On 05/30/2015 12:13 PM, Mark Johnsen wrote: > Stuart, Jon Elson, and John, > > Thanks for the feedback and that's why I posted here to get some feedback > before I went and did something crazy. > > Stuart - I'd love to see that Cinci in action someday
Try this : https://www.youtube.com/watch?v=mxxdq6y8z8M There are a few more videos of that machine. It is running with my interface hardware, I did a little servo tune-up on it a couple years ago. > > Jon - Backlash is a concern on my 1988-ish mill. When looking at Halscope, > the f-error plot is more jagged than John Thornton's f-error from his > tutorial Yes, when the backlash is taken up, it will cause a jolt as the motor suddenly has to accelerate the table from zero to whatever the current velocity is, and that will cause a discontinuity in the motion. > To your hobbyist point, I guess I'm trying to stretch the hobby part to > make some money from it when I quote rather simple mechanical systems. I > had a quote for qty 4 of a small part at $95 and I could easily make those > on the mill (maybe by hand) and they'd be good enough. So, I hope to have > some decent results, but w/ a used mill from 1988, I can only expect so > much. > I did a rather crummy retrofit of a 1938 Bridgeport manual mill with axis drives meant for a much smaller load. It works surprisingly well, though, and I can fairly easily turn out parts good to +/- 0.001" without great effort. Jon ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
