On Fri, Aug 20, 2010 at 11:47 AM, Jon Elson <[email protected]> wrote: > Igor Chudov wrote: >> My old control box was, well, old and slow and had only 512 MB of RAM. >> >> So, I bought a bunch of parts on Newegg to build a small PC based on >> "Mini ITX" motherboard (really small, to fit into tthe cabinet). >> >> I put Ubuntu Lucid on it and installed EMC2 with a shell script from >> linuxcnc. >> >> After the installation of the new computer, most things work, however, >> Z axis following has gone to HELL and instead of under 0.001, it is >> something like 0.026 (sic). >> >> Adjustment of P and I helped a bit but it is still above 1. >> >> This is on a Bridgeport Interact 2 mill. >> > OK, the first thing is to run the PPMC diagnostics, and prove > communication between PC and PPMC boards is OK. There is commtest, > diotest and dactest to test bidirectional data transfer to all 3 > boards. If that is OK, then you want to run the EMC2 latency tests > while "abusing" the system, do some web browsing and run glxgears and > move, obscure and reveal and resize the window. If none of these make > any difference, then go back to the old system and carefully check all > your configs files for any difference. > > Another possibility, of course, is that while you were working on the > computer, something happened to the machine itself. Never rule anything > out. And, of course, try reverting to the old computer to make sure it > still behaves as before.
Jon, I have two computers side by side and can switch from one to another easily by just replugging all cables. In fact, I will have to take the new computer down, due to the fact that the memory that I bought for it had one bad memory stick (note that the stick was detected by me and not in use at the time of the test that I reported). But I have to return both memory sticks to Newegg to get a replacement. The change that I was making to the machine yesterday, prior to placing in the new computer, was to inhibit the drives when EMC2 is not controlling position. It seemed to work correctly on the old computer, however. I will switch back to the old one tonight due to memory issues, anyway, but I will report back when I get replacement memory in a week or two. i ------------------------------------------------------------------------------ This SF.net email is sponsored by Make an app they can't live without Enter the BlackBerry Developer Challenge http://p.sf.net/sfu/RIM-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
