Machsupport Forum

G-Code, CAD, and CAM => G-Code, CAD, and CAM discussions => Topic started by: mike^3 on August 09, 2015, 07:40:29 AM

Title: Mach 3 lathe post front/rear tool post problem
Post by: mike^3 on August 09, 2015, 07:40:29 AM

hello!

When using my cnc lathe, that has a rear tool post with tool changer, I can't seem to get the gcode right for cutting.

Everytime I use the lathe wizard, it thinks the tool is in the front and posts that way, how do I change it to use the rear post?

I already tried to change the tool from front to rear im mach 3, still doesnt help, it still assumes that the tool is in the front.

Any help?

Title: Re: Mach 3 lathe post front/rear tool post problem
Post by: BR549 on August 09, 2015, 10:52:09 PM

HIYA Mike I have not forgot you dude I am trying to find someone that is more familar with turn to help you out. I am way too rusty on it to be of much help. UNLESS no one steps up THEN I will drag out the books and give it a whirl.

Hang in there, (;-) TP

Title: Re: Mach 3 lathe post front/rear tool post problem
Post by: mike^3 on August 09, 2015, 11:14:10 PM

I emailed ya it was the front and rear tool post selection, all must be front or rear

Title: Re: Mach 3 lathe post front/rear tool post problem
Post by: RICH on August 10, 2015, 07:41:41 AM

mike^3,

My lathe uses a front tool post and in the tool table they are all designated as front based on a master tool
touch off.
My experience is limited with using a rear tool post, but Hood has specific knowledge.

So,

As you said, "Do Not" mix  front and rear tool post in the tool table.

A good example is when trying to use a gang tooling setup as that could easily lead one to create tool offsets  as front and rear.
Someone posted a write-up called  "Lathe Gang Tooling G52 Offsets". Just thought I would make note of this for other readers
of the thread. Mixing front and rear designations is a recipe for problems.

Note that the X axis + direction is reversed for a rear tool post and if you check "reversed arc's in front tool post"
the motion of G02 and G03 is reversed.

RICH

Title: Re: Mach 3 lathe post front/rear tool post problem
Post by: mike^3 on August 10, 2015, 07:49:39 AM

Thanks rich, I'm trying to get the threading to work now lol,

Title: Re: Mach 3 lathe post front/rear tool post problem
Post by: RICH on August 10, 2015, 07:52:06 AM

Have a read of "Threading  on the Lathe" write up which you can find in Member's doc's.
Lot's of good info you should know before you go!

RICH

Title: Re: Mach 3 lathe post front/rear tool post problem
Post by: mike^3 on August 10, 2015, 08:27:50 AM

Thanks RICH! Hows Mach 4 lathe coming along?

Title: Re: Mach 3 lathe post front/rear tool post problem
Post by: RICH on August 10, 2015, 03:42:07 PM

Quote

Hows Mach 4 lathe coming along?

Don't know as I have not been following the development of Mach4 for some time now.

RICH

Title: Re: Mach 3 lathe post front/rear tool post problem
Post by: MF2D on May 01, 2017, 12:56:48 PM

Quote from: mike^3 on August 09, 2015, 07:40:29 AM

hello!

Any help?

I do it like this - open the program with texteditor and  in menu edit and
then  replace  X to X- replace. That's it!