Hi all. I am going to build an industrial quality knife-tool to cut cardboard, and I would like to ask you all for any advice, experience and warnings you might have. I'm in the need of a motor to oscillate a knife at a frequency of 200-300 Hz, with a stroke of 1.2mm +/- 0.6mm. The knife it self will probably weigh about 25 - 35 grams (the part the motor has to drive), depending on the outcome of the final construction. Would it be best to use two solenoids to achieve push and pull, or would it work with a combined push & pull function at this frequency? There is also the issue of heat; any parts should not exceed 50°C. I realize this could be a problem, but I hope some heat sinks will take care of this problem. Any comments? I also need to rotate this knife, this could be achieved by rotating the whole system, but it would be nice to combine push/pull and rotation into one motor. Do anybody know of such a motor in sale anywhere, that would meet the formentioned criteria? Any comments and suggestions is welcomed here!