Ed Fanta does rigid tapping on his CHNC. I don't believe that he has a breaking resistor on the VFD even. IIRC I watched the output of the SPINx1 and it just goes from a + voltage to a - voltage and does not "stop" he does have a fairly high line count BEI(?) encoder on the spindle.
It works very well for him and he taps at surprisingly high spindle speeds! On 02/02/2017 09:29 AM, Jim Craig wrote: > On 2/2/2017 9:13 AM, John Thornton wrote: >> I also have an Automation Direct GS2 on my BP knee mill and rigid tap >> with it (need the braking resistor). >> >> JT > John, > > That is an interesting point. I am getting ready to add gear tooth > sensors on the bull gear so I can rigid tap. I don't have a braking > resistor on my drive. Currently the mechanical spindle brake engages > when the spindle stops via a pneumatic cylinder. To be honest I am not > sure if it would engage during a spindle reversal as I don't do that > currently. It probably would not. Does the rigid tapping cycle stop the > spindle or does it do a reversal without stopping? M3 M5 M4 M5 or M3 M4 M5? > > I figured that the drag from tapping would stop the spindle pretty > quickly without the resistor. I would like to hear more about your > experience with this situation. > > Thanks, > > Jim > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users >
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