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11 Station extensions / hardware User Manual SIPLACE 80S- 20/F4 11.9 Flux dispenser unit Software vers ion SR.406.xx 02/2000 I ssue US 494 CAUTION If the flux dispen ser is li kely to be out of service for any time (mo r…

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User Manual SIPLACE 80S-20/F4 11 Station extensions / hardware
Software version SR.406.xx 02/2000 Issue US 11.9 Flux dispenser unit
493
11.9.3 Functional description
The centrifugal tube (3) is used as a reservoir, and is filled with flux. A pump sucks the flux via the
valve (2) up into the syringe (1). The syringe (1) then dispenses the set volume of flux, via the
valve and the tip of the dispensing needle (6), onto the placement position. 11
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Fig. 11.9 - 1 Fluxing overview
(1) Syringe (2) Valve
(3) Cover of reservoir (4) Reservoir (centrifugal tube)
(5) Centering nozzle (6) Tip of dispensing needle
(7) Press-fit cap (8) Retainer
11 Station extensions / hardware User Manual SIPLACE 80S-20/F4
11.9 Flux dispenser unit Software version SR.406.xx 02/2000 Issue US
494
CAUTION
If the flux dispenser is likely to be out of service for any time (more than 1 hour), the press-fit cap
must be pulled over the centering nozzle. This will prevent the flux from crystallizing, and thus
sealing the centering nozzle. 11
The flip-chip component is inserted at the placement position, and held in position for a pre-set
time to allow the flux to dry. 11
Fig. 11.9 - 2 Principle of a component with flux
(1) The flux charge runs to the leads
11
The PCB then remains in the machine for a variable period to ensure that the flux has dried fully. 11
The procedure for entering the required parameters is described in Section 11.9.7.1 Package form
list and parameters. 11
11.9.4 Refilling the flux
A warning is output at the station computer when the flux has to be refilled. It is possible to con-
tinue placement for a short period, but the reservoir should not be allowed to run dry in order to
avoid unwanted periods of stoppage. 11
PLEASE NOTE
The reservoir must be refilled off the machine to prevent flux being dropped into the machine. 11
Å Move the fluxer head into the refill position. See Section 11.9.7.4 Single functions
Å Pull the reservoir up and out of its retainer, and turn the lid to remove it from the tank. See Fig.
11.9 - 1 "Fluxing overview".
111
User Manual SIPLACE 80S-20/F4 11 Station extensions / hardware
Software version SR.406.xx 02/2000 Issue US 11.9 Flux dispenser unit
495
Å Refill the flux, replace the lid, and return the reservoir to its retainer. See Fig. 11.9 - 1 "Fluxing
overview". Make sure that the reservoir is firmly seated in the retainer.
Å Use the Single Functions to flush the fluxer head until the hose and syringe are free of air, and
the flux emerges continuously. See Section 11.9.7.4 Single functions.
PLEASE NOTE
Always make sure that there are no air bubbles anywhere in the dispensing needle. 11