Here's our simple solution for the spindle encoder: http://www.anderswallin.net/wp-content/uploads/2008/06/encoder.jpg
It's a US-digital encoder which is mounted to a U-shaped bracket which is bolted to the fan-grill on the back of the AC-induction spindle motor. There was a thread on the end of the motor axis, so we extended the axis with a piece of threaded rod. The axis coupler is a piece of plastic tubing. We use an Omron Varispeed V7 VFD which does a decent job of keeping up the torque even at low RPM. With a 1.5kW spindle motor which is 1:1 coupled to the spindle it is possible to rigid-tap M2 through M6 holes in aluminium at 500 RPM. I would not try much bigger taps or tapping in steel with this small machine. Anders > I have just completed the conversion of my HERMLE 801 to EMC2. Rigid tapping > was the last function to implement. From my experience you need an encoder > coupled to the spindle. I used a simple but reliable encoder made by CUI > (AMT102, www.cui.com). ------------------------------------------------------------------------------ Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
