On Tuesday 30 April 2013 12:52:04 jeremy youngs did opine: > gene > this is what jon offers and i am salivating over :) > http://pico-systems.com/osc2.5/catalog/product_info.php?products_id=26
I can see why, but two things: The minimum PWM freq of 25khz, and the 12 volt enable. I don't have any 12 volts in my boxes that isn't busy running fans. And LCNC can't make a PWM at 25KHZ. Best it could do, on an atom board, would be a 12.5 khz square wave. So I'd have to put some other card into there to generate that high a repetition rate pulse. The 4 channel universal at $250, while no doubt nice, is too much for my toy budget. > > i figure if using rectified line voltage it would give about 3 hp out of > my 2.5, with fan to cool it and would only need an isolation > transformer for safety, once i am back in m o this and a mesa card will > be my next upgrade > The controller card that amazes me is the one in the HF micromill. Very stiff speed control, and once I had replaced the junk hexfet it came with due to blowing it, (with one snarfed from a defunct PC PSU whose specs looked suitable) has been absolutely bulletproof. That motor would never draw that much current, but with the hexfet replaced with a 20 amp rated one, I can't see but what I couldn't drive a 10 amp motor with it. That thing is tiny compared to most and generates very little heat on its own. Cheers, Gene -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! My views <http://www.armchairpatriot.com/What%20Has%20America%20Become.shtml> A diplomat is a man who can convince his wife she'd look stout in a fur coat. A pen in the hand of this president is far more dangerous than 200 million guns in the hands of law-abiding citizens. ------------------------------------------------------------------------------ Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET Get 100% visibility into your production application - at no cost. Code-level diagnostics for performance bottlenecks with <2% overhead Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap1 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
