I recently updated all my SIEMENS Post-Processors to use the CIP arc format and it makes a HUGE difference. The size of 3D programs drops dramatically. This is one function I wish FANUC would copy! The arcs are defined by 3 points, in ANY tool orientation. The three points are the starting point, ending point and intermediate point. That means you are not limited to cutting arcs in the G17, G18 & G19 planes. Furthermore, CIP arcs eliminate the need for Plane selection altogether. You can also cut arcs in simultaneous 5-axis motion! I'm using the midpoint for the intermediate point but theoretically,
it could be any point between the start point and end point. The NC code below shows a basic sample of the CIP Arc Format in use. The starting point is the current position. X,Y & Z define the end point. I1, J1 & K1 define the intermediate point. While
the CIP Arc Format makes it a bit more difficult to determine whether
an arc is CW or CCW, simply spending a little time reading the NC code
will also give you the answer. As practical matter this is not an issue.  |
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SIEMENS CIP Arcs - Are you using them?
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