cnc machining

[josh6575]

Does anyone have any programs they would share for me to run and make some parts? I am taking some classes and thought it would be interesting to make some parts that I will use instead of just weird shapes and engravings to get used to loading programs and setting offsets.

[Szczerba]

Here is a free CAD program I was told is decent. Have not used it. I did download it a week or so ago. Got a phone call two days ago from the company asking if I had any questions about it. Not bad for customer service.

Free 2D: Siemens PLM Software

[josh6575]

Here is a fun program for cutting out disk that fit vanquish hubs and uses 6 stays to separate. These are 2.5" tall disk cut and plunged with an 1/8" end mill.

%
O04567
G17 G20 G40 G80 G90 G94 (BEADLOCK RINGS 3.25" x 3.25" STOCK)
M00 G54 (BOTTOM LEFT)
M06 T1 (1/8 EMILL)
M03 S3000
G43 G00 G54 X1.625 Y1.625 Z1. H01
G01 Z-0.3 F20.
G91
X0.1735
G03 I-0.1735
G01 X-0.1
Z0.1
G90
G00 G54 X1.625 Y1.625 Z1.
G00 G55 X0. Y0. Z1.
G01 Z0.1 F20.
G81 X0.3415 Y0 Z-0.3 R0.1
X0.1708 Y0.2957
X-0.1708
X-0.3415 Y0.
X-0.1708 Y-0.2957
X0.1708
X1.0313 Y0.
X0.5156 Y0.8931
X-0.5156
X-1.0313 Y0.
X-0.5156 Y-0.8931
X0.5156
G80 G90
G00 G54 X2.9375 Y1.625 Z1.
G01 Z-0.3 F20.
G03 I-1.3125
G91
G01 X0.01
Z0.1
G28
M30
%

[C*H*U*D]

Are you just looking for G-code? Or software programs?

[josh6575]

Just wanting to share g-code programs.

[SMR 510RR]

Write your own! What is the purpose of going to school for machining to run other peoples code?

[Mayhem Eng.]

I think what he wants is to see the process of a part from someone else.

How the part is setup, Fixture/Tooling Soft jaws, mill, lathe.
Material round bar of flat stk.
Alum. Steel, plastic delrin
Tool selection Endmills 2flt 3 flt. 4 flt., drills, taps, carbide, HSS.
Feeds And speeds
Fixture offsets called up in the programs. Sub Programs.
G code
M code

This is all helpful to someone getting started.

You can give the same part to several different people to prog. and they will have a some what different approach.

Pm me I will help you out.

[josh6575]

Originally Posted by SMR 510RR

Write your own! What is the purpose of going to school for machining to run other peoples code?

I already have lets see some of your proven programs smarty pants.

[josh6575]

Thank you sir, I am interest in figuring out how others hold the small parts. I have made some bead lock disk, chassis, and some other projects. I had a hard time with thin carbon fiber. It started warping and trying to jump off of the parellels as I milled it. Check out my thread in the bully section to see what I have done so far.

Originally Posted by Mayhem Eng.

I think what he wants is to see the process of a part from someone else.

How the part is setup, Fixture/Tooling Soft jaws, mill, lathe.
Material round bar of flat stk.
Alum. Steel, plastic delrin
Tool selection Endmills 2flt 3 flt. 4 flt., drills, taps, carbide, HSS.
Feeds And speeds
Fixture offsets called up in the programs. Sub Programs.
G code
M code

This is all helpful to someone getting started.

You can give the same part to several different people to prog. and they will have a some what different approach.

Pm me I will help you out.

[rlockwood]

Originally Posted by josh6575

I already have lets see some of your proven programs smarty pants.

Nice attitude!

[Krawler23]

I know this is really noobish but I have taken a liking to cnc machining in my shop class at high school. Anyway why do you still use g code which takes so much longer to use when you could just use a cad program then transfer it over to a cam program?

[C*H*U*D]

Originally Posted by Krawler23

I know this is really noobish but I have taken a liking to cnc machining in my shop class at high school. Anyway why do you still use g code which takes so much longer to use when you could just use a cad program then transfer it over to a cam program?

The CAM program exports G-code which is what your controller uses to talk to the machine. It's still G-code though.

[Krawler23]

^ I knew that I just thought people were still manually typing g code for the program.

[C*H*U*D]

Originally Posted by Krawler23

^ I knew that I just thought people were still manually typing g code for the program.

Actually you can. For many projects, a good G-code person can program a machine faster than it takes to move a file from CAD over to a CAM package to export your post.

Will writing G-code ever be taken over entirely by post processors? Maybe, but those running those CAM packages may never know what is really going on.

You say you are in High School and interested in CNC machining. Learn G-codes, and when you are out of school looking for a job, blow the doors off of your interviewer by actually knowing what you are talking about.

[Charlie-III]

Originally Posted by C*H*U*D

Actually you can. For many projects, a good G-code person can program a machine faster than it takes to move a file from CAD over to a CAM package to export your post.

Will writing G-code ever be taken over entirely by post processors? Maybe, but those running those CAM packages may never know what is really going on.

You say you are in High School and interested in CNC machining. Learn G-codes, and when you are out of school looking for a job, blow the doors off of your interviewer by actually knowing what you are talking about.

+1, good points. Keep in mind, doing the CAD to CAM route means you are using someone else's idea on how to do a tool path. A good machinist can usually find a better way, if they try. My boss at the machine shop used to say, "Find the trick to make a part.....a good machinist can always find a better way." We never did CAD to CAM, we always did G-code (~14 years ago).
Also, knowing G-code makes it easier to do minor tweaks direct in the code.

I haven't used G-code in years, but could pick it up again fairly quickly. No, I was never an expert.

[rlockwood]

Originally Posted by Charlie-III

+1, good points. Keep in mind, doing the CAD to CAM route means you are using someone else's idea on how to do a tool path. A good machinist can usually find a better way, if they try. My boss at the machine shop used to say, "Find the trick to make a part.....a good machinist can always find a better way." We never did CAD to CAM, we always did G-code (~14 years ago).
Also, knowing G-code makes it easier to do minor tweaks direct in the code.

I haven't used G-code in years, but could pick it up again fairly quickly. No, I was never an expert.

To some extent, I get what you're saying-- on the other hand, modern CAM packages can output VERY optimized code that would be difficult to match when written by hand.

Here's a video of a part I programmed awhile back. It was a prototype part, so its far from optimized (mostly I just let the software do its thing)

Consider that the software decided how to break up all of the Z-levels, is staying in rapid mode on plunges, etc. The second tool (while FAR from optimal) even has some 3D rapid moves, which would be incredibly dangerous to program by hand.

YouTube

Just something to consider. The robots are taking over.

[tarmo120]

Originally Posted by josh6575

Thank you sir, I am interest in figuring out how others hold the small parts. I have made some bead lock disk, chassis, and some other projects. I had a hard time with thin carbon fiber. It started warping and trying to jump off of the parellels as I milled it. Check out my thread in the bully section to see what I have done so far.

This is how I do my Beadlock rings.

I take a square sheet of stock, a little larger than the ring it self.
Drill the holes according to the program(measured from the center or from either corner)
Then put a squared up block in the vice, and repeat the holes but with accurate placement so you can repeat the process later.
Then bolt down the Beadlock and cut your contours.

There are many ways to do things. Let your fantasy guide you.