2012/3/9 Scott Hasse <scott.ha...@gmail.com>: > > 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?
I have it for nozzle-height-control. I have no way to check now, what exact model of voltage to frequency converter chip was used, but You are right - the pulses were treated as an encoder signal and then "actual encoder velocity" was compared to a requested value in THC module and Z position was adjusted. It does not make sense to me to feed the pulses in encoder module and then hook the encoder module output to m66 analog input pins. M66 will expect the pin to be either true or false, that is not going to happen with encoder output pins. I think that something like a comparator is needed, which compares the actual encoder signal with some preset value and then drives its output true or false. It would be a very simple HAL component with less than 10 lines of code. Let know, if You do not know, where to start. Viesturs ------------------------------------------------------------------------------ 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
