c-axis filter

[4thaxis]

I am green to c-axis programming. I can get mastercam to do what I need to do with no problems but when I post the operation that is where I get a result that I am not happy with. I am going to piece in a part of a prgram that I posted for milling a 1.120 hex using a 3/8 end mill. All of this code is just for milling (1) side of the hex. Is there any way to change a filter setting or something so it does not break up 1 move into pieces? In my mind to mill a flat on a hex all I need is an "x" and a "c" value for each side.

 

Here is the NC code for milling just 1 side of a hex.

 

G0 G54 X1.8473 Z.1

C6.508

G97 S2500 M52

G98 G1 Z-.2125 F20.

X1.7474 C6.67 F64.95

G41 X1.6476 C6.856

X1.645 C3.637 F1391.56

X1.6449 C-3.641

X1.6476 C-6.856

X1.6053 C-10.688 F1313.43

X1.571 C-14.658 F1377.56

X1.5447 C-18.743 F1431.67

X1.5267 C-22.914 F1473.28

X1.5169 C-27.138 F1500.33

X1.5155 C-31.381 F1511.44

X1.5223 C-35.607

X1.5374 C-39.781 F1484.56

X1.5606 C-43.872 F1448.13

X1.5917 C-47.85 F1398.67

X1.618 C-50.545 F1348.62

X1.6476 C-53.144 F1303.19

X1.645 C-56.363 F1391.56

 

Also are all the feedrates needed also?

 

Thanks in advance,

Brian

[GoetzInd]

Try using polar coord. conversion. (G112). This will give you xy moves and converts them to C. A lot less code and usually a lot better finish.

 

Mike

[kh012]

+1^ on the polar cord. (G112). it looks like you might be driving on a slpine and not lines/arcs.

with our hardinge msy i prg. to the edge of the tool with a long lead in line. set my feed rate for the chip load i want

then the machine figures out the "C" axis feed rates to keep the chip load i want.

[4thaxis]

That is what the output looks like but the geometry is lines and arcs (arcs are on the corners of the hex, not included in prgram example).

[Philcott]

Brian,

 

I believe the feed as posted is in degrees per minute so to keep your programmed feed rate mastercam converts feed as needed.

 

I would use c-axis tool path/face contour to define your cutting information then go into misc values and under integers change Misc integer MI4 to a -1 ( Mill Cyc G107/G112 [0=OFF,1/-1=ON) that will allow the program to post using polar notching as stated above. This will give you more familiar code and feed rates.

 

Hope this helps.

[4thaxis]

G112 made it just like I wanted thanks!