Your setup sounds very much like my Anilam setups. Tach feedback to drives, encoder feedback to controller, +&-10V velocity command signal from controller to drive. I used a Mesa 5i20 ($199) and 7i33 ($69), I also use a 7i37(69) for I/O. I was originally looking at the Motenc Lite card but the Mesa hardware saved me a good deal of $ and works great.
RogerN ----- Original Message ----- From: "Gerhard Pircher" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Wednesday, September 05, 2007 5:46 AM Subject: [Emc-users] Need advice on building a mill controller with EMC2 Hi, I'm seeking for some comments about how to build a mill controller with EMC2, as I'm completely new to this topic. I got a 12 years old desktop mill, which was manufactured by KERN- Microtechnic [1]. The machine is in a very good condition, but some parts of the original mill controller (a rack mounted controller manufactured by NUM) are missing and most of the documentation is lost. Thus it was not possible to get the old controller operational again and EMC2 seemed to be a reasonable alternative to a commercial product. First a few technical details about the desktop mill. It should have a resolution or 5µm, whereas switches allow to detect the point of origin and Haidenhain rulers deliver a quadrature signal for relative position measurement. The mill is equipped with Faulhaber DC servo motors [2] for the X/Y/Z axis, which are coupled to tacho-generators [3]. I thought about using VitalSystem's MOTENCLite PCI [4] card. It's analog outputs should drive a DC servo amplifier [5] through a standard +/-10V interface. The tacho-generators will be used to regulate the velocity of the DC servo motors, which is set by EMC2 (the servo amplifier implements the closed loop control). Three of the 4 quadrature inputs of the PCI card will be connected to the Haidenhain rulers [6] and the generic digital inputs will be used for the switches to detect the point of origin. Since I don't know much about EMC2 yet, I would like to know, if my (early) concept is feasible and what should be considered when building a mill controller with EMC2. It would also be nice, if a MOTENCLite user can share his experiences with this card. Thanks in advance! regards, Gerhard [1] http://kern-microtechnic.com - German only [2] http://www.faulhaber-group.com/uploadpk/e_3557C_DFF.pdf [3] http://www.faulhaber-group.com/uploadpk/e_2225_DFF.pdf [4] http://www.vitalsystem.com/web/motion/motionLite.php [5] http://docs-europe.electrocomponents.com/webdocs/020f/0900766b8020f51d.pdf [6] http://www.heidenhain.de/wcmsmimefiles/208_961_24_16952.PDF, page 44 -- Ist Ihr Browser Vista-kompatibel? Jetzt die neuesten Browser-Versionen downloaden: http://www.gmx.net/de/go/browser ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
