newbie need help on Z safe and cutting on air

[mcdoggie]

hi there
I' m newbie and trying hard needing help

I'm using artcam and cnc-ucb firmwares on my 6040 router

I was able to generate g-code but when i'm running the program I think the z-safe feature in making the toolpath has something to do in "air cutting" it won't cut the wood.

heres the few line of the g code

(safe z 0.125)
(Material Size) (X=2.860, Y=4.450, Z=0.243)
(Tool Number:1) (0.063 inches dia. ball nose)
G20 G49 G80 G90
G0Z0.2685
M3 S3800
G0 X2.4697 Y2.2262 Z0.2684
G1 Z0.1877 F30
G1 X2.4746 F100
X2.4771 Y2.2307
X2.4772 Y2.2338
X2.4701 Y2.2487
X2.4696
G0 Z0.2684
G0 X0.7282 Y0.4973
G1 Z0.1877 F30
G1 X0.9796 F100
X1.0287 Y0.4976
X1.0270 Y0.5060
X1.0277 Y0.5171
X1.0295 Y0.5221
X0.4966
X0.4965 Y0.5282
X0.4967 Y0.5470
X1.0107
X1.0051 Y0.5503
X0.9977 Y0.5614
X0.9980 Y0.5708
X0.9365 Y0.5628
X0.9143 Y0.5601
X0.8810 Y0.5595
X0.8478 Y0.5569
X0.7923 Y0.5590
X0.7812 Y0.5611
X0.7701 Y0.5654




is the G0Z0.2685 has something to do in "Air cutting" or the Z-safe?

also I' m attaching the "State" of the program as shown by CNC-USB firmware

thanks will appreciate any help

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[Jim Dawson]

Where did you zero the Z at on the machine? And where is your part Z 0 in CAM? It looks like at the minimum Z is at +0.1877 (G1 Z0.1877 F30)

[mcdoggie]

at the machine part zero is at top of the material
at the cam i already forgot where i set it

i do another one and ty to screen shot the toolpath settings and post it here

thanks

[mcdoggie]

i made a tool offset of -0.2439 whic is the thickness of material
and it cut the material and observe the z safe distance goes as specified.

i think ia hve to review and focus the setting of material in the cam
i' m still little bit confuse on this subject - machine zero, zero part, tool offset
I guess i need more reading

btw i'm using artcam and cnc-usb firmware