On 2/8/2015 1:11 PM, Dave Cole wrote: > > I'm wondering why they are failing on you? > Do you have the drives heat sinked? The back of the drives are smooth > aluminum and are designed to be > heatsinked to a backplane or the heatsink that Parker sold (use heat > sink compound).
Hi Dave: Yea, I have the drives heat sinked to a 1/4" alum backplane with compound and have the backplane fan-cooled. I've never noticed the backplane even being warm to the touch. As far as why....well this last one was partly my fault. But I'm surprised that the Parker didn't have some built in protection. I had just built and was testing a new Linuxcnc box based on an oldHP Compaq DC7600 Pentium 4. Along with the new build I added code to do the touch-off plate. Well, being careless while I was testing, I ended driving the Y-axis to its neg stop. Once I unstuck the axis, the drive was toast and just sat there and vibrated the axis. DUMB! The other failure was about two years ago and it just didn't wake up when I started the machine that day. > If you break the drive to motor electrical connection while the motors > are energized that will oftentimes kill the stepper drive. > I would not pay $280 to have those drives repaired. Jon is right, the > Geckos offer similar performance for less. > The Parker drives show up on Ebay periodically for reasonable and > unreasonable prices. > > At one time Parker was selling these drives for about $750 each. But I > think that Gecko and Leadshine has been tough competition for Parker. > > I've used the Gecko 203V drives myself and have used them on industrial > machines. But the Geckos need to be heatsinked as well. > > You can run with mixed Parker/Gecko drives on your machine. The > machine won't care. I use the same timing parameters for the Geckos as > I do the Parker 750's. > > Dave > > > > > --- > This email has been checked for viruses by Avast antivirus software. > http://www.avast.com > > > ------------------------------------------------------------------------------ > Dive into the World of Parallel Programming. The Go Parallel Website, > sponsored by Intel and developed in partnership with Slashdot Media, is your > hub for all things parallel software development, from weekly thought > leadership blogs to news, videos, case studies, tutorials and more. Take a > look and join the conversation now. http://goparallel.sourceforge.net/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ Dive into the World of Parallel Programming. The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
