5 ms·
I milled a test block in wood to check the accuracy, and it was sub-millimeter accurate. I can't measure further than that as my tools doesn't allow it. But I d
by mfi 5y ago
I milled a test block in wood to check the accuracy, and it was sub-millimeter accurate. I can't measure further than that as my tools doesn't allow it. But I doubt that it's super accurate due to the 3d-printed parts, aluminium instead of steel etc.
- wolfram74 5y agoBeing a spherical cow loving physicist, I still get caught off guard by what counts as "precise" in engineering contexts. Even when I'm making stuff in meat space I don't think I've ever bothered to intentionally get better than 1% relative precision.
- sokoloff 5y agoFor a framer, 1/8” is precise enough. For a finish carpenter, 1/32” is precise enough. For a 3D printer, 0.004” is precise enough. For a machinist, 0.0005” is precise enough.
- curtain 5y ago0.004" is read as "four thou", and 0.0005" as "five tenths", as in five tenths of a thou, FWIW. I only picked up imperial thanks to binging This Old Tony videos.
- sokoloff 5y agoIf you enjoy https://www.youtube.com/c/ThisOldTony https://www.youtube.com/c/ThisOldTony, you might also enjoy https://www.youtube.com/c/Clough42 https://www.youtube.com/c/Clough42 https://www.youtube.com/c/Blondihacks https://www.youtube.com/c/Blondihacks and https://www.youtube.com/user/JohnGrimsmo https://www.youtube.com/user/JohnGrimsmo
- mNovak 5y agoUnless it's PCB, in which case its "4 mil", as in milliinches, among the great bastardized units
- ggcdn 5y agoBeing a structural engineer, I usually think the same way. But then I started tinkering with 3D printers, built a MPCNC, and have since busted my share of endmills due to accuracy and repeatability issues. Being off by a fraction of a mm is enough to bust your tool or mess up the workpiece.
- Harbour66 5y agoHello! I have seen your question about the the pf3cmp file of the perform-3D .Have you solved the problem? Cause i have the same question right now.Thank you very much.
- whatshisface 5y agoIt really depends on what you are doing and what 1% means. For example, a tiny ridge on a sliding surface will result in a noticeable catching of the slider down to even visually imperceptible heights.
- dekhn 5y agoIt's worth reading the various recent articles about the construction of ASML's machines that make next-gen chips. LIGO, and diffraction gratings are two other nice examples. It's basically the culmination of thousands of years of humans getting better at precision. Things didn't take off until the 1700s, really got amazing around WWII, and has undergone amazing results since then.
- kragen 5y agoThere's a long way to go still. Nothing in your house is made to LIGO precision, not even your own body, the spiders, and the bacteria in the toilet, which are all a lot more precise than next-gen chips.
- dekhn 5y agoyou're misusing the term precision to apply to size. Precision doesn't mean anything in bacteria.
- kragen 5y agoI meant precision, not size. Bacteria build their proteins with ribosomes, which assemble the proteins with atomic precision (about 100 femtometers). LIGO is built with several orders of magnitude tighter tolerance than that, but none of the parts of your computer are even that precise.