I installed ubuntu-emc2 on a 733 MHz Dell machine with very little trouble. a 2.4 Gb disk isn't big enough, no surprise. Also, the install CD won't run with 128 MB of memory, but once the install is done, that is plenty. I can't even see any slowdown when compiling EMC2.
I got homing working on all 3 axes of the Bridgeport, but there seems to be something odd about that. The way I have the home switches wired, the ppmc pin feeding directly to axis.0.home-sw-in reads TRUE when the switch is NOT tripped, going FALSE when the switch is pressed. I have the HOME_SEARCH_VELOCITY and HOME_LATCH_VELOCITY set to negative numbers, although the axis seeks home in the positive direction. It all seems to work, but it seems like the sign of the search velocity should match the direction to move to seek home. Is this because I have the polarity of the switch backwards? Sometimes when homing the Y axis, it will get a following error and go to ESTOP-RESET. I get no dialog box on the screen, like with a normal following error, but I get a message in the terminal window. (It seems this method of homing, which abruptly zeroes the encoder counter with no warning, is kind of extreme.) I suppose slowing down the home_latch_ velocity will get rid of this. I did have the Y axis run away at high speed one time and I had to hit the ESC key. Due to different signal qualifiers on the reset-count-on-index and the index-detected functions, it is possible for the counter to not reset when the index-latch says the index has been seen. This could be considered a bug in the FPGA that needs to be fixed, depending on how the driver handles the condition. I seem to be getting a dialog box that contains a normal logging message that the ppmc driver writes so it will get into the /var/log/messages file. I noticed a bunch of lines as EMC2 sarted up about error message flags. I didn't get this dialog box with BDI. So, is there an error mask that needs to be set differently to keep these messages off the screen? I haven't run a real CNC program on this yet, but I did cut metal for a couple hours today with manual and MDI commands. After I get these mounting plates for my PWM servo amps bent, I then have to drill and tap them, so I will be running G-code through it. The worst part of the whole experience was downloading the updates necessary for compiling EMC2 and a few other things I need on the system from us.archive.ubuntu.com, which is appallingly slow! I was averaging about 3 K bytes a second! But, I finally got it done. So far, so good! Jon ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
