Author Topic: Mach 3 lathe post front/rear tool post problem  (Read 3573 times)

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Offline mike^3

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Mach 3 lathe post front/rear tool post problem
« 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?

Offline BR549

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Re: Mach 3 lathe post front/rear tool post problem
« Reply #1 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

Offline mike^3

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Re: Mach 3 lathe post front/rear tool post problem
« Reply #2 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

Offline RICH

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Re: Mach 3 lathe post front/rear tool post problem
« Reply #3 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

Offline mike^3

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Re: Mach 3 lathe post front/rear tool post problem
« Reply #4 on: August 10, 2015, 07:49:39 AM »
Thanks rich, I'm trying to get the threading to work now lol,

Offline RICH

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Re: Mach 3 lathe post front/rear tool post problem
« Reply #5 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

Offline mike^3

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Re: Mach 3 lathe post front/rear tool post problem
« Reply #6 on: August 10, 2015, 08:27:50 AM »
Thanks RICH! Hows Mach 4 lathe coming along?

Offline RICH

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Re: Mach 3 lathe post front/rear tool post problem
« Reply #7 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

Offline MF2D

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Re: Mach 3 lathe post front/rear tool post problem
« Reply #8 on: May 01, 2017, 12:56:48 PM »
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!
« Last Edit: May 01, 2017, 01:02:31 PM by MF2D »