Quote:
Originally Posted by Akash Rastogi
I'm creating a simple manufacturing workcell that autonomously places sheets of aluminum into a dye and then pneumatics come down to just bend the sheets. What I wanted to use the lead screw and a motor for is to have a custom made vice run on a bed (much like a vice would on a mill) to come forward and make sure the sheet is positioned correctly but I don't know how to set up the lead screw to do this. Also which motor should I use to have the sheet of metal positioned quickly using the vice and screw?
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First, Pneumatics are not a good choice for bending metal, you cannot get the power required. Hydraulics are the better choice. But, that's not your question.
To use the leadscrew as a positioning element, you first need to create the system that drives the leadscrew - for example a window lifter motor. Then, you need a system to know the exact* position of the nut on the screw. Using a PID loop, you drive the motor until it is in the desired location.
*Exact is relative. 0.001" is hard to do with a quadrifilar leadscrew, 1/8" should be possible.
For repeatable. low-load positioning, you should consider pneumatics. Use an adjustable end stop on your mechanism to set the exact spot to push the material to. That also actuates a switch, which makes the hydraulic press come down onto the die and do whatever you want. Then another thingus comes up and pulls the workpiece off while a new one is being put on.