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Question about "probe" input
« on: March 09, 2020, 10:25:10 AM »
Hi everyone,
First time I write, although I am always reading the forum.

I am new with the topic of mach3, I have read a lot but I still have things to study,

I want to understand a little more about the "probe" input since I have a CNC bulleri with automatic tool change, however, I still can't make that recognizes the offset of the tool change, I Enter the tools and measurements and when I change the tool number, it is perfect, it changes the data and the zero point of the tool; but if the previous tool has a smaller measurement than the new one that you select, the Z axis still goes down to the previous position, and trips over the material.

How do I tell the Z axis to go up to a safe position before changing tools? Should I do it manually?

Offline Graham Waterworth

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Re: Question about "probe" input
« Reply #1 on: March 09, 2020, 05:59:41 PM »
You need a G43  for the tool offset to be used and a G49 to cancel any active tool offset.

%
G21 G40 G00 G49

N1 (10MM END MILL)
G54 G00 G90 G43 X0 Y0 Z10. S1000 M3
Z1. M8
G01 Z-1. F100.
Etc.
G00 Z25.
G91 G28 Z0 M6
M30
%

« Last Edit: March 11, 2020, 08:15:57 PM by Graham Waterworth »
Without engineers the world stops
Re: Question about "probe" input
« Reply #2 on: March 10, 2020, 07:44:42 AM »
Hello Graham !!

Thank you for the answer, so i need to write a macro for the tool change like you send me. Sorry, I know there are many questions, I am new in all this.

i don´t understand much about macros, but i will try to do something like what you tell me

Quote
G21 G40 G00 G49

N1 (tool 1)
g54 g00 g90 g43 x0 y0 z10. s1000 m3
z1. m8
go1 z-1. f100.
Etc.
g00 z25.
G91 G28 z0 m6
m1

Offline Graham Waterworth

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Re: Question about "probe" input
« Reply #3 on: March 11, 2020, 08:11:48 PM »
This is not a macro this is a small sample of g-gode showing the use of the G49 and G43 command.

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