Mesa has their THC board that I believe does exactly what you are looking for.
Look at the very last item on this page: http://www.mesanet.com/ Dave On 3/8/2012 10:46 PM, Scott Hasse wrote: > I'm doing some volunteer work for a local hackerspace (sector67.org). We > recently completed conversion of two anilam knee mills to LinuxCNC, including > adding a 4th rotary stepper axis for one of the mills. We now want to do > some simple plunge EDM'ing, and ideally would reuse the LinuxCNC z axis > control. > > Although I could make a custom control loop, I'm thinking that a simple > conditional/looping gcode program, looking at the value of an analog input > (m66) to determine whether to move up, stay in place or move down should get > the job done in the regular axis GUI (with perhaps the addition of a pyvcp > panel for a simple status). > > My question is about this analog input. I used A Mesa 5i23 card with servo > and isolated I/O daughter cards, so I have ample digital I/O. Has anyone > used a circuit with a voltage to frequency converter (LM331 or similar) to > create a digital pulse train read in linuxCNC as an encoder I presume and > then hooked that up to the analog m66 inputs? > > Looking for advice on that specific problem or other ideas on solving the > overall problem. > > Thanks much, > > Scott > > > > ------------------------------------------------------------------------------ > Virtualization& Cloud Management Using Capacity Planning > Cloud computing makes use of virtualization - but cloud computing > also focuses on allowing computing to be delivered as a service. > http://www.accelacomm.com/jaw/sfnl/114/51521223/ > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
