[ijalop]

Good morning everyone.
I'm really new in CNC machining and still trying to figure out how to create a G code. Been trying couple of times and nothing works for me.
I will be really appreciated if someone can help me in the begging by writing G code for a next part.

Short description:
I have 4 axis Chinese CNC machine which seems like working fine.
I'm cutting Bearing Bronze with 1/16 end mill 1/8 inch long bit.

Short explanation regarding the part.
I cut the case on my lathe which is cylinder 0.78" with cut inner diameter 0.66" and I need to mill those gaps 23 deg.
I showed it a little bit wrong but I need just 0.8" long cut with radius by the end (not flat as pictured).

Please help!!!
Thank you!

[waltraud]

Start learning from one of my CNC DVDs for free, go to youtube, put in my name Heinz Putz and you will get detailed lathe programming examples.
Also my website has examples at doccnc.com
Good luck: Heinz.

[ijalop]

Please guys help me:-)

[RCaffin]

That part will be very hard to machine. Using bearing bronze will make it even harder. If you are new to CNC, ... I suggest you start with something more simple.
Sorry about that, but I have machined similar things and it was NOT easy. The cutter tends to catch on the long thin arms and they go ... everywhere.

Cheers
Roger

[Heavy_Metal]

Hi,

The code is something like this;

%
O1000 (SUB-PROGRAM)
G90 X-0.5 Y0
G01 Z- ___ F ___
G91 G01 A11.5 Y0.03125
G90 X0.92875
G91 A-23 Y-0.0625
G90 X-0.5
G91 G01 A11.5 Y0.03125 ( X-0.5 Y0 A0 - STARTING POINT )
G00 A22
M99

I assume the 4-th axis is the A-axis.
This is a subprogram and repeat it 8 times.
Test it first on a soft material.

Regards,
Heavy_Metal.

[Switcher]

It looks like you need a slitting saw.

[ijalop]

Thank you! Will try on PVC first!

- - - Updated - - -

It looks like you need a slitting saw.

Really nice idea. I have something in mind so it could be even easier than with a bit

[Heavy_Metal]

Hi,

OK, let us know what the final results are.

Made some changes ( Metric ) for a random FANUC control that should work.
Maybe the A- and Y- values in the sub-program should be A+ and Y+ but thats what you have to find out at the machine.

%
O1000(MAIN-PROGRAM)
G54 G17 G40 G90
M6 T1
S3000 M3
G00 G90 X0 Y0 A0
/M8
G43 Z25. H1
M98 P1005 L8 ( REPEAT 8 TIMES - OR M98 P81005 )
G00 G90 Z25. M9
G00 G28 G91 Z0 M5
G00 G28 Y0. A0
M30

O1005 (SUB-PROGRAM)
G90 X-10. Y0
G01 Z17. F1000
G91 G01 A11.5 Y2.
G90 X30.F350
G91 A-23. Y-4.
G90 X-10.
G91 G01 A11.5 Y2. F1000 ( X-10. Y0 A0 - STARTING POINT )
G91 G0 A45
M99
%

Regards,
Heavy_Metal.