Wire Feed Speed for a Target Deposition Rate
The inverse of the wire-feed-deposition tile: the wire feed speed a target deposition rate needs, WFS = deposit / (60 x wire cross-section x 0.2836 x efficiency). A 6 lb/hr target on 0.035 in wire at 92% efficiency needs about 398 in/min; a smaller wire needs a much higher speed (rate goes as diameter squared). Answers 'what WFS to set' instead of the rate from a set speed. The WFS must be within the WPS-qualified range; the WPS and process govern.
Formula and source
Wire cross-section = pi/4 x diameter2; wire feed speed (in/min) = target_deposit (lb/hr) / (60 x area x 0.2836 lb/in3 x efficiency); melt-off = deposit / efficiency. The inverse of deposit = WFS x 60 x area x density x efficiency.
Wire feed speed for a target deposition rate - first-principles wire-volume geometry and steel density (0.2836 lb/in3), by name, solved for the feed speed; public domain.
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