Hi Andy, thanks for you comments. > Alternatively the Pico PWM brushless servo amp only needs a single > channel of PWM: > http://www.pico-systems.com/acservo.html
Ah, I see that would make thinks much easier. And I'm not forced to use the Beaglbone I could was well you a micro/nanoATX board and a MESA FPGA card. I'm jut flowing the Beagelbone news with interest and one day I'd like to use it - this might not be the right project. > 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. Oh, the motor has HAL sensors and 1000 CPR encoder and a 1:50 or so gearbox. >> 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. Hmm, not sure if its fun for me... :-) > It might "just work" with a G33 or G33.1 synchronised move, Oh, good idea, instead of syncing to a spindle speed I use my scanner signal. I'll think about it and see if I understand the idea and can map my problem to rigid taping. > or it might need an elaborate system of PIDs and PLLs. This is what I am afraid of and is even more complicated than a PLL as not only the phase (in this case speed) has to be correct but also a position. Is there something like a PLL component in LinuxCNC See you Flo ------------------------------------------------------------------------------ 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