Marius Liebenberg wrote: > Jon > Do you care to elaborate on the diode encoder? > Down at the bottom of this page is a link to a pdf file with the schematic. http://pico-systems.com/pendant.html
This one encoder X, Y and Z, feedrate and spindle overrides. The diodes convert the single pole switch so it creates a binary code, which is then decoded in the HAL file. I have HAL files linked there for two versions. The UPC pendant file matches the schematic, the PPMC pendant is a bit different, it has 4 axes before the spindle and feedrate settings. These connect to the digital inputs of my motion control boards, which require a sinking-type switch. In a case where the contacts need a voltage source, the diodes would be reversed. The whole purpose of this is to save digital inputs. On the UPC/Minimill setup, I had already used up all my encoder counters, so I interfaced the MPG also through digital inputs, and was running very short. The multiplexing allowed me to have 5 or 6 selections (axes plus overrides) as well as 3 rate selections with only 5 wires and 5 digital inputs. Jon ------------------------------------------------------------------------------ Get 100% visibility into Java/.NET code with AppDynamics Lite It's a free troubleshooting tool designed for production Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://p.sf.net/sfu/appdyn_d2d_ap2 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
