Rules For Apply Microflame Soldering

A

For soft soldering the flame shall always be directed on the part with the highest thermal mass.

B

The solder wire transport to target shall be released only when the part to be soldered has reached the minimum melting temperature of the solder alloy.

C

The solder wire shall be molten by the heat deposited already by the flame into the part(s) ot be soldered. The wire shall not be molten by direct flame heat interaction. Following this procedure completly eliminates the risk to create those hard to detect "cold" joints.

The melting of the solder wire mass itself also consumes heat calories. Too small a soldering part might no be able to stare enough heat to melt the approaching solder wire. Therefore during the melting process additional heat must be supplied by the flame. This needs an overlap. 
The melting process of the solder will "freeze" temporarely the joint temperature. As long as solid solder melts melting energy is absorbed and no temperature rise can take place. With proper timing and dosing of the solder wire feed speed the part temperatures can be clamped temporarely to avoid temperature excesses.

The following parameters do define the microflame soldering process:

T1

The Flame Heating time defines the time the Flame Delivery Cylinder Z1 is in its work position.

T2

The Delay Time between arrival of flame in work position and the start of the solder wire feed cylinder.

Steps / second

The Solder Wire Feeder itself is characterized by the Solder Wire Feed speed defineed as steps persecond performed by the driving stepper motor. These instructions delivered by the Controler, and

Number of steps

which defines the total length of solder wire feed corresponding to the number of steps the stepper moves. The stepper motor principle combined with the digital control and process data input gives the needed precision and repetition.

Not only length of wire defines the solder amount deposited, but also the diameter of the solder wire. Solder Wire with diameters between 0,5 mm and 1,5 mm can be handled. For precise adaptions specific extra drive roller sets are available.

The parameters are easily keyed into the handheld terminal. By pressing Key F2 the new set of parametes is the download and stored in the LA2000SS Control box.The terminal must be connected to the Control box only during the parameter download or modification. The Terminal removal protects the process values stored in the control box from being tampered with by unauthorized persons. The terminal when unplugged from Control box can used to handle any number of Control boxes.

Identical parameter values can be downloaded to as many needed control boxes, but also uploaded from a Conrol box terminal.

A very user friendly cursor based value selection makes using the Terminal a snap.