I have problem with G17,G18,G19 please any help

[Mustafa-CNC]

Why I am getting G17 and sometimes G19 on milling on XZ plan, (lathe mill/turn) here is what I am getting

 

(TOOL - 9 OFFSET - 29)-----------------------------------------I am milling on the sub spindle (on right)

(5/8 FLAT ENDMILL DIA - .625)

(PLUNGE R.31)

G0 G20 G40 G55 G80 M200                                 

G330

M269

G28 V0.

G0 G53 X0.

G53 Z-14.

G0 T0929

G17 G98   - ------------------------------------------------------------------------why G17?

M245

G28 H0.

G0 G55 X2.646 Y0. Z-.25 M8

C0.

M268

G97 S855 M13

Z-.1

G1 Z0. F250.

X2.6849 Z1.1138 F12.5

G18 G3 X2.8784 Z1.6166 R1.5001 --------------------------------------- why now G18?

G0 X2.8783 Z-.25

X2.466

G17 -----------------------------------------------------------------------------why?

Z-.1

M9

M05

M246

G0 G28 V0.

G0 G53 X0.

G53 Z-14.

M201

M01

 

 

The codes is working without problem but I don’t like it.

So please any ideas.

Thanks

[Guest]

Machine? Post?

 

So it's running ok and you're complaining?

 

Why?

 

Because your machine needs it on the changing planes...

Do you even know what G17, G18 & G19 do?

 

G17 arc in an XY plane

G18 arc in a XZ plane

G19 arc in a YZ plane

[jlw™]

Code looks good to me.

[Mustafa-CNC]

 

Thanks,

And yes sure I know the different and how they are working. I am (milling) using X and Z only ,so I should get G18 only, but as in the codes Mastercam post G17 and then switch to G18 to do the arc(G03). In hand write code I was using G18 only. I complain about it because it’s shop standard.

That’s what I usually do in hand write:

 

G0 G20 G40 G55 G80 M200                                

G330

M269

G28 V0.

G0 G53 X0.

G53 Z-14.

G0 T0929

G18 G98 

M245

G28 H0.

G0 G55 X2.646 Y0. Z-.25 M8

C0.

M268

G97 S855 M13

Z-.1

G1 Z0. F250.

X2.6849 Z1.1138 F12.5

G3 X2.8784 Z1.6166 R1.5001

G0 X2.8783 Z-.25

X2.466

Z-.1

M9

M05

M246

G0 G28 V0.

G0 G53 X0.

G53 Z-14.

M201

M01

[Guest]

I would leave it exactly as it is.....

 

When the day comes that you need a different plane output, you don't want to get it wrong....

 

Mastercam defaults to G17, then switches as it's needed.

 

A shop standard like that is suicide

[Mustafa-CNC]

Thanks,

So it is default to post G17, yes I will leave it.

Thank you

Mustafa

CNC programmer

Oregon

[crazy^millman]

Thanks,

So it is default to post G17, yes I will leave it.

Thank you

Mustafa

CNC programmer

Oregon

 

Good decision.

 

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