On 2/8/2015 2:01 PM, Gene Heskett wrote: > > Yes, I am a Certified Electronics Technician. And I like to teach. And > being both 80 yo, and long retired myself, I do consider the costs in > the long view if I can.
Thanks Gene. I'm a loooooong way from an electronics technician. So, if you're willing to teach, I'm certainly willing to listen. > > They will be happier, with the drivers running cooler, and the motors > may have much better high speed torque when those caps are big enough > and fresh. > > Be aware that some switching supplies are not at all happy driving a > stepper due to the high recirculating currents causing what the switcher > thinks is an overvoltage, tripping it off, so its recommended by > great-grandpa Gene here, to isolate the switcher from the load a wee > bit with a small power resistor, .5 ohms or less, and a large, low ESR > capacitor which will serve as the recycle currant container for most of > the voltage spikes that are part and parcel of todays stepper drivers. I agree with your earlier thought. I don't think these are switching supplies. > > All of my drivers are looking at 10,000 uf or more at their input > terminals, and the switchers then seem to behave well with the extra cap > to gobble up much of that noise. > > Cheers, Gene Heskett ------------------------------------------------------------------------------ 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
