I have a G0704 mill (known "up here" as a King Canada KC20-VS) that is being CNC'd, with only one real issue cropping up.
The spindle speed control - original is a 4.7k pot, the spindle circuit board is a "copy" of a KBIC 120 style board. With the 4.7K pot in place, I measure 4.14v across the outer leads. With it removed, the circuit board shows about 11.9v. When I connect up to the 7i76, the voltage drops to 1.89v. No matter what I do (not that I'm an expert in this config) I can't get anything other than 0.0v out of the 7i76 spindle out. Does the 7i76 draw more current (twice as much, approx) as a 4.7k potentiometer? If so, I might have an "out": The KBIC board allows for "voltage following" with an external 0-7v supply leading to one of the leads for the potentiometer, and one of the field wiring connections; maybe this board will act the same. Anyone know if what the 7i76 is doing is correct? Thanks - JohnS. ------------------------------------------------------------------------------ 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
