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Rev. F, December 2020
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, Error! Reference
source not found. and Error! Reference source not found. on page 6 and Error!
Bookmark not defined. of this manual for details.
Flip the main power toggle switch (#4, Figure 8) 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) 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), 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.
8.2
Setting Wedge Temperature
Watlow EZ-Zone Controller (4 button style)
The EX-Zone temperature controller has a dual display. The current wedge
temperature set point is displayed on the right side of the display. The actual wedge
temperature is displayed on the left side of the display.
To adjust the wedge temperature set point, press the up arrow button to increase the
set point or the down arrow button to decrease the set point. (Refer to the Welding
Speed/Temperature
temperature settings).
Watlow 935 Controller (3 button style)
To display t h e current wedge temperature set point, press and hold t h e blue
"set" button located on the temperature controller. To adjust t h e set point,
press up or down arrow buttons while holding down the "set" button. (Refer to
the Welding Speed/Temperature Chart, Appendix A, for recommended
wedge temperature settings).
Pro-Wedge VM-20 Operator's Manual
Chart,
Appendix
A,
for
recommended
wedge
Page 18
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