Strange lead in/out behaviour

Problems and questions
1

Something odd is happening here. The lead in/outs on some contours are not showing up where the start point is. I also noticed that some of the lead arcs are different sizes. Is there something automatic going on here that I can disable? It is preventing me from moving the leads to where I want them. If they won’t fit I would rather they just not appear at all so I can see what’s going on. I also noticed that the tool path says “Could not fit lead-ins on some outlines”, but every outline DOES have a lead in/out arc.

Another issue is that the tool path arrears to floating 1/8" about the part contour. The drawing outlines should be at 1/8" above the table reference because I have a material thickness set at 1/8". This looks correct, but the tool path should be at the same height.

I was recently making posts for a router. Could I have changed something that is causing this? I double checked but could easily have missed something.

Thanks

2

If your lead ins won’t fit, SheetCam will try moving them. If it can’t find anywhere that the leadins will fit, it reduces the size and tries again. In your case you would probably be better off reducing the leadin size. It will then be less likely to move them.

You can’t currently turn this feature off but I will look into adding that option.

The tool paths will appear above the part contour as they are drawn at cut height.

If your leadins are ramped, you probably have leth leadin type set to ‘ramp’ in the tool definition.

3

Thanks Les. I think what I’m seeing as far as ramping is the difference between cut height and pierce height. The beginning of the lead should be at pierce height while the end of the ramp/start of the cut should be at cut height.

4

Yes, that is what you will get with ramp leadins enabled. If you disable ramp leadins then it will plunge straight down to cut height then cut the leadin.