Rev. F, December 2020
Page 15
Pro-Wedge VM-20 Operator’s Manual
Warning!
If the rear lower contour roller is adjusted too high, there will not be enough
clearance for the top sheet to travel through the welder and it will be pinched between the
top of the heating wedge and the upper nip frame. This will result in loss of welding nip
pressure and an inconsistent weld.
Adjust the front lower contour roller (#4, Figure 7.6) up and to the right
(counterclockwise) until it just comes in contact with the material. The roller
should have a slight amount of resistance as you rotate it. If you adjust it to tight it
will rock the wedge and change the rear roller (#3) adjustment.
Note 5
: If you are setting up the Pro-Wedge to weld thin material or in very hot ambient
conditions the front contour roller (#4) adjustment should be set very loose or backed off
completely to reduce material dwell time (over heating material) and minimize the
possibility of burn outs.
Step 4: Set-up Wedge Fore/Aft Adjustment
The fore/aft adjustment sets the limit of travel of the heating wedge in its fully engaged
position. In other words, how close the tip of the wedge is to the nip rollers. If the tip of
the wedge is too close to the nip rollers they will pinch down on the wedge when pressure
is engaged, reducing the amount of nip pressure on the heated material. This can also cause
damage to the tip of the wedge when running out of the end of the seam.
The Auto-Engage Bracket (P/N 100-200AU/A) shown below provides the ability to adjust
the heating wedge position in relation to the nip-rollers. See below for more details.
Figure 7.7
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