Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: DICKEYBIRD on August 06, 2013, 10:53:00 AM

Title: Varying the chip load when threading?
Post by: DICKEYBIRD on August 06, 2013, 10:53:00 AM

Is there a way to "lighten the load" during the last 1/3 (approx) of threading  passes?  I'm using the simple threading wizard and find that if I choose a D.O.C. that works OK during the last portion of the run, the number of passes is excessive.  If I increase the D.O.C. the later passes get messy.

I have plans to add a spindle belt reduction system later to increase the available torque when threading but was curious if there's another G-code or other software solution to progressively reduce the D.O.C. as the depth increases.  If so, I'd like an egg in my beer as well please. ;D

Title: Re: Varying the chip load when threading?
Post by: RICH on August 07, 2013, 10:13:55 PM

Dickeybird,
Have a read of Threading on The Lathe - Mach 3 Turn which you will find in Members Doc's.
See section 5 page 27 and also see section 7 page 44. To help reduce the number of passes
increase the first pass and then used a different method of cutting the thread per the sections
referenced above.

RICH

Title: Re: Varying the chip load when threading?
Post by: DICKEYBIRD on August 08, 2013, 08:56:01 AM

Awesome Rich, thanks.  Go ahead, say it: "RTFM." ;D

Actually I did read it a while back but didn't clearly understand the implications of the details on pg. 44.  More study needed!

Title: Re: Varying the chip load when threading?
Post by: RICH on August 11, 2013, 11:30:57 PM

You asked for it ......
"RTFM"  :D ;D ;)

RICH