On Sat, 10 Apr 2010 17:16:35 -0500, you wrote: >There seems to be a limit as to how fast one can drive a printer port for >stepper control. Has >anyone thought of making a PCI-E board for very high-speed I/O? Just where is >the bottle neck?
There is a limit, but you need to ask yourself "what speeds and resolution do I REALLY need?" For instance, I have a router, a mill and a lathe, all CNC, all run off parallel port. Both the mill and lathe are quite capable of running reliably at 3.5m/min (137 inches per minute) and have a resolution of +/- 0.005mm (0.0002 inch). Acceleration values are around 500mm/sec/sec for the mill and 700 for the lathe. The router will do 6m/min (236 inches per minute) but it's only accurate to +/- 0.01mm. Acceleration is around 900mm/sec/sec. All are more than adequate to do their respective jobs reliably within acceptable tolerances at a respectable speeds. Steve Blackmore -- ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
