http:// The FORSSTROM TDW HF welding / RF welding machine (5-25 kW) is one of Forsstrom's most popular models and has been part of our machine range for over 20 years. It is a large travelling machine with customised table length. There is 750 mm of free space behind the electrode. The HF welding table is equipped with a large trough for material storage. With its fast machine movement, the ability to pre-program welding cycles and the ability to switch the machine over to automatic welding, the TDW machine is suitable for large products with long, straight welds, such as tents, truck covers and billboards, as well as large-scale production.