On Tue, 2012-05-01 at 23:48 +1000, Peter Homann wrote: > You run it at a couple of RPS. Its the speed where you notice that its smooth > rather than silky smooth. :) > > Then adjust the pot to get it as smooth as you can. > > Cheers, > > Peter.
I suspect, and I may be way off base, the 2 RPS (assuming a standard 200 step per rev motor) puts the step rate just above the micro-step to full step transition and the potentiometer adjusts an output shape that eases the transition. In case it might indicate the G540 capabilities, there is a Xilinx XC2C32A with 32 macrocells, LM324A opamp, LM339DG comparator on each driver board, as well as IR2104 bridge drivers. My Bandit controller had a half-step to full-step feature too. I didn't bother trying to figure out how to add this to LinuxCNC because I'll be using servo's in the long run (someday?). I suspect a variation of the three-phase component could be used with a pair of h-bridges to make a very smart (as smart as the programmer) stepper driver. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
