Bart Libert (EducaSoft) wrote: > Dear guys (and possibly girls, why not) > > I have a question which may sound quite newbie, but I can assure I'm > not newbie at all (just newbie in this matter :) > > I am currently building a laser cutter machine and for that I will > need to be able to output pulses between 25kHz and 50kHz (50kHz would > be the max but would be nice to be achievable) > > Now I tried this with EMC on a very high end machine I have here (A > Dual Xeon quadcore machine on a serverboard) and emc is aproximately > capable of doing it. > Mesa and Pico Systems (me) have boards that generate step pulses and/or pulse width modulated pulses in hardware. The Pico Systems Universal Stepper Controller can generate up to 300,000 steps/second on each of 4 axes simultaneously. The timing of the steps is programmed (by LinuxCNC) in 100 ns increments, so at 50,000 steps/sec (50 KHz) you have a granularity of 1/2 %. Using software to generate step pulses, the granularity will be vastly higher, and this can lead to stalls of stepping motors. By relieving the computer of the load of making each step pulse, even a very low-performance computer plus the step generator board can run rings around your $4K machine.
See http://pico-systems.com/osc2.5/catalog/product_info.php?cPath=4&products_id=30 for more info. Jon ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
