On Thu, 2009-06-11 at 10:32 +0000, lesw...@gmail.com wrote: > Hello all have been reading a lot from your emailing, I going to start a > cnc router build 3 axis machine . Have lots of questions. Plan is to use dc > motors ¾ hp 1725 rpm motor with fincor 2250 dc controller. These were found > at scrap yard all work ok. Controller is using a 5k pot to control speed. > Will use a 1024 quadature encoder on the dc motor fan shaft. Would like to > concentrate on getting electronics up first > 1. What board is easiest to configure fort this. I am leaning toward a > Pluto or a mesa 7i 33 > 2. Will this work using the board to control a 0-10 volt control to the > 2250 on a pid loop it also has to have output for fwd rev and enable > 3. Will I need any other hard ware for now I want to be as cheap as > possible?
As other posts have indicated, there may be issues with using this type of controller as an axis controller. My guess is that this drive would be fine as a spindle controller, but make up a test rig and see what happens. If this controller doesn't have a transformer, but runs from the mains directly, like this one: http://www.wallacecompany.com/machine_shop/kbic/ be aware that the input signal is relative to the input "ground", which in this case floats relative to mains ground. So, if you set a voltmeter to AC volts, you will see a high voltage between the speed input and the metal frame of your PC or other mains grounded device. I measured about 50 VAC on mine (check DC while you are at it). This means that you need to keep the floating input, floating and isolated, and don't touch the input or you are likely to get a shock. Until you have the manuals and understand how the drive works, be careful, don't just hook something up to see what happens, have fun and let us know what you find out. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
