Electrical shapes goes crazy

[bones]

Hi,
   The other day I was cutting some DB9 holes in a box. The first two went fine and then the third went crazy.
It started on the straight cutting away but when it came to the corner, it kepts going straight and then started doing some squigles.
So I lifted the head off the job, reset the Z axis and restarted the job.
It was like watching a little kid with a crayon. Zipping around randomly. You could see it on the cutting screen in mach3. Weird.
I thought it might of been because of the lastest version, so I went back to the locked down version of Mach3. Still doing the same.
So that night I tried it on a mates machine. The gantry nealy flew off the end of the router. No where near where the DB9 hole was surpose to be.

Any idea's guys? It might be worth looking into as it looks like an issue.
Here is the code below.

Cheers
Rodney

(Code by Newfangled Wizard, 18/04/2008)
(Program Posted for Aluminum )
G0 G49 G40.1 G17
G80 G50 G90 G98 
G21 (mm)
(****DB 9 Pin****)
M6 T3(TOOL DIA. 3.175)
 G43 H3
M03 S2000
M9
G0  X0 Y3.5154
X0 Y3.5154 Z2
G1 X0 Y3.5154 Z-2 F150
G41  P1.5875 X0.442 Y5.2019 F300
G3  X-0.7315 Y5.4991 R2.46126
G1 X-8.001 Y5.4991
G3  X-10 Y3.5001 R1.99898
G1 X-10 Y1.6002
X-12.3977 Y1.6002
G3  X-13.9979 Y0 R1.6002
X-12.3977 Y-1.6002 R1.6002
G1 X-10 Y-1.6002
X-10 Y-3.5001
G3  X-8.001 Y-5.4991 R1.99898
G1 X8.001 Y-5.4991
G3  X10 Y-3.5001 R1.99898
G1 X10 Y-1.6002
X12.3977 Y-1.6002
G3  X13.9979 Y0 R1.6002
X12.3977 Y1.6002 R1.6002
G1 X10 Y1.6002
X10 Y3.5001
G3  X8.001 Y5.4991 R1.99898
G1 X-3.2715 Y5.4991
G3  X-4.445 Y5.2019 R2.46126
G1  G40 X-4.003 Y3.5154
G0  X-4.003 Y3.5154 Z2
G0  X0 Y3.5154
X0 Y3.5154 Z2
G1 X0 Y3.5154 Z-4 F150
G41  P1.5875 X0.442 Y5.2019 F300
G3  X-0.7315 Y5.4991 R2.46126
G1 X-8.001 Y5.4991
G3  X-10 Y3.5001 R1.99898
G1 X-10 Y1.6002
X-12.3977 Y1.6002
G3  X-13.9979 Y0 R1.6002
X-12.3977 Y-1.6002 R1.6002
G1 X-10 Y-1.6002
X-10 Y-3.5001
G3  X-8.001 Y-5.4991 R1.99898
G1 X8.001 Y-5.4991
G3  X10 Y-3.5001 R1.99898
G1 X10 Y-1.6002
X12.3977 Y-1.6002
G3  X13.9979 Y0 R1.6002
X12.3977 Y1.6002 R1.6002
G1 X10 Y1.6002
X10 Y3.5001
G3  X8.001 Y5.4991 R1.99898
G1 X-3.2715 Y5.4991
G3  X-4.445 Y5.2019 R2.46126
G1  G40 X-4.003 Y3.5154
G0  X-4.003 Y3.5154 Z2
M5 M9
M30

[Ron Ginger]

If it ran two cutouts fine, then the gcode generated is obviously OK and the wizard is out of the picture. Mach is simply running gcode.

My guess is that some other software- anti virus, auto update etc, took off in the background and confused the mach engine. Or other noise issues drove the motors nuts.

Can you get it to do that again and try to figure out exactly what conditions exist when it happens.

[vmax549]

ROn I have also seen strange things from the powerfeed wizard. It will reset the feed speed by itself, it does a crazy dance before it takes off on an X feed, sometimes it does a huge zstep not as programmed.

I stopped using it after a big crash with a 5" diam cutter. I never knew where it would go at the next feed

(;-) TP