I think you should consider building a simple test slide, with guides, ball screw, servo, and a simple timing belt and pulley reduction. That way you can try different reduction ratios and encoder resolutions and measure the speeds you can get and how smooth the motion is.
I think you will find out the timing belt and a moderate reduction around 40 or 50 to 1 with a servo encoder in the (2500 to 5000) line count range will get you what you what you need. 5TPI * 50-1 * 5000 lines * 4quad = 5000000 counts per inch Or 0.0000002 inches per count Which at 0.00025IPM would be 1250 counts per minute or ~20 counts per second. One cheap way to get an idea of the motion smoothness would be a laser pointer swinging on a knife edge pivot and a lever arm hanging down that is being pushed by the slide. All setup on a good sized surface plate. Then just watch the spot on a wall 50 feet away. __________ Andre' B. Clear Lake, Wi. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
