Can someone separate each individual shredder component and put them each in a seperate .step file? and then post them here? Thank you!
The Precious Plastic Kit contains a folder with the Fusion 360 files of the shredder. You can open it and extract all the .step files you need.
Folder path: .\precious-plastic-kit-master\3. Build\Shredder\CAD files
here is a btw. frame design which enables more rigidity, mobility, ease to build, adjust-ability, forgiveness as well safety (height, fall from 40cm, mass center, transport by 2 people over stairs,…).
please use at least 4cm x 4cm x 3 or 4 mm beams and for the shredder mount at least 10mm thickness, it’s on all purpose. over time, the frame has to pick up lot’s of errors from the components, ie: hexbar shaft sides not true to each other; shredder driveshaft (hexbar) not aligned to shredder box, shredder driveshaft not aligned to motor driveshaft, couplings not fitting perfectly, motor misalignment, name it. also the holes on the shredder side-plates should be 11mm; horrible to do since it’s stainless, requiring you a pretty strong drill-press.
hey @plastacs, we didn’t forget you! After carrying all the building experience, issues, expert recommendations/reviews, footage on how to build and fix this thing, etc … from the last 12 months about @davehakkens shredder together, we realized our effort to fix this beast is going beyond any sanity. We and experts think this piece of crap is not just a waste of time, resources but also just a bad invest (considering the 2K you have to pay for something so la la), we decided to focus on a regular and more build friendly design as the v4 team does now too.
Nonetheless, we left the issues here : https://precious-plastic.org/library/machines/shredder/. We add another dozen of bullet points there this days…
@plastacs, at worst you can use sheet gauges, it’s a common technique to line up things in your case, if it’s 1mm, you can use 4 pieces a 0.5 mm or whatever needed to keep them nicely aligned (adjust blades clearance).
yeah, knowing the blade sheet thickness to re-design/adjust the laser files is the only real way I know for ‘beginners’, The nominal of 6 mm end up usually with a thickness of 5.90 – 6.05 or worst. That way you can add or adjust the washers with the missing distance to fill up those 149 mm. But extending the 3mm front and back plates to fill might worth investigating too.
good thinking with the drawings btw. ! saves a lot of time and money
pp.org : yep, that’s a new site coming up, stay tuned
seeya in a bit
@pporg That’s great that you found a way to avoid the countersunk bolts – such a mission without the right equipment, I was very lucky that an experienced machinist offered to do it as a favour but I don’t feel lucky calling on him again. My assembly seems to stack up with 149mm distance, and as you seem to be saying I’ll have to back it up onto the bearing carefully to get the alignment. Will take another look at your post when my head is clearer – thanks for sharing
At uni they insisted that we draw the entire assembly before sending even one part for manufacture. I can see now that this does save time in the long run since the 2.1 drawings have incorrect quantities on! I’ll do my best to open source my drawings – I don’t imagine many hobbyists will have Creo but this is the student edition so may be useful for our students next year and any others using this package.
Do you run precious-plastic.org? It’s a nice site, starting to make things clearer for people.
@plastacs, here you go. as said this only really goes well by having a lathe around. when those sleeves are accurate, it helps also a lot to adjust all during assembly, which is also kinda big mystery to me
however, you’re kinda lucky, in our builds we have only space for 14 blades, others even 13 only. I kept bouncing my head against how this possibly can be compensated with the washers or housing and whatever we tried we did end up with a so lalla la working shredder pre-programmed for obsolescence or pre-mature death of blades due too much play, blades scratching, misalignment, etc… … and so we end up with making custom 2 sleeves on the lathe, for each side, one side will push a little against bearing, and the other against the hexbar (acting as shoulder here), you can’t really apply pressure that way but at least it keeps things tight and fit for quite a long time without too much trouble over time. let me finish the page and upload a link here this tomorrow .
I hope we get some feedback in the next weeks from others in the PP community how they did deal with the magic blade Nr. 15, I guess it’s a free easter egg in our workshop we started hanging them on the wall, soon we can make an entire shredder from those
Thanks @pporg, I’m not convinced it would be worth the trouble either but have been wrong before.
I’m assembling the version 2.1 shredder in Creo 5 at the moment. Where’s the best place to make the files available? I will open up our Google Drive where we are documenting everything but not many people will find that through our website.
I realised my own mistake so withdrew this post but couldn’t delete it.
Hi @alexleone did you get anywhere with the parametric CAD?
@plastacs seems rather difficult, i tried this for our production, to compensate the tolerances of sheet thickness, etc…
Does anybody know if there’s anyone working on the shredder CAD files to parametrize it in a way that the user just have to put the sizes of the materials in a form like screen, and fusion 360 redimention everything itself? If someone is doing it, please let me know as soon as I’m starting doing it tomorrow cause I haven’t found it here, and will be a waste of time redoing stuff. I keep you folks informed!
Thanks it’s wath I want
I leave in Canada, and i want to realize this kind of project, and i need Shredder\CAD files, is it possible to have it?
Thanks for your help