DROUBLE SHOOTING
LEISTER Uniplan Wedge
Problem
Possible cause
Solution
Poor weld strength
Wedge temperature too low. Adjust temperature to requi-
red welding temperature
and/or reduce speed.
Hot wedge (6)
too far from
Move wedge closer to
drive/pressure roller (8)
.
drive/pressure roller (8)
using
adjusting screw (21).
Faults at regular intervals
Drive/pressure roller (8)
Allow tool to travel several
along welded seam
out of true having been left
meters using motor switch;
in standing position.
always lift tool onto
lifting
device (12)
after weld runs.
Lower membrane ripples
Membrane tension too low.
Increase membrane (material)
tension.
Hot wedge (6)
too close to
Remove
hot wedge (6)
some-
drive/pressure roller (8).
what further from
drive/
pressure roller (8)
using
adjusting screw (21).
Pinch roller (9)
may be stiff.
Contact authorised Service
Centre.
Edge of weld outside the
Incorrect overlap widht
Hot wedge / overlap width
seam on the under side of
selected.
20mm / 23mm
the upper
30mm / 31mm
The machine tends to the left Connection lead is not
Connection lead must run
or right of direction of travel
running directly behind tool.
freely behind tool avoiding
The cable may be rubbing
rubbing points.
against table edge.
The adjustment between
Check adjustment between
guide cover (26)
and
guide
guide cover (26)
and
guide
roller (25)
has shifted.
roller (25)
using ruler, re-align
guide cover (26)
if necessery.
Adjusting screws on
See Page 5 for
drive/pressure
drive/pressure roller (8)
are
roller (8)
track correction or
out of adjustment.
contact authorised Service
Centre.
10
Power control: heater/drive
Control of the welding process and fault recognition by means of power
requirement display (see Page 6).