> I traced to interference from > > the spindle motor - this was in spite of having suppressor How did you trace that? oszillosope? The problem came out of the blue. I have a hard time to believe it is from this, I did not change the mill. >>>>>>>>>>>>>>>>>
Purely observation Chris, At first everything worked OK for about a year, then I started to get a spate of broken cutters and realised that the z-axis was very slowly drifting downwards during a cut. I put a dial gauge on a magnetic base on the table with the plunger under the z-axis and watched it both with the spindle running and with it not running. When it ran, the z-axis moved down about 10 thous a minute - in my case, on very small work, this was enough to quickly break sub-1mm carbide end mills. I only passed this on as a possibility - your case may be different but your situation is most probably caused by electrical interference either at a frequency within the normal operating frequency of your axis motor or at a multiple of it which is producing a beat frequency. I suppose that if you measure the speed at which the axis is moving when it should be stationary, you should be able to work out the frequency of the interference and maybe use that information to track down the cause.... Best wishes, Ian ___________________ Ian W. Wright Sheffield UK ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
