Not sure why it won't cut (SOLVED)

CrossFire ® PRO
1

Doing a project to cut three holes in a piece of alumnum sign blank. First two cuts are fine third one gets error when I hit retry cut, generate, start it cuts the third hole fine. What am I missing?
(v1.6-af)
(Machine)
( vendor: Miller)
( description: Plasma Cutting Machine)
G90 G94
G17
G20
H0

(2D Profile1)
G0 X9.5931 Y1.3408
G92 Z0.
G38.2 Z-5. F100.
G38.4 Z0.5 F20.
G92 Z0.
G0 Z0.04 (IHS Springback + Backlash)
G92 Z0.
G0 Z0.13 (Pierce Height)
M3
G4 P1.
G0 Z0.06 (Cut Height)
H1
G1 X9.7166 Y1.3598 F100.
G3 X9.616 Y1.4408 I-0.0983 J-0.0192 F100.
G1 X9.6035 Y1.4411
G1 X9.3949 Y1.4409
G1 X8.9775
G1 X8.5602
G1 X8.3657
G3 X8.3091 Y1.4259 I0.008 J-0.1446
G3 X8.2799 Y1.3802 I0.0615 J-0.0716
G3 X8.2659 Y1.3366 I0.4155 J-0.1574
G3 X8.3686 Y1.2379 I0.1006 J0.0019
G1 X9.6159
G3 X9.7166 Y1.3598 I0.0018 J0.101
H0
M5
G0 Z1.

G0 X14.4589 Y23.1824
G92 Z0.
G38.2 Z-5. F100.
G38.4 Z0.5 F20.
G92 Z0.
G0 Z0.04 (IHS Springback + Backlash)
G92 Z0.
G0 Z0.13 (Pierce Height)
M3
G4 P1.
G0 Z0.06 (Cut Height)
H1
G1 X14.3647 Y23.1002 F100.
G3 X14.5458 Y23.0513 I0.1253 J0.1045
G3 X14.4345 Y23.3604 I-0.0557 J0.1546
G3 X14.3645 Y23.1 I0.0557 J-0.1546
H0
M5
G0 Z1.

G0 X14.3647 Y23.1002
G0 X3.5332 Y23.2059
G92 Z0.
G38.2 Z-5. F100.
G38.4 Z0.5 F20.
G92 Z0.
G0 Z0.04 (IHS Springback + Backlash)
G92 Z0.
G0 Z0.13 (Pierce Height)
M3
G4 P1.
G0 Z0.06 (Cut Height)
H1
G1 X3.6582 Y23.2088 F100.
G3 X3.5779 Y23.3469 I-0.1613 J-0.0013
G3 X3.4693 Y23.3678 I-0.0821 J-0.1343
G3 X3.3672 Y23.3091 I0.0203 J-0.1536
G3 X3.3314 Y23.189 I0.118 J-0.1005
G3 X3.391 Y23.0787 I0.1545 J0.0123
G3 X3.5112 Y23.043 I0.1005 J0.118
G3 X3.6214 Y23.1026 I-0.0123 J0.1544
G3 X3.658 Y23.2088 I-0.1154 J0.0993
H0
M5
G0 Z1.

G0 X3.6582
M30
(PS100)

Screenshot 2023-05-09 at 3.12.15 PM
Screenshot 2023-05-09 at 3.12.15 PM1618×1754 156 KB

2

I’m using fusion360

3

What is the size of your air compressor? Is it possible that your system is starving for air?

What cutter are you using?
Consumables in good shape?
Any electrical interference? Nothing touching or crossing the USB cable, torch cable or work lead? Cables uncoiled?

2 Likes
4

There is nothing wrong with that code, that would prevent it from firing on the third cut loop. The problem is not in the code or Fusion.

Somewhat unrelated, you should do some testing of your actual torch height when cutting. That .040" of “springback + backlash” is excessive and probably has your cutting height closer to .100" than .060"

1 Like
5

Compressor is good
Crosspfire pro
no
yes

6

What should the springback + backlash be? Using the Miller Spectrum 625 x-treme, Crossfire Pro, with THC

7

IHS Cycle.nc (188 Bytes)

Run this file and it will probe the torch down and raise back up to .063". Measure the distance between the torch and the metal. If you don’t have a feeler gauge, just use a piece of 16 ga metal. If the height is actually .063", your springback and blacklash should be set to zero. If it is less than .063, the springback and backlash should be the difference between the actual height and .063"

Fusion only has a setting for one of those and the post processor adds .020" for the other. Fusion does allow you to set a negative value to compensate for the extra .020" that the post processor adds.

There is no setting in Sheetcam for either of those and the post processor adds .020", so I have to set my cut height at .040" to get an actual height of .060"

1 Like
8

Thanks man.

9

SOLVED I added +10% to the pierce delay and that took care of it.

1 Like