On Mon, Aug 9, 2010 at 7:40 PM, Greg Bentzinger <[email protected]> wrote: > The Hurco KM3P has a setup somewhat like Igor's. > > In the KM3P (P denotes programmable spindle speed) there is a small 3ph motor > with a worm gear which drives the shaft where the crank handle would be on > your average BP type mill. > > There is a Voltac card which reads a single prox switch which counts the back > gear teeth - much like Jon E.'s home built integrated encoder to determine > actual speed (but not direction). The Voltac card outputs to two separate > contactor units which drive the speed adjustment motor fwd or rev. > > The Hurco software tests spindle speed after an Sxxxx change or tool change > and it is surprisingly accurate for a control originally based on a 8086/8087 > dual bus system. (I have the Max32 upgraded boards with the awesome power of > Intel 80386/80387 processors!) Mine will set the no load RPM to within +/- > 7rpm but usually the error is under 2rpm. This tach setup allows the machine > to near rigid tap. The tension/compression holders I have only have about > .050" range of movement. > > The fact that the KM3P uses such a strange control scheme was one reason I > have not considered changing to EMC2 for that machine. If I got my hands on a > regular KM3 I would definitely to the "upgrade" to EMC2 because it allows > easy expansion for adding a 4th axis.
greg, if I get my script to work and change speed, then you could use something like that, too. i ------------------------------------------------------------------------------ This SF.net email is sponsored by Make an app they can't live without Enter the BlackBerry Developer Challenge http://p.sf.net/sfu/RIM-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
