![Huh ???](https://www.machsupport.com/forum/Smileys/default/huh.gif)
I've been having problems when running a program, putting it into single block near the end of a contour, it has taken off. It did it with mach 2, now I'm running mach 3 v1.9.081.
Heres the program:
O0001(11-18)
(T1 = .25 ENDMILL 2FL H1 , D1 )
N1
T1 M06 ( TOOL - 1 .25 ENDMILL 2FL )
M01 (PUT T1 IN SPINDLE)
M08 G04 P1000
G54 G0 G90 X0. Y0. S6000 M03
(WATCH OFFSET ON OFF)
G43 H1 Z.1
G1 Z-.1 F8.
G41 D1 X-.011 Y-.0064
X.0127 Y-.0475
G3 X.19 Y0. I.0823 J.0475
X-.19 I-.19 J0.
X.19 I.19 J0.
X.0127 Y.0475 I-.095 J0.
G1 X-.011 Y.0064
G40 X0. Y0.
Z-.2
G41 D1 X-.011 Y-.0064
X.0127 Y-.0475
G3 X.19 Y0. I.0823 J.0475
X-.19 I-.19 J0.
X.19 I.19 J0. X.0127 Y.0475 I-.095 J0. **
G1 X-.011 Y.0064
G40 X0. Y0.
G0 Z.1 M09
M05
M30
It took off in the line ending with **
I had run it twice in single block mode and it worked fine. When I cut metal, it took off, see picture. After that happened, I was unable to recreate the problem.
What can be happening here? I've scrapped several parts by this happening. It's always an arc at the end of a contour when in single block. I like to put it into single block at the end of a contour when running for the first time to make sure of the retract, etc.
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