80S-20用户手册.pdf - 第509页

SIPLACE 80S-20/F4 User Manual 11 Station extensions /Hardware Software version SR.407.xx 01/2001 US Edition 11.9 Flux dispenser unit 509 1 1 .9.6 Replacing the complete dispensing needle and centering nozzle If the ce nt…

11 Station extensions /Hardware SIPLACE 80S-20/F4 User Manual

11.9 Flux dispenser unit Software version SR.407.xx 01/2001 US Edition

508

11.9.5 Changing the syringe

It is not necessary to change the syringe during normal operation. During servicing work, however,

it may be necessary to dismantle or change the syringe. 11

Fig. 11.9 - 3 Changing the syringe

(1) Knurled screw

(2) Syringe piston

(3) Syringe

(4) Unscrew the retaining nut

Å Use the Single Functions to move the fluxer head into the refill position. See section 11.9.7.4

Single functions. The syringe piston will move down.

Å Loosen the knurled screw on the syringe piston.

Å Push the syringe piston up. This will empty the syringe, and the flux will be pushed back into

the reservoir.

Å Remove the retaining nut together with the syringe.

SIPLACE 80S-20/F4 User Manual 11 Station extensions /Hardware

Software version SR.407.xx 01/2001 US Edition 11.9 Flux dispenser unit

509

11.9.6 Replacing the complete dispensing needle and centering nozzle

If the centering nozzle is defective, it can be replaced on its own. The dispensing needle is a com-

plete module, however. It may be necessary to change the complete dispensing needle if it or the

hose becomes clogged due to crystallization of the flux. In this case, the complete module must

be replaced. 11

Fig. 11.9 - 4 Changing the dispensing hose (tube blunt 29")

(1) Tip of dispensing needle (2) Centering nozzle

(3) Clamping parts (4) Lid of cylinder

(5) Complete dispensing needle (6) Valve

(7) Cylinder 11

11 Station extensions /Hardware SIPLACE 80S-20/F4 User Manual

11.9 Flux dispenser unit Software version SR.407.xx 01/2001 US Edition

510

CAUTION

When you unscrew the centering nozzle, make sure that you do not lose the two clamping parts

that hold the dispensing needle in the cylinder. 11

Å Loosen the centering nozzle.

Å Pull the cylinder lid away from the cylinder, and pull the complete dispensing needle out of the

cylinder.

Å Disconnect the dispensing needle hose from the valve of the dispensing pump.

Å Thread the new dispensing needle through the cylinder lid, through the cylinder and into the

centering nozzle. The tip of the dispensing needle must protrude approximately 3 mm from the

centering nozzle.

Å Tighten the centering nozzle once more.

Å Press the lid onto the cylinder.

Å Check the distance between the dispensing needle and the PCB. Press the down on the piston

– the distance must now be approximately 1 mm.

If this is not the case, you will have to reset the distance.