I get much better thread form if I use the cross slide instead of the compound. I've changed the compound angle, changed inserts nothing seems to work better than using the cross slide.
Using the cross slide for Acme should cause no problems. The angle is much narrower than 60 degree threads. The cutter should probably be ground a little differently, though, so it does not rub on the trailing portion of the cut. Get your head deeply into both types of cuts and think about how the cutting tool is following the thread form with different tool advances.Acme as well?
Paul
Using the cross slide for Acme should cause no problems. The angle is much narrower than 60 degree threads. The cutter should probably be ground a little differently, though, so it does not rub on the trailing portion of the cut. Get your head deeply into both types of cuts and think about how the cutting tool is following the thread form with different tool advances.
Is that 5 degree on leading edge and 5 degree on trailing? ..........
That's it! Thank you.Lead angle= Arc tan( Thread lead/Thread circumference)
For a single lead screw, Lead= pitch Double lead, 2xPitich etc.
So
Lead angle= Arc tan( Pitch/(pi*pitch diameter))