On May 25, 2011, at 9:54 AM, andy pugh wrote: > On 25 May 2011 14:37, Tom Easterday <[email protected]> wrote: > >> We are really about to give up on the 320X and buy Granites. > > Are those step-direction drives?
Yes. > The general advice in the EMC2 world is to buy totally dumb drives and > do all the PID inside EMC2. Then you can tune in software, and use > Halscope to watch what is happening. Hindsight is 20-20 ;-) > The Mesa 7i29 is $150 per axis (2 per card) and two of them can share > an FPGA card header. So 2x 7i29 connected to a 7i43 connected to the > parport will give you a very capable system which is a big upgrade on > a step-dir parport system (apart from anything else you then have an > extra 24 GPIO pins to play with) Hmm, at the time we bought components (11/2010) I asked Peter Wallace about using the 7I40 but he pointed out that the current limit was only 10A and we needed more. He said it was unfortunate that Mesa didn't have a beefier solution for us. I don't recall seeing the 7i29 at the time and Peter didn't mention it. I originally wanted to use a Mesa solution as I was very satisfied with the 7i43/7i47 I have on my mill. > > However, the 320X really ought to work on Y if it works on X. Have you > tried a motor swap? I am wondering if there is a faulty commutator > segment. It will be a big PIA to try another motor, but it may come to that. Thanks, -Tom ------------------------------------------------------------------------------ vRanger cuts backup time in half-while increasing security. With the market-leading solution for virtual backup and recovery, you get blazing-fast, flexible, and affordable data protection. Download your free trial now. http://p.sf.net/sfu/quest-d2dcopy1 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
