Welding Procedure - Leister WELDMAX Manual De Instrucciones

Welding procedure

• By pressing the rod feed switch (14) the rod feed for the welding rod is switched on
(self-locking).
– Renewed pressing of the rod feed switch (14), will switch off the rod feed.
• Start up the tool using the rod feed switch (14), and let a little plastizised material
feed through.
• Adjust the desired rod feed speed by the potentiometer welding rod feed
speed (23) (depending on the seam geometry).
• Switch off the extrudate feed by using the rod feed switch (14).
• Point the pre-heating nozzle (5) at the welding area.
• Pre-heat the welding area by using a swinging motion.
• Position the tool onto the prepared welding seam and activate the rod feed
switch (14).
• Perform test welding by following the welding instructions from the material
manufacturers and national standards or directives.
• Do a test weld.
• Adjust the setting as required.
• CAUTION:
If the digital display SET value air temperature (21) is set higher than the digital
display SET value extrudate temperature (18) and the tool has been running for
some time without the rod feed, the digital display ACTUAL value extrudate
temperature (17) will have risen even though no adjustment on the SET value air
temperature (21) has been made. This operating condition should be avoided as
the extrudate will decompose thermally. By activating the rod feed via the rod
feed switch (14) and by adding the welding rod, the extrudate temperature will
adjust to its SET value again.
• Let the tool cool down after use.
Change of welding shoe
CAUTION ! Danger of getting burned.
• Do not change the welding shoe when the tool us cold.
• Switch off the hot tool and disconnect from the mains.
• Remove the welding shoe holder (3) from the heater tube (8). by loosening the set
screws for welding shoe holder (4) (use gloves).
• Clean the nozzle for extrudate (7) of welding deposits at every change of welding
shoe (see maintenance).
• Attach an appropriate welding shoe holder (3).
• The welding shoe holder (3) can be attached in four 90° offset positions.
• The welding shoe (1) can be taken off the welding shoe holder (3) by loosening the
set screws for the welding shoe (2) (eg. for reworking).
• Re-connect the tool to the mains supply and operate.
Change of welding rod
• Switch on the tool by the rod feed switch (14).
• Guide the new welding rod into the welding rod feed (15).
• Let the tool run until a pure strand appears from the nozzle for extrudate (7).
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