The motherboard is a PCchips PC23A: http://www.pcchips.com.tw/PCCWebSite/Products/ProductsDetail.aspx?DetailID=370&CategoryID=1&DetailName=Feature&MenuID=44&LanID=0
The cable is IEEE-1284 compliant, Jon you gave me a part number from Digi Key? and that is what I bought, so I am sure that is right. The PPMC card are connected to the PC by parallel cable Jon you may remember back when I was using linear scales I had a problem with jitter on all axes and once in a while the Z axis? would spike. See some Halscope images about that here: https://sites.google.com/site/bmklawt/home/pid-tuning The consensus here on EMC back then seemed to be it was a grounding issue, This is when I bought the parallel cable you recommended, you sent me a new updated IC chip and I isolated the PPMC cards from ground. The spiking eventually stopped, I have no idea what I did. Jitter never stopped which is why I switched to rotary encoders. I have run a few programs cutting air as it is configured now and it seems to work fine it's just the DRO does not match actual movement, as it sets right now 1" of actual travel is about .010" off of DRO reading on each axis, I'm still playing with the INPUT_SCALE numbers. This is driving me nuts, Bruce From: Jon Elson <el...@pico-systems.com> Subject: Re: [Emc-users] PPMC.ini, Help with my math To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Date: Monday, February 25, 2013, 12:32 AM Bruce Klawiter wrote: > > I tried this but as soon I run POS the numbers start scrolling on the page, > is this correct? It is SUPPOSED to just keep overwriting the same line. it may be if the terminal window is too small, it will scroll instead, or it may be a different terminal window program or a setting that is causing that. > it will even do it when the encoders are disconnected. > See a screen shot here:https://sites.google.com/site/bmklawt/home/emc2/pos > OK, you definitely have a communication problem, the one-line huge jumps in position indicate fairly frequent errors between the PPMC and the PC. > Also did a com test: https://sites.google.com/site/bmklawt/home/emc2/commtest > And, this test confirms bursts of bad communication. Are you using a cable marked as IEEE-1284 compliant? What kind of PC are you using? It it connected to a motherboard parallel port or a PCI plug-in card? Oh, and DO NOT try to enable servo drives when the reading of encoder position has these problems. Jon ------------------------------------------------------------------------------ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_d2d_feb _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
