On 26 September 2014 19:52, Condit Alan <[email protected]> wrote:
> Do you use a relay to reverse the spindle motor? With the appropriate hal > connections (and possibly support circuitry) one could use the dir line to > control a DPDT relay. I actually have a little board with a couple of ULN2003 chips on it, controlled by the 7i43, and use those to set "on" and "dir" for the VFD. There is also a channel that swaps between the mill motor and lathe motor, as the same VFD drives both on the dual-purpose machine. (The board is actually plug-configurable to allow any GPIO pin to use the input and output buffers. I have no idea why I bothered, I have never changed the configuration. I am not sure if your 7i42 has the "oomph" to drive a relay. The 7i37 might have been a better choice. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto ------------------------------------------------------------------------------ Meet PCI DSS 3.0 Compliance Requirements with EventLog Analyzer Achieve PCI DSS 3.0 Compliant Status with Out-of-the-box PCI DSS Reports Are you Audit-Ready for PCI DSS 3.0 Compliance? Download White paper Comply to PCI DSS 3.0 Requirement 10 and 11.5 with EventLog Analyzer http://pubads.g.doubleclick.net/gampad/clk?id=154622311&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
