Hi all, I am hoping you lovely peeps can help me deciding whether to purchase the Snapmaker 2.0 now or better wait for further developments. I am new to CNC machining so forgive my incorrect lingo.
The objects I work with are sections of metal parts from car panels, which are covered with anywhere between 35 to 200 layers of paint in different colours (see cross section image bottom left). The paint layers vary in thickness from 10-40 microns thick. The metal on which this all sits is around is 600 microns.
If at all possible, I would like to CNC on these curved shaped pieces, for example as shown on the sculpture in the picture - top left and close up at the top right. With this piece (20x5x1cm) I carved into the paint layers manually with a handheld rotary tool (Dremel), which took me about 40 hours, just for the carving alone. I am hoping to be able to do other pieces and shapes with the Snapmaker 2.0, resulting in more geometric and precision shaped cuttings, and more importantly, saving me time and my sanity!
For the cutting / carving itself, plunging a couple of millimeters deep seems to be no problem for the Snapmaker, or any CNC machine for that matter, but is it also possible to ‘shave’ off say about 5-10 microns at a time, over a distance of a few centimeter? In other words, peeling off layer-by-layer, tapering down (as in bottom right in picture)? I currently do this with handheld (power) tools or by hand, but with the layers being as thin as a human hair, it doesn’t take much to cut too deep and expose the next layer.
There’s a lot I have to learn! So far to prepare and get into it I have installed Luban and Fusion 360 on a Mac. I did find a similar question in this forum:
But here I got stuck as things are still a bit over my head. I don’t fully understand the relation yet between the software packages, what all the ‘codes’ are, how to overlay the tool path over the 3D scan data etc. but first and foremost I try to understand if this is possible at all before I spend my hard earned money.
In summary my most burning questions are:
- Which ‘point cloud’ file format is the best and how to import it into Luban
- How does Luban know (or how do I let it know) the position of my object on the board - angle, height etc. so it starts at the right coordinates?
- The pieces I use don’t have complex shapes so I guess a simple 3D scan app will do the trick like Qlone, Scandy Pro or Heges. Trnio is also an option I guess.
- Is there a way the CNC module (in combination with a camera or sensor) can pre-scan the stock / object on the table, which seems (to me) an obvious feature to have, also for ‘flat’ objects, which aren’t always perfectly flat. Or is this an add-on / feature yet to come?
Totally understand if my question either don’t make much sense and or are in the wrong order but any pointers much appreciated!
ps 1. on my website are more works with the same material www.marcvellekoop.com
ps 2. happy to help anyone here with questions related to (automotive) surface finishing, sanding, cleaning, prepping, paint application, polishing etc. Metal and composites are my forte, wood less though but ask me anyway.