I am trying to come up with an approach to incorporate EMC into replacing an antique CNC (Bandit II) on a Bridgeport. The current setup uses stepper motors and I would use the existing power supply and motor drivers which use a quadrature input into onboard opto-isolators. Consequently, I will need to configure EMC to provide these signals (if possible) and make use of 2 parallel ports(if possible) in order to have enough outputs to provide:
Output signals into existing opto-isolators: 15 X enable Y enable Z enable Xa1 Xa2 Xb1 Xb2 Xab return Ya1 Ya2 Yb1 Yb2 Yab return Za1 Za2 Zb1 Zb2 Zab return Inputs: 3 total +XYZ limit -XYZ limit XYZ home I would pull the existing card cage out of the current chassis and put a PC's inards in its place. That is power supply, PCI motherboard, hard drive, cd rom drive, flash memory stick via USB port or floppy for data transfer. I know how I can interface the machine control panel with the PC keyboard. Would try to find a small laptop type display panel for the screen. My questions : 1. Can 2 parallel ports be used to accomplish this. 2. Where in EMC is this configured? 3. How would one configure EMC to provide quadrature drive signals? 4. Will the parallel ports drive the opto-isolators if I provide pullup resistors? 5. Which version of EMC is the most appropriate for this task? 6. Can BDI be used for this? If I can't use this approach then I would have to provide additional quadrature conversion circuitry, and opto-isolator drivers. Jack Ensor ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
