What wire sizes and types does the Multimatic 255 support?
The Multimatic 255 supports multiple wire sizes including .023/.025 inch (0.6 mm), .030 inch (0.8 mm), .035 inch (0.9 mm), and .045 inch (1.2 mm). The machine uses different drive roll types depending on wire composition: V-Grooved rolls for hard wire, U-Grooved rolls for soft and soft shelled cored wires, U-Cogged rolls for extremely soft shelled wires, and V-Knurled rolls for hard shelled cored wires. Drive roll types may be mixed to suit particular requirements.
From the official Miller Multimatic 255 Multi-Process Welder manual, page 12
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