Rev. F, December 2020
Page 16
Pro-Wedge VM-20 Operator’s Manual
Adjustment procedures for Auto-Engage bracket (Figure 7.7):
With material set-up piece in place and with nip lever and wedge engaged as
shown on Figure 7.6, use a 5mm Allen wrench to loosen the wedge mount bolt
that connects the wedge hex mount to the lock mount (#1, Figure 7.7). For HDPE
set-up, position lock bolt as far down in slot as possible and tighten bolt.
Using a 3mm Allen wrench, loosen the two lock screws (#2, Figure 7.7) that hold
the lower wedge slide to the auto-engage bracket. You will need to insert the
3mm Allen wrench between the cartridge heater lead wires to access one of the
screws.
Move the heating wedge forward or backward (left or right) so that there is plenty
of clearance between the tip of the wedge and the upper and lower nip rollers.
When adjusting Pro-Wedge for welding HDPE the tip of the wedge should have
the same clearance as shown in Figure 6.
Tighten lock screws to set adjustment. Re-check all adjustments to make sure they
are correct before disengaging nip lever and wedge and removing material setup
piece.
8
Welding Procedure
8.1
Power Up
Connect the Pro-Wedge power cord to power source making sure that the voltage is correct
for the model of welder you have. Please refer to Sections 6.2, 6.3, and 6.4 on pages 4 - 6
of this manual for details.
Flip the main power toggle switch (#4, Figure 8.1) to the “on” position (up). The main
power switch is located on the front of the control box, below the front handle. After a 3
second delay, the temperature control unit (#1, Figure 8.1) located on top of the control
box should light up and display current wedge temperature.
Turn on the drive motor with the motor switch (#3, Figure 8.1), located on rear of the
control box, near the nip pressure adjustment hex nut. It is recommended that the drive
motor remain on at all times while the welder is plugged in. This helps to eliminate hot
spots on the nip rollers and makes starting a weld quicker and easier.
