Amazing what this new cnc machine can do.

[Solar1971]

Hey guys.
I'm just here to do a reverse rant. Lol say good things about our new cnc machine.

Dude. This thing can do things I only thought were possible with a y axis. Without a y axis.
Ok. Imagine round stock In the chuck of a machine.
This material is 5 inch OD, 3 inch ID.
We need to make 2 key ways in the X axis. 180 %%d "degrees" apart. That was an autocad joke by the way. Anyway. Our end mill is 1/2 inch. But the key way is 5/8 wide.
So how does the machine make the key ways wider in the y axis without a y axis.
If it used the C axis to rotate the part slightly the side walls Of the key way would be tapered. Not straight. They need to be straight.

So this machine will cut along the x axis while slightly rotating the C axis ever so slightly back and forth in concert... At the same time while doing all the math internally. Trigging out everything it needs and executing it in real time.

BAM the part is done with a 5/8 key way and all walls perfectly straight. WTF!!!
This thing is amazing. All I did was tell it I have a 1/2 EM BUT I WANT A 5/8 key way in the Y axis which you don't have mr machine but I don't care. Just make it happen.

And like magic. It's done. What's the next modal gonna do? Make me coffee and rub my back?

 

[Spyderedge]

Video? blah blah blah 10 character limit

 

[ewlsey]

180 %%d "degrees" apart.

Now this I like. Here in IL, engineering students are still required to learn AutoCAD and Fortran programming. We are truly on the cutting edge.

(Now that I think of it, my info is actually 10 years old, but I doubt it has changed)

 

[Solar1971]

Sorry I dont have a video. But I will make one.
Thing is you can barely see the C axis rotating.
You only see the X axis moving up and down.
The C axis in only moving about 0.235 of a degree total. Yes that's 235 thousandths of 1 degree.
And it's moving through that .235 degree at varying speeds. Slow then faster then slow again.
This machine can rotate the C axis in .001 of a degree increments. So when watching the machine.
You can only really see the C axis rotate because of the C axis rotation displayed on the control screen.
You can't really see it with you eyes.

Frickin amazing.

All I can really say about this ability is BRAVO DMC/MORI

 

[michiganbuck]

Amazing and magic good words to use… some of the videos milling harder stuff looks more like grinding with and end mill instead of a wheel.

 

[angelw]

Hey guys.

So this machine will cut along the x axis while slightly rotating the C axis ever so slightly back and forth in concert... At the same time while doing all the math internally. Trigging out everything it needs and executing it in real time.

BAM the part is done with a 5/8 key way and all walls perfectly straight. WTF!!!
This thing is amazing. All I did was tell it I have a 1/2 EM BUT I WANT A 5/8 key way in the Y axis which you don't have mr machine but I don't care. Just make it happen.

Hi Solar,
This could be done with Polar Interpolation (G12.1 or G112), no "Y" axis involved, and has been around since at least circa Fanuc Series 10 controls. With Polar Interpolation, after taking a roughing cut on Centre Line, the tool could be made run down one side of the slot and up the other, so that climb milling could be used to finish the feature. Tool Radius Comp can be used to regulate the size when using Polar Interpolation.

The attached picture shows a simple example of what can be done using Polar Interpolation (no "Y" axis used). Although the picture seems to show the tool moving in the "Y" axis in the N202/N203 area, the tool doesn't move in "Y". The picture just shows the apparent tool path, you simply program the part as if a "Y" axis exists then the control Interpolates the X and C axis to achieve the requested result.



Is it Polar Interpolation you're using, or some other function of the control?

Regards,

Bill

 

[rlockwood]

From my understanding he's talking about a keyway being milled in the radial direction (along the length of the part) rather than work on the end.. I'm just not quite sure how what he's saying is possible, so I'm intrigued..

 

[Hertz]

I believe he is talking about on the side(not along the length).
Picture a wrench flat but instead of flats they are grooves. I know what hes talking about with the slot being tapered at the ends cause our Live Tooling Lathe does just that if we try to program a slot so this what hes doing is intriguing me as well. What is the code it uses?

 

[Solar1971]

The keys are on the face of the part, along its (X axis). Not along its length (Z axis).
Sorry if my original post was not clear. My bad.

So this is called polar interpolation? Thanks for the heads up. Well it's frickin awesome.
The best part was that we didn't write the program. We used a software called MAPPS.
It's a Mitsubishi conversational language. I forgot to mention that before. Again sorry.

We just plugged in some number and it punched out the code.
Then we went to a screen and were able to see a fully rendered 3d model of the part and a simulation of the all the cutting cycles including the milling before the program was run.

