Dave Caroline wrote: > hmm do I have to bring forward the repair to my HP 3562A dynamic > system analyser? > it has a couple of channels and a driving noise source > Actually, I think you could do it with LinuxCNC. Just rig a hardware step generator in velocity mode to a constructed HAL signal source. You could run a slow square wave generator through a multiply to set the magnitude of the disturbance. Then add this to a constant velocity that is run through a limit component to create a velocity ramp. Apply a load to the motor with a friction brake or dynamic load (PM motor driving a big rheostat). Ramp up the speed, then increase the disturbance until the motor stalls. Perform the test at several different dynamic loads and then repeat the set at different speeds, and you should have a very informative plot.
Jon ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. This 200-page book is written by three acclaimed leaders in the field. The early access version is available now. Download your free book today! http://p.sf.net/sfu/neotech_d2d_may _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
