On Friday 29 May 2020 19:23:58 Chris Albertson wrote: > Let's say you had one of THESE https://a360.co/2RLRoxw (be sure and > try the "explode" control and slider. It is VERY impressive, no not > my work) and wanted to adapt it for use with LinuxCNC by adding > motors. > > So your first step is to replace the lead screw with a zero-backlash > ball screw and make mounts of the screw's nut on the carriage and > verify all the clearance. This is the entire point of 3D model is > as shown in the above link. I can verify the entire design before > making a part. I can answer questions like "where do the glass > slides go and how to route the cables?" I can add the slides to the > model and move the parts to verify clearances. > > How to do that with OpenSCAD? Can you even say things like "make > this new part to mate with that existing part" or must you make the > new part from scratch using measurements pulled from the existing > part? > > Motorizing the BS1 is EXACTLY this process, you start with a stock BS1 > then change out some parts, verify it all works then print and cut the > parts. You REALLY want the ability to test-fit and fix and have that > take about a minute at most. openscad is such an unusual and > specialized product I'd hate to recommend it for general design work.. > But it is good for making a single standalone parameterized part. > Like a gear but not a motorcycle or a milling machine. > In this case, openscad gives me the tools I want right now, and I could even do a set of gears for stage 2 of the reduction since that spacing is almost too close for a belt coupling. So by using the correct tooth profiles it could make a very usefull gearset, no belt at all, and a higher reduction at the same time. But would those teeth be strong enough. Worth a try IMO. And a swarf cover from the printer should be doable.
But I find that octoprint is part of octopi, which I have just now downloaded so now I'll need to obtain a 2nd 2G r-pi4 and basicly duplicate the hardware driving the Sheldon right now. I wasn't counting on that expense but. Apparently it talks to the printer with some software protocol I've not yet discovered. Hopefully it won't require another mesa card. Or I'm confused. At one point it was said I could take the .stl file to the printer on an sd card. Now you folks want me to buy another pi to do the slicing. plz clarify. I have the pi3b I took out of the Sheldon, and at the github page its says it will work, but the pi4 is many times faster than a 3. This fellow doing Octoprint, guysoft, came to the pi scene 2 years ago with the realtime-pi project, but about the time they got the new faster video drivers, dissappeared again, which is why I had to build my own preempt-rt kernel from scratch for the Sheldon. Then I couldn't just make a deb and install it, so I figured out how to make a 30 meg tarball out of the important stuff, installed that with a card reader, and its working great. 16 u-secs latency-test's. Thanks for any clarifications. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) If we desire respect for the law, we must first make the law respectable. - Louis D. Brandeis Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
