Topics

1

General Mach Discussion / Radius comp in 4th rotary axis

« on: February 02, 2009, 06:54:57 PM »

Hello all

I don't know if a couple of you remember me or not but I make automatic screw machine flat cams on my BP with Mach3.
I use a rotary table 4Th axis.
Now I would like to use radius comp with the rotary  but with the rotary I use degrees for its movement because that's the way cams are made and
read.
I need to or would like to setup for using radius comp with my 3/16 carbide end mill using the degrees of the rotary as the comp part.
The other axis used is X & of course Z.
The X controls the diameter or radius of the cam and the rotary turns the degrees.

So, can this be done or is it my pipe dream ? Lil

Mach3 has been flawless for several years now. Started out with Mach2.

2

General Mach Discussion / Wild Rotory

« on: February 21, 2007, 08:10:50 PM »

Weird problem.
I have 4 axis BP all Geckos and Breakout board. Mach 2.

Now I mainly cut screw machine cams on my machine using the rotary table. I have cut several hundred of em so I know all works great normally.
Now last night, I was milling away on my last cam of the set and when she got up to the larger radius it started "taking off". By that I mean its like someone put in a F200 or almost G0. There went that carbide end mill.

Since then, I have not been able to figure out why. The arc rises all work perfect and the dwell cuts (rotary A cuts without an X rise or fall) run smoothly.
Its only when the A axis movement is bigger like 15° rotation and the X axis movement is like .0025".
Now these movements are very common  in my line of work. Just generation on the screw machine parts. I have cut hundreds of these.

Prog below..........
(S1038   )         
(  TOOL 5 Cam )         
(STAR SJ-8R)         
                  
G90                  
G1     Z0            F100   
G1   A20.            F200   
G1   A0      X   1.112   F80   
G1   Z-2.5            F100   
G1   Z-2.650            F5   
M01                  
Z-2.800            F3   
Z   -2.960   F2         
Z   -3.020   F1         
G91                  
G1               F40                     
N   99   A   25   X   1.0685   
N   518   A   19.42   X   0.0024   
N   520   A   15.76   X   0.0048   
N   522   A   12.75   X   0.0843   
N   524   A   47.42         
N   88   A   20   X   -1.16   
N   599   A   219.65                           
                  
            G90      
            G1 Z0  F100      
            G1A380X3.5F200      
            G0 A360      
            G92 A0      
            M30      

Any help will be greatly appreciated.

                  

3

General Mach Discussion / Subroutine problem

« on: February 11, 2007, 10:43:05 PM »

Ok, so I feel like a dummy here but.......I seem to be unable to get a subroutine program to run. it just runs through the main program and thats it.
What am I missing?

Main program

1004
M98 P9999 L2
M30


Then the sub program is

O9999
G20 G90
G0 X1.5
G0 Z-.500
G1 Z-.650 F100
G0 Z0
X1.0
M99

Both progs are saved as the same name as the first line in ea.
So what am I missing? I am using Mach2 Version 6.11i   (Licensed )

Scott