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10. Welding Sequence and Tips
10.1
Welding Sequence
Caution: Never use machine with a heated wedge without weld material. The material is needed for cooling
the wedge. Risk of overheating and destroying the wedge. Weld material prevents the wedge being drawn in.
Preparing a weld/test mode
To prepare a weld, the welding parameters must be defined. We recommend gradually adjusting the parameters while
using small test strips and the same material pairing until a good weld seam can be achieved.
Performing a weld
Once the welding wedge has been adjusted, the weld can be controlled using the pedal. Press the left-hand pedal (7A)
of the pedal unit (7) to raise the upper wheel. Now place the material as required and release the pedal. The material
is now compressed with the defined clamping pressure. Start the welding process with the right-hand pedal (7B) of the
pedal unit. The welding wedge (22) moves to the welding position and the wheels turn at the defined start speed.
Depending on the pre-heating time set, the transport rollers (4) begin to turn after a delay and transport the mate-
rial. Guide the material freely or using the optional guides. If necessary, you can increase the speed steplessly with
the same pedal (7B) by pressing the pedal down. Continue the welding process until the end. As soon as the welding
process has stopped, you can end the process using the left-hand pedal (7A) and remove the material.
Switching off the machine
Allow the machine to cool down completely in the swiveled-out position. You can then operate the main switch (10)
and switch off the machine.
10.2
Tips for a Better Weld Result
Material tension
Try to feed the material into the welding zone with as little tension in the material as possible. In practice, tension is
inevitable but can be significantly reduced by feeding in the material correctly.
Pay attention to how the material leaves the welding zone too. The still warm weld seam should not immediately fall
downward upon leaving the welding zone. The cooling phase should also be as tension-free as possible. It is advisable
to use a table or other similar object on which the material can rest after it leaves the welding zone.
Speed
Feeding in material requires experience. Personnel new to the process should start with a lower welding speed to get
a feel for feeding in the material. The speed can then be increased in increments.
Cold run-through
To begin with, practice the welding sequence with a complex shape without swiveling in the welding wedge (22). In
the "Periphery" area, set the wedge (22) to "Manual". By doing this, you can get a feel for the weld shape without
damaging the material to be processed.
Be ready to stop the welding process
Always be ready to interrupt the welding process with the left-hand pedal (7A) of the pedal unit (7). In the event of a
material feed error, this enables you to stop the welding process quickly and realign the material.
Saving recipes
Save recipes in a logical place for repeat orders. This makes it considerably easier to determine parameters when
welding the same material again.
Guides
Use the guides that are available as accessories. Correctly adjusted guides guide the material and enable a consistent
weld seam. Ask your distributor for information on the various guides available.
Regular breaks
Working on the SEAMTEK W-AT requires a high level of concentration. Take a break if you feel tired.
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