Jon, Does your VFD have provision for an external braking resistor? Might that help with the over heating?
Ken On 5/9/2010 6:36 PM, Jon Elson wrote: > Hello, all, > > I just added a DAC for spindle speed control to my Bridgeport. For > years, I just had forward and reverse contact closures to the VFD and a > manual speed pot. Now, I have a DAC channel from EMC to the VFD. I can > start the spindle with an MDI entry like M03 S2500, but when I try to > start the spindle with F9, it sends the spindle forward contact closure, > but the DAC had been reset to zero. > > Is there a way to make the F9 key use the last spindle speed setting? > > (In other results, I have been doing a bunch of rigid tapping on 2-56 > and 6-32 holes. The only problem I had was finding out that my $8 > spiral-flute taps are not good for deep holes. They bind up. A spiral > POINT tap goes through like butter. 1000 RPM for 2-56, 800 RPM for 6-32. > My only problem is all the reversing makes my VFD get overheat alarms, > even with a fan on it. I probably need to get a bigger VFD.) > > Jon > > ------------------------------------------------------------------------------ > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Kenneth Lerman 55 Main Street Newtown, CT 06470 203-426-3769 ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
