrap drops

into a waste basket in the left bottom side of the transfer cabinet.

Cut and Clinch

Once a component has been inserted into the PCB, the cut and

clinch mechanism clinches the two leads to a repeatable angle, and

then cuts the leads to an adjustable length. The cut and clinch

contains a servo-driven rocker/slide up/down mechanism and pro-

vides PC board support during the insertion cycle, then trims and

clinches the component leads to the underside of the PC board with

a pneumatic actuated cutter.

Two-step operation allows the clinch to return to its lowest position

during a table rotation and only half the distance during the insertion

process, saving time and wear on mechanical parts. Insertion span

is servo controlled over the same span as the insertion head, and left

and right anvils are coupled.

Clinch angle is inward and may be adjusted over a range from 0º to

45º from the PC board bottomside. Clinch lead length is adjustable

from 1.28mm (0.050") to 1.80mm (0.071"). Lead length is measured

from the center of the insertion hole to the end of the lead. The

tolerance on the lead length is ±0.29mm (0.011").

The VCD/Sequencer 8 cut and clinch uses a dual lead continuity

check to verify component insertion. The failure of either lead to

pass through the PC board and be clinched will generate an insert

error and cause the machine to stop.

Clinch

Length

Clinch

Length

Finished Clinch Example

0° Clinch 45° Clinch

Page 13GS-394-02

Chain-to-Chain Transfer

The chain-to-chain system transfers components from the sequenc-

ing chain to the insertion head chain. The design minimizes set-ups

and adjustments and uses a servo motor belt drive system, with

position feedback encoder, to provide a highly reliable component

transfer. Automatic belt tensioning assures that belts are properly

adjusted.

Low Part Sensing/Display

The low part sensing feature provides the operator with a visual

alarm display whenever any input tape station nears empty within

each add-on module. Each input station contains a roller-type sensor

flag assembly that interrupts a light beam when the tape runs out.

The main machine tower light illuminates, and an audible alarm is

sounded, when a low part condition is sensed. The tower light is

reset when a new reel or box of components is installed and the

sensor is reset on top of the new tape. In addition, an error message

is displayed on the monitor to inform the operator of the location of

the low part condition.

Scrap Tape Removal

The two scrap tapes from each dispense head drop down into the

removable scrap bins located beneath the dispense heads. These

scrap bins are open on both ends so that tape can be swept through

all add-on modules and removed in one location.

Machine Status Light/Audible Alarm

The machine status light/audible alarm indicates the status of

machine operation. Each of the lights are user configurable via the

machine software.

• Red

• Yellow

• Green

• Blue

• Audible alarm