Andy has already done that.. https://youtu.be/fo7SwanH50I
On Mon, Jul 13, 2020, 8:11 PM Gregg Eshelman via Emc-users < [email protected]> wrote: > Running it like that should make it possible to cut teeth on thread taps > with relief. Thread it 'lumpy', mill out most of the chip grooves, harden > then grind to sharpen. Used to be mechanical drive attachments for some > lathes to move the cross slide in and out for cutting threads for taps. > > On Monday, July 13, 2020, 11:59:28 AM MDT, Chris Albertson < > [email protected]> wrote: > Actually making a hex head on the lathe would best be done using a > microcontroller. FPGAs can compute trig functions but I think the method > used is to first implement a "soft CPU" and then run code written in C that > uses math.h That is a silly-expensive why to replace a $5 STM32 chip. > > But really, the Lathe spindle does not run so fast and you can write this > code as a HAL component that runs in the Servo loop. I wanted out how I > would do this last night and was stumped on the math until I remembered the > law of cosines and "SAS" triangle problems from some class I took in the > 10th grade. Look those up on Wikipedia and then it is not hard to > computer the cross slide position as a function of spindle angle. > > The hard part is getting such a good cross slide setup with no play of > backlash > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
