Fixpoint AP 2 - Notes on Application

14
Manual
The most commonly applied electronics solder is the Fixpoint
®
leadfree solder wire of
Fixpoint
®
solder wire L-SN 60 Cu 2 (DIN EN ISO 12224-1) with a tin content of 60% (60/40
solder). This solder is available in different wire diameters (0.56 - 1.5 mm). We recommend
a solder wire diameter of 1 mm for electronics.
 Beforeusingthesolderingstationthersttime,burnthesolderingtipfreeof
production residues and tin-coat it. Therefor switch on the soldering station and
let some soldering tin deliquesce at an approx. temperature of 200°C to a thin
 connectedlmonthesolderingtip.
The correct soldering temperature is crucial for the quality of the soldered spots. In
electronics the common soldering temperature is 300 - 380°C. Too low soldering tempera-
tures lead to cold solder joints. At too high soldering temperatures the solder core burns in a
way interrupting the solder ow. Moreover, there is a danger of damaging the circuit board
and other components caused to these high soldering temperatures. Wipe the soldering tip
directly before soldering with the moist cleaning sponge. Remains of incompletely vapou-
rised solder cores, oxides and other contaminations will be removed this way.and dissapear
from the soldering spot. Before replacing the soldering iron to the stand after work, the
soldering tip has to be cleaned again and be tinned with some new solder. It is important to
hold the soldering tip always tinned because otherwise it will become passive after a while
and disable to absorb solder anymore.
1. Hold the cleaned and well tinned soldering tip, heated up to the set soldering tempera-
ture, to the soldering wire and to the spot being soldered. Now the solder core ows and
cleanes the surface of the metal parts being soldered and then the soldering tip in order
to make the electrically conducting connection.
The soldering time in electronics is not longer than 2 seconds. A good soldering spot in
cooled status looks smooth and shiny after the removal of the soldering iron. Poor,
defective soldering spots look dull, uneven and brittle after cooling-down. Beside the
application of unsuitable solder or a too high soldering temperature set, defective
soldering spots often occur due to too short or too long soldering times.
A soldering spot may not be heated too long. On the other hand do not take away the
soldering iron from the soldering spot too early, but only when the soldering tin ows like
bare silver.
2. After nishing the soldering, leave some solder at the soldering tip before placing it into
the holder and switch off the soldering station. The remaining solder will then be wiped
off the hot soldering tip by the moist cleaning sponge before starting the next soldering
operation.
6.5 Notes on Application:
The easy handling and the short heating time might lead to careless handling of the
soldering station. Avoid this behavior absolutely! In order to ensure risk free soldering for
users and protecting the soldering station from damages, follow the safety instructions
and warning notes in this manual as well as the valid national or european directives.
NOTE: