Newb shop teacher with simple pocketing operation

HS shop teacher here with a newly assembled Shapeoko 5 - I expect to have LOTS of questions as I’m just learning Create alongside my students (I’m about 2 steps ahead of them).
Here’s a simple table top project. I’m trying to separate the layers between the inner circle and the ‘island’ shape for pocketing (the island keeps the stock thickness). I tried to offset the island with a contour and then run a pocket up to the inner circle but the toolpath still wants to pocket everything. I have no doubt this is a simple fix when creating my layers but I can’t figure it out yet!

vt.c2d (2.5 MB)

As far as the program is concerned it is doing its job of creating a pocket inside that circle.

In order to machine the region between you need to select both vectors for the toolpath.

I would also highly recommend stepping up from a 1/8" bit to at least a 1/4" bit.

3 Likes

Thank you, I am trying to select both vectors but that’s the part I’m hung up on. When I click ‘select by layer’ I can only select 1- if I select either the inner circle or the island it says the selected layer has no elements in it. I’m sure there is a really simple answer to selecting both layers but it’s eluding me at the moment.

Both objects will need to be on the same layer.

Your file:

looks to have everything on the Default layer:

General guidelines for toolpaths:

  • work from top → bottom and inside/center → out
  • Use an appropriate tool size and definition for a given feature/part
  • Select and associate the geometry which one wants to use for a given toolpath, if need be, isolating it on a layer

To select more than one thing at a time or to modify a selection, shift-click to add/remove an item from the selection — if we now shift-click on the outer-most circle:

then we get a selection which may be used to pocket out things in-between:

Not seeing a reason for the contour:

so disabling it

The “Outer Circle Cut”:

should be the last operation, however, the new beta

has added a “Cutout” toolpath:

which may be used to cut most of the way (there’s a bug which cuts off part of tabs in the current beta)

Then a Contour toolpath may be used to finish the cut:

which previews as:

Attached as a v8 file.

vt_v8.c2d (1.5 MB)

3 Likes