Okuma OSP Mill/A Axis Rotary Toolpath

[Mick]

I recently did a rotary contour toolpath, using unroll (it was a contour around a cylinder), and posted the toolpath using the Inhouse MPMaster Okuma post. The toolpath looked fine, and verified fine. However what the machine actually did, was arc on to the contour, then instead of doing the full 360 degree move, it just arced off, as can be seen in the code below.

 

Does anybody have any ideas as to how to avoid this? Its kind of got me stumped, as the toolpath looks fine.

 

 

X50.546 A179.222 F1164.039

X50.521 A179.333

X50.499 A179.444

X50.481 A179.555

X50.468 A179.666

X50.458 A179.777

X50.452 A179.889

X50.45 A180. <-- Should be a 360 degree move after this line

X50.452 A180.111

X50.458 A180.223

X50.468 A180.334

X50.481 A180.445

X50.499 A180.556

X50.521 A180.667

X50.546 A180.778

[DavidB]

Mick,

The X value before and after your highlighted line is the same but has different A value is that right?

[Mick]

David,

 

Yes, thats right. The X/A lines preceding, and following the marked line, are linearised entry arcs (since unroll was used)

 

After the line X50.45 A180, it looks like it should have A180 on a line by itself, but then I'm thinking that the machine would think "I'm already at A180, therefore I will move to the next line".

 

I think I may need to unroll the curve, and use Axis substitution (with no unroll). I might try that shortly...

[Jack Neelands™]

i use a 5 axis curve and lock the 4th axis when going all the way around a part...the unroll doesnt work too well when going all the way around on the okuma ...had the same problem with my okuma here