00193161-01 - 第44页

Placement of 0 402 components Manual S-20/S-23 HM/S-25 HM/F4/F5 HM/HS-50 03/2001 edition 44 4.4 Nozzles Å Have th e nozzl e magazin es been fill ed co rrectly for the curr ent set-up ? Å Has a ref erence run been car rie…

Manual S-20/S-23 HM/S-25 HM/F4/F5 HM/HS-50 Placement of 0402 components

03/2001 edition

4 Checklist for the placement of 0402 components

4.1 Changeover table

Is the surface for the feeders free of components and metal splinters?

Å Has the changeover table been coupled and locked in place correctly?

When coupling the table, makes sure that the contact surfaces for the changeover table inside

the machine are clean.

Å Do the large tape reels run on spindles?

Å Are the partitions in the tape container locked in place correctly?

Å Has the maintenance described in the maintenance manual been carried out?

4.2 Feeders

Å Are the feeders clean and have all loose components been removed?

Å Do the feeders sit flat, without rocking, on the bed of the changeover table?

In particular, look out for loose components and metal splinters on the bed of the changeover

table.

Å Is the feeder pitch set to 2 mm and is it checked regularly?

Å If paper tapes are used, are the tape supports inserted and positioned correctly?

Å Can the component cover be moved easily?

Å Check that the component cover is not damaged, dirty or oily?

Å Is the component at the correct pick-up position?

Å Has the preventive maintenance for the feeders been carried out?

Å Are the rubber blocks in position on the component cover and in good condition?

Å Has the feeder position recognition system been activated, if required?

Å Are the feeder position recognition fiducials clean and undamaged?

4.3 12-segment Collect&Place head

Å Has the necessary preventive maintenance been carried out?

Å Have you checked any location-related track errors on the station computer, particularly

‘vacuum errors’ and other track errors in relation to the segment and feeders?

Placement of 0402 components Manual S-20/S-23 HM/S-25 HM/F4/F5 HM/HS-50

03/2001 edition

4.4 Nozzles

Å Have the nozzle magazines been filled correctly for the current set-up?

Å Has a reference run been carried out to check the vacuum values and height offset values?

Å Have the ceramic nozzles been cleaned as described in the job guide?

Å Were the nozzles checked afterwards?

Å Are the nozzle suction surfaces undamaged?

Å Has nozzle scanning been activated, if required?

4.5 Components

Å Who is the manufacturer?

Å Have the mechanical and electrical tolerances been observed?

Å Was a quality check carried out, and has it been certified?

Å Are the leads or connection surfaces of the component in good condition (corrosion, tinning,

shape)?

4.6 Other points to note

Make sure that the component is picked up by the nozzle as centrally as possible. If the

component is set down on the solder pad, it is much less likely that the nozzle will be contaminated

by surplus solder paste. You can prevent the components being picked up off-center by

– regularly using a vacuum cleaner to clean the feeder supporting surface on the component

table, thus ensuring that the feeder lies flat.

– carefully moving the component table into the machine and locking it in place.

– activating feeder position recognition, if possible.

– only replacing the nozzles on the Collect & Place heads manually in exceptional

circumstances, and generally picking up automatically from the nozzle magazines.

– activating nozzle scanning, if possible.

– scanning the nozzles at regular intervals and replacing dirty nozzles.

– using a PCB support so that the PCB does not sag during placement.

– keeping to and not increasing the GF tolerances.

Manual S-20/S-23 HM/S-25 HM/F4/F5 HM/HS-50 Placement of 0402 components

03/2001 edition

5 Component feeders for 0402 components

5.1 Types of feeder

5.1.1 8mm S II feeder

Fig. 5 - 1 8mm S II feeder

Article number 00141096-xx

Width 30mm

Tracks per feeder 2

Maximum number of feeders 2 x 20 (S/F); 4 x 12 (HS-50)

Stock of components for 7” reels approx. 10,000 – 15,000

Reel diameter 7" - 15" (max. 381mm)

Transport pitch (variable) 2mm / 4mm

Cycle time 60ms

Power supply 30 V-