My weekend plans: Machining. @nvk @mattodell @k3tan @stephanlivera
@nvk @mattodell @k3tan @stephanlivera aaaand that's Saturday... CAM + Machining the front half. Done.
@esixtyone @nvk @mattodell @k3tan @stephanlivera !!
What CNC mill is that?
@pete @nvk @mattodell @k3tan @stephanlivera that would be the one I built from scratch. My "fuck this 2020 mainstream media + Covid crap" project. Amazing what you can do if you shut the noise off. It's 95% complete. Still a little final finishing to do, as with all good projects.
@esixtyone @nvk @mattodell @k3tan @stephanlivera Nice! What approach did you use? Like, CNC-only ballscrews or acme threads?
How accurate is it?
@pete made with basic tools, without a precision flat surface reference.... And I'm actually pretty amazed. I don't have a specific number but it is more precise than I need. Accuracy is as good as I can measure. Approach... Gantry. Steel. Designed for flood cooling, and rigid enough for working steel.
Currently using a little 2.2kw spindle. Upgrade incoming.
@esixtyone Damn, that looks really nice. And with proper cable trays and coolant!!
How did you mount those linear rails exactly? And what are they mounted on? You can get anywhere form decent to excellent accuracy depending on how you mount linear rails.
2.2kw? I guess that's not being run from a wimpy North American 15A plug... :)
@esixtyone Nice! That's definitely an easy way to do it. :) One other alternative is to mount the linear rails on a thin layer of epoxy (there's special high-dimensional-stability grades specifically for this purpose). The epoxy then takes up any imperfections in the base, allowing the linear rails to sit true and flat. But if you can get outsourced grinding, that's a much easier option.
@pete the biggest issue is not having a flatness reference. I've seem videos showing the rails are often a little off or bent. I was going to make a grinding jig.... But no reference.
@pete lol. We have real electricity in Australia. The frame is constructed from 6mm thick rectangular steel section. The gantry is 150x75mm channel, which was precision ground on the front face - my only outsourced job on this build. Its heavy stuff.