On Thu, 2008-01-31 at 11:04 -0600, Jeff Epler wrote: > emc2 doesn't include any "serial protocol" drivers. You would have to > write the driver to do this yourself. > > The most important thing to know is that emc2 requires a new feedback > position at the servo rate (typically 1ms) and emc (not external > hardware) has to control when the feedback position is retrieved. > > The first DRO-with-rs232-output I looked at > (http://www.newall.com/DROs/c80_rs232.htm) has a maximum report rate of > 0.5 seconds per report, and the timing is controlled by the DRO, not by > the PC. > > I don't think that this source of position feedback is a good one for > emc. > > Jeff
Besides EMC or HAL would make a perfectly good, and less expensive machine controller or DRO with the scales alone. In thinking about scales again, one thought that came to mind is, EMC might make a good CMM (manual or powered). But I guess the real magic is in the granite slides, though errors could be mapped out. Which brings me back to the issue of accurate standards. Another thought, is there any value in having an RS-232 connection with serial calipers or micrometers? -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC lathe, Bridgeport mill conversion, doing XY now, Zubal lathe conversion pending) ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
