On 22 April 2014 17:24, Florian Rist <fr...@fs.tum.de> wrote: > So, first question: Can I hook up the 7I39 to a BeagleBone Black. Well > of course I can, but is this somehow supported already, so that it is > simple to do? Any other driver suggestions?
The problem here is that the 7i39 expects a three-phase PWM signal, and I don't think that the BBB PWM code (if there even is any for the PRU) has a three-phase mode. You would have a simpler task either using something that drives Mesa cards (PCI or parallel) and a Mesa FPGA card, or using the BBB ethernet to drive a 7i90 (I am not sure this works). Alternatively the Pico PWM brushless servo amp only needs a single channel of PWM: http://www.pico-systems.com/acservo.html Any number of off-the-shelf drives from the likes of AMC are likely to be able to drive your motor Both the Pico and AMC drives are likely to need Hall sensors on the motor. If you need to you may be able to "fake" these with the bldc HAL component. > 0. move to home position (0°) > 1. wait for low frequency trigger, a hardware or a software signal > 2. within say 10° accelerate and synchronises to the 50Hz trigger > so that the 10° position is reached 20ms after the last trigger > and at a given speed (specified in degree per trigger pulse, > not in seconds as the pulse rate of the trigger may change slightly) > 3. keep on moving at the give speed (in sync with the trigger) for 100° > 4. decelerate an move to a safe position This sounds like fun. It might "just work" with a G33 or G33.1 synchronised move, or it might need an elaborate system of PIDs and PLLs. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
