Hello Sebastian. I missed that. That would easier to do, since I can modify the step lenght to use the duty cycle I want.
Controlling the velocity to vary the frequency, that seems pretty doable for me. The frequencies that I need to handle are from 10 Khz to 50 Khz, so that would no be a problem I guess for the software step generator. Another thing that I would like to handle with hal would be a PLL, this is a Phase locked loop, some of the guys here could explain a lot better than I what is this, but basicly what it does is to compare two phases to adjust the frequency to stay always in resonance, this is the case of the circuit for induction heating. This would be easy to do with some combinational logic, but the reading of the timing between the phases that would need some progamming I guess, I need to read more about this so I can figure out what I need to do. Thanks as always and I hope this could be done because it would be a great help. 2013/2/7 Sebastian Kuzminsky <s...@highlab.com> > On 2/7/13 15:04 , Leonardo Marsaglia wrote: > > I was thinking and this is the hardest part. Would it be possible to > > control the induction heater using signals coming from and to LinuxCNC?. > > The basic thing that I need is a Square wave generator, that outputs 2 > > signals one at 180ยบ from the other, and with a duty cycle less than 50%. > > This is to avoid complications with the switching transistors. I'm almost > > sure that hal could do this, even read the signals to adjust the > frequency. > > > > Maybe a stepgen component in quadrature mode? That would let you easily > control the frequency of the output signal. > > http://www.linuxcnc.org/docs/2.5/html/man/man9/stepgen.9.html > > > -- > Sebastian Kuzminsky > > > ------------------------------------------------------------------------------ > Free Next-Gen Firewall Hardware Offer > Buy your Sophos next-gen firewall before the end March 2013 > and get the hardware for free! Learn more. > http://p.sf.net/sfu/sophos-d2d-feb > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- *Leonardo Marsaglia*. ------------------------------------------------------------------------------ Free Next-Gen Firewall Hardware Offer Buy your Sophos next-gen firewall before the end March 2013 and get the hardware for free! Learn more. http://p.sf.net/sfu/sophos-d2d-feb _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
