[Larry Myers]

Hi All

I am looking for a little advise concerning the use of M19, spindle orientation, on my VMC. I have a Sharp 2412 with a Fanuc Oi-Mate controller.

Here’s what I want to do: I have a 1” X 1” X 1” pocket in a piece of aluminum. The corners have a 0.0625 radius. I want to clean up the corners with a broaching tool that I had made for me. I realize that there are different schools of thought in terms of broaching with a milling machine. For now, I would like to put those thoughts aside.

The broaching tool has a 0.5” X 0.5” square end (bottom cutting surface) that has a concave bottom for cutting and chip removal. It has a tapered shank 1.5” (upwards) to a 1” shank that will fit into a tool holder.

I want to move the tool to line up the corner of the tool with the corner of the pocket. This is assuming that that the tool is properly positioned in the tool holder. I want to drop the tool down in Z just to shave off the about 0.002” off of a wall and then retract it to a safe distance above the pocket, and then move it again to shave off the adjacent wall. Then onto another corner.

Here is a simple program. 0,0 is in the center of the square. You will see that for this example, I am not concerned about exact X and Y coordinates. I am more interested in the format of what I am attempting.

%
O02500 (CORNER BROACHING)
N1 G20
N2 G00 G17 G40 G49 G80 G90
N3 T1 M06 (broaching tool)
N4 G00 G90 G54 X-0.25 Y0.25 M08
N5 G43 H1 Z0.1
N6 G01 Z-1.0 F20
N7 Z0.1F100
N8 M09
N9 M30
%

For the life of me, I can not find any information on how or where to put M19. I want to lock the spindle in one position. There is no spindle lock on my machine. I know that if I press the SPINDLE ORIENTATION button on the machine, it will rotate the spindle back and forth and then lock it in place. The only way that I can find to unlock it is to hit the reset button. But then I really do not know what I am doing! 

Any advise will sure be welcome. Many thanks in advance!!!!!

Larry Myers
http://www.colfaxtactical.com

[rbcmetalwork]

On my SV2412 to release the spindle from its orientation I just press the spindle off button.

[dcoupar]

You might try putting it in the block after the M06.

[Larry Myers]

Thanks guys. I will try putting it in the block tomorrow.

Also, I suppose if the spindle stop button will release the spindle, perhaps M05 might also release it as well. Hum.... I'll try it tomorrow.

Thanks again,
Larry