On 10 August 2011 07:52, Tobias Gogolin <usert...@gmail.com> wrote: > Thanks Andy, these keling servos are sweet, how do I drive them?
Which ones are you looking at? Brushed or Brushless? How do you want to drive them? The Keling page suggests that they work well with Gecko and Rutex drives. For example you could use http://www.geckodrive.com/g320x-p-28.html With the DC servos, and use step-dir pulses from a parport to drive them. That doesn't normall give you closed-loop in EMC2 though, but using velocity mode step generators, it can be configured to be. Pico systems do a range of parallel-port connected drivers (using the parport for data, not step pulses) and have drives for both brushless and brushed servo drives. http://www.pico-systems.com/motion.html Mesa also do a range of solutions, but all need a driver board that plugs into the parallel port (7i43 $80) or PCI port (5i20, 5i22, 5i23 $200 and up). You then plug in a daughter-board to drive the motors. The 7i39 ($150 for two axes) would be a good fit for the Keling NEMA 23 brushless motors. They have a range of drivers for brushed motors too. Driving brushless motors can be a bit complicated... I suspect that all servo solutions will be rather more expensive than your original eBay Stepper solution, probably twice as expensive. The NEMA23 servos probably won't work particularly well direct-coupled to ballscrews, you will need to trade their much higher speed for somewhat lower absolute torque, probably with a toothed-belt drive. -- atp "Torque wrenches are for the obedience of fools and the guidance of wise men" ------------------------------------------------------------------------------ uberSVN's rich system and user administration capabilities and model configuration take the hassle out of deploying and managing Subversion and the tools developers use with it. Learn more about uberSVN and get a free download at: http://p.sf.net/sfu/wandisco-dev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
