Hello, At least with my machine, holding the tap accurately is not an issue. It is a CAT40 size spindle, and I use good quality collets that that have the square hole at the bottom that the square end of the tap fits into. They use in insert to compress around the shank that is like a really short DA style collet. I have found that the series of taps I buy from Guhring are very precisely aligned between the threads and the square end, so it is just a matter of aligning the text on the side of the tap with the + side of the collet (or using any similar procedure to make sure that the taps are inserted onto the collet with the same orientation, and fully bottomed out against the point at the back end of the tap) and it comes out in exactly the same place every time. This seems to be true even with the smaller taps such as the M2.2x.45 that I am using on my current job (which taps 384 holes per operation). If you are having issues with your taps moving in the collets, I would suggest that you need to think about using better suited or better quality collets. The problem I have with my machine is that the spindle motor is 65 horsepower, and unlike the computer and servos, it is not on a UPS. Sometimes when there is a power surge, it causes the spindle controller to fault, so even though the power is back on, the spindle coasts to a stop. I just need a good way of dealing with this. Today, I am going to use a combination of the controller fault output and the spindle RPM compared with the near function to drive the motion.feed-inhibit pin and see how this works. -Neil-
On Tue, Mar 29, 2016 at 1:40 AM, Gene Heskett <ghesk...@wdtv.com> wrote: > On Tuesday 29 March 2016 03:25:55 Neil Whelchel wrote: > > I agree with 90% of that. Restarting the operation here at the > WOWElectronics shop has generally not been practical because the tap has > slipped in the chuck, or the whole chuck holding the tap has turned in > the boring bar type holder I use to hold taps on the carriage of my toy > lathe. I lack the ability in a tap holder to grab the square rear end > of the tap in a tool holder and positively prevent its moving. If I had > that problem solved, and I drive the tap to the starting position in my > G33.1 wrapper, then a rehoming of the lathe should put it close enough > to restart the hole if the spindle faults because the tap is bigger than > the spindle can do w/o bogging down. Editing the wrapper for a smaller > peck so it doesn't trip off again of course. > > Cheers, Gene Heskett > ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785471&iu=/4140 _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
