For people that are machining with robots is there an option like "G41" on a cnc. If not how are you controlling features of size with tight tolerances?
Machining cutter compensation
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Beek -
March 15, 2017 at 6:28 PM -
Thread is marked as Resolved.
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Without roboguide I have no idea (I'm hardly an expert though). If you are using roboguide: when you're making a feature, go to the Raw Normals tab and set the translation offset across the segment to 1/2 the tool diameter.
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This has been my experience also. You can generate the offset path in RoboGuide and probably any other decent offline cad to path software.
I'm not aware of a standard command in the code to do this.
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Without roboguide I have no idea (I'm hardly an expert though). If you are using roboguide: when you're making a feature, go to the Raw Normals tab and set the translation offset across the segment to 1/2 the tool diameter.Ok. So if I use roboguide to generate the code to make a "shape" with a 1/2"(12.7mm) tool. At some point during my run the "shape" goes undersize. At this point do I need to re-post out of roboguide using a 12.6mm tool, or is there some way to adjust the size on the fly?
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What we do is place the robot's TCP on the edge of the cutter, and then adjust the position of the TCP as the cutter wears, or tools are changed. Cutter size is measured using a banner slot sensor and robot searches.
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Ok thanks, I'll try that.
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What we do is place the robot's TCP on the edge of the cutter, and then adjust the position of the TCP as the cutter wears, or tools are changed. Cutter size is measured using a banner slot sensor and robot searches.Nation, what if you need to interpolate a pocket? Doesn't the TCP being on the edge only work on one side then? The CNC G41 command would shift the path to the inside of the pocket no matter which side you are on. Have you figured out a way to compensate for that?
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Nation, what if you need to interpolate a pocket? Doesn't the TCP being on the edge only work on one side then? The CNC G41 command would shift the path to the inside of the pocket no matter which side you are on. Have you figured out a way to compensate for that?That would be correct.
When doing the search, I actually create 4 TCPs, one for each quadrant of the tool. My application is deburring/blending though, so I am not really using them in a machining aspect.
In the case of the pocket example, you would have to switch TCPs.