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25/11/2019 at 17:12

Okay thank you. I’ve read all the info about the conversions and am very impressed and extremely grateful. The strange thing is Knives 1,2,3 are the only ones that don’t have the same dimensions as are listed in the blueprints, even in Dave’s files. The ones in Dave’s files are 84.5mm x 104.38 mm while
the blueprints say 120×120. Every other file except those three knives is spot on. I downloaded Dave’s files back in September so maybe he updated them before September but not the blueprints.

I’ll have to look into the shredder mods forum.

Just FYI, if you have access to CorelDRAW (you can get a free 15-day trial), they open the original files from Dave. And then you can tell it to convert to inches. No math, no fuss 🙂 Just save it as inches and send it to your cutting machine.

Thank you! I’m going to buy steel this week and get to cutting this weekend. Wish me
luck ❤️

25/11/2019 at 03:25

I’m confused about a couple of things with the posts here… Someone posted that they sent the CAD files to be cut with the price points for each piece.

Knife 1 = is 3.89″ x 3.89″
Knife 2 = 2.76″ x 4.36″
Knife 3 = 2.89″ x 4.72″

This is confusing to me because the original blueprints say that Knifes 1, 2, and 3  are all 120mmx120mm, which implies they are square.

I figured when olivier did the original conversions, maybe he didn’t keep them square.  That’s fine.

The extra confusing part now is when I import the Knife 2 drawing, for example, for some reason the original size is 84.5″ x 104.431″… and when I keep the image proportional, then change the width to 2.76″, the automatic height becomes 3.397″.  I am wondering where conversion came from to A) no longer be a square, and to B) be so far off from the stated 4.36″?

Thank you in advance for any explanation on this.  I just learned how to cut metal and was going to start officially cutting the pieces, but then this really stumped me.

20/11/2019 at 00:58

I’ve taken steps here in San Diego to get this process going – taking a class tomorrow to learn how to plasma cut the parts for the shredder… Many people have told me that laser cutting is better, but I do not at this moment have access to a laser cutter suitable for metal.  People have also informed me it might be wise to farm out the blades… but… well… I quite enjoy learning how to do new things.  Especially because it might inspire some ideas for other future projects.

Wish me luck!
And if there’s anyone in San Diego looking to help build a shredder from scratch, look up @preciousplasticsandiego on Instagram and shoot us a DM (not sure how messaging works on this website).


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