Roll feeds generally have two rolls mounted on top of each other, which are set to pinch the material between them. As the rolls rotate, material is advanced through the die in the amount at which the feed is set. Roll feeds are activated by servomotors or mechanisms attached to the crank shaft of the press. These are set to rotate the rolls the required amount to advance the material through the die.
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Knowing and appreciating the craft of metal fabrication - by Tim Heston The recipe for precision metal fabrication includes technology and craft. We hear a lot about the technology, but not so much about the craft.
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