Hello, im engeering student and Im looking for a book etc of shredder calculations scheme/algorithm or something like this. I have rotational speed and efficiency of this mechanism. Could anyone give me a tip or tell me where can i find some info about calculating "things" like this? http://www.compax.com/resources/images/gears.jpg http://www.hardenmachinery.com/photos/two-shaft-shredders.jpg

Hi Walker, In the absence of having literature on this subject, you could take your office shredder, and measure the current draw to the motor as you put the maximum number of sheets through - and so you would get the input power. You could measure the speed of the paper going through the rollers - and / or - you could count the revolutions of the shredding drums - and from the radius of the drums you could compute the force and torque - now that you know the shaft power (allowing for some motor inefficiency). You could repeat this test for a smaller number of sheets, to get more graph points. So you have now got some relation between total paper thickness and power and torque and speed. Hope this helps.

if i see from image, it's similar to paper shredder machine, for reference: calculation of its shredder, you can visit at paper shredder design i hopefully can help you. thanks