Setting Weld Speed - Demtech Pro-Wedge VM-20 Operator's Manual

Rev. F, December 2020
8.3

Setting Weld Speed

To set weld speed, use "+" and "-" buttons on speed setting pot (#2, Figure 8) located on
top of control box, next to temperature control unit. Keep in mind that the three-digit
number on the speed setting pot does not relate directly to feet or meters per minute.
(Refer to the Speed Setting versus Actual Travel Rate Chart, Appendix B, for
setting versus feet per minute values).
Note on High/Low Gear:
set in low gear, which gives the welder a speed range of 0-18 feet per minute (0-5.5 meters/min).
You will use this range for most all in-field geomembrane welding applications and especially
ones that require high torque such as HDPE. The main motor drive sprockets on the Pro-
Wedge can be flipped to change the ratio to high gear, changing the speed range to 0-32 ft/min
(0-9.5 meters/min) for high speed seaming of thin materials and non-woven geotextiles. Speed
versus setting values are listed for high and low gear in the speed-setting chart in Appendix B.
Pro-Wedge VM-20 Operator's Manual
Unless otherw ise specified, your Pro-Wedge has been factory
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