Just awesome.

 

[Solar1971]

I believe he is talking about on the side(not along the length).
Picture a wrench flat but instead of flats they are grooves. I know what hes talking about with the slot being tapered at the ends cause our Live Tooling Lathe does just that if we try to program a slot so this what hes doing is intriguing me as well. What is the code it uses?

Sorry hertz. I don't know all the code yet. I will look it all up tomorrow. Today we were getting shown how to use the MAPPS conversational software. I saw the code it punched out but I don't remember all of the g codes used. I will check it out tomorrow.

 

[Hertz]

Sorry hertz. I don't know all the code yet. I will look it all up tomorrow. Today we were getting shown how to use the MAPPS conversational software. I saw the code it punched out but I don't remember all of the g codes used. I will check it out tomorrow.

You mean a slot like this?

 

[Solar1971]

You mean a slot like this?

YES except its got a hole through it length wise, so it looks like a pipe. So the slot down the middle of the face is acctually 2 shorter slots. If you catch my meaning.

 

[angelw]

So this is called polar interpolation? Thanks for the heads up. Well it's frickin awesome.
The best part was that we didn't write the program. We used a software called MAPPS.
It's a Mitsubishi conversational language. I forgot to mention that before. Again sorry.

We just plugged in some number and it punched out the code.
Then we went to a screen and were able to see a fully rendered 3d model of the part and a simulation of the all the cutting cycles including the milling before the program was run.

Just awesome.

Hi Solar,
Yes, it's Polar Interpolation. The Mits control uses the same "G" code as the Fanuc control (G12.1 or G112). MAPPS will access the same function, but you wouldn't necessarily be aware of that when using MAPPS. The same Polar Interpolation function can be programmed manually at the control, or via a CAM created programs.

Following is the program code example for the tool path of the part shape pictured in Post #6.

O0001 ;
-----------
-----------
-----------
N010 T0101
-----------
-----------
-----------
N0100 G00 X120.0 C0 Z _ ; - Positioning to start position
N0200 G12.1 ; - Start of polar coordinate interpolation
N0201 G42 G01 X40.0 F _ ;- Program geometry based on cartesian coordinates starts here - X,C plane.
N0202 C10.0 ;
N0203 G03 X20.0 C20.0 R10.0 ;
N0204 G01 X–40.0 ;
N0205 C–10.0 ;
N0206 G03 X–20.0 C–20.0 I10.0 J0 ;
N0207 G01 X40.0 ;
N0208 C0 ;
N0209 G40 X120.0 ;
N0210 G13.1 ; - Cancellation of polar coordinate interpolation
N0300 Z __ ;
N0400 X __C __ ;
------------
------------
------------
N0900M30 ;


Regards,

Bill

 

[Vancbiker]

Daewoo I setup for Keytronics around 1988 could do that. Fanuc 10TF control. Neat that you're getting to learn some new to you stuff though!

 

[Nick Mueller]

Even the Haas TL lathes can do that.
+


Nick

 

[TeachMePlease]

If you think that's neat, then this oughta blow your mind.

 

[Hertz]

I'm having a hard time understanding what is so hard or complex about a slot on the face? Is this what you have? Can't you just orient the c-axis and cut the slot along the x? Straight G1 through the center? I must be misunderstanding the part.

 

[Carbide Canuck]

I'm having a hard time understanding what is so hard or complex about a slot on the face? Is this what you have? Can't you just orient the c-axis and cut the slot along the x? Straight G1 through the center? I must be misunderstanding the part.

1. His machine doesn't have a Y axis
2. The slot is 5/8" but he only has a 1/2" end mill.

These two problems combined means he can't do it the simple way you described. Gotta use polar interpolation.

 

[Solar1971]

1. His machine doesn't have a Y axis
2. The slot is 5/8" but he only has a 1/2" end mill.

These two problems combined means he can't do it the simple way you described. Gotta use polar interpolation.

Exactly... But I didnt know this ability was so common. To me it looked like VOODOO magic from outer space sector 5 in the dark nebula system where no man has ever returned. lol

Well, thanks for bursting my happy time bubble.

 

[Solar1971]

I'm having a hard time understanding what is so hard or complex about a slot on the face? Is this what you have? Can't you just orient the c-axis and cut the slot along the x? Straight G1 through the center? I must be misunderstanding the part.

I love the way you can make pictures in 3D so quickly of what im talking about. What are you using? newer version of AutoCAD or something else.
Its cool... I want it...