On 4/1/2014 9:32 AM, Peter Blodow wrote: > Am 01.04.2014 15:01, schrieb John Kasunich: >> 127 is an odd encoder count, but I understand why: >> 0.000393" is 0.01mm. >> >> I wonder if this mill was used to make metric parts >> and they wanted the control and readout to use >> metric units natively? >> > Until the early 1990ies, many lathes were produced in Germany with inch > screws and a 127 teeth gear wheel to drive them in order to end up with > metric threads. > Peter
My mill was at one point owned by AC Delco, so circa 1990 they likely were doing metric parts. The linear scales are 0.0004" resolution which could be 'close enough' to the Z axis' 0.000393" I have a small form factor Dell Pentium 4 with one PCI slot. Could add a dual LPT low profile card to it, in addition to the built in LPT and two RS232 ports. It has a video card in its AGP slot. Or I have a 3 Ghz LGA775 CPU Dell Optiplex GX520 SFF with only one PCI slot (GX520 is the "stripper" model with two DDR2 and one PCIe x16 slots unpopulated.) I also have three up-market mini desktop Dell Optiplex boxen with PCIe x16, one PCIe x1 and one PCI slot, two of them with an x16 video card. Only an LPT and one RS232 on those. ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
