Probing angles for G68

CAD/CAM
1

I’ve seen this link referring to G68 for coordinate rotation. It seems like an ideal way to pick up an angle for a part that has been flipped and is now held by a round boss. This link was from a Tormach account if I remember correctly so that would imply G68 support in PathPilot.

Fusion has an option to probe a face to pickup the angle but it’s not implemented in the post processor.

case “probing-x-plane-angle”:
error(localize(“Probing cycle '” + cycleType + “’ is not supported.”));
break;
case “probing-y-plane-angle”:
error(localize(“Probing cycle '” + cycleType + “’ is not supported.”));
break;

The Tormach CAM Driven Probing page seems to match the approach used in the Fusion post processor. It of course doesn’t list any functions called probing-x-plane-angle or probing-y-plane-angle.

I discovered that the XoomSpeed post processor does implement that through a function call I haven’t seen before. The code from that post processor does some unexpected things with regard to Z height and I’m not sure I’m comfortable trusting the safety of the probe to its output.

o<f360_probing-x-plane-angle> call …

Before I dig deeper into a solution I thought I would ask if anyone else has solved the problem.

Of course the simplest path for me would be to have support for those function in PathPilot and Fusion. The alternative might be to alter the Fusion default post processor to implement some of the XoomSpeed logic for those two probe types.

2

Jon,

G68 does not exist in Pathpilot, coordinate rotation is done with an R value in a G10 L2 command. It does work (see a video I did on it here) but I’d discourage probing for rotation, there are a lot of bugs regarding probing and rotation that haven’t gotten attention that make using it a frustrating experience.

Thank you,
Norman

1 Like
3

Norman,

Thanks for the information! I’ve played around with what was covered in the video and I think it’s definitely something to have in the toolbox. I really don’t think I would have discovered that without your assistance. I have been over the PathPilot documentation for G10 LXX and it doesn’t reference the R in that context although it does mention R for setting tool radius if I recall correctly.

I’ve gotten the impression from the internet in general that there are challenges with probing in rotated WCS and I can appreciate the difficulties. That being said, if there is ever any movement on rounding out angle probing in PathPilot I hope it gets mentioned prominently in the release notes. I would like to come back and revisit this whole thing if the support improves.

Thanks again!

-Jon