I opened your file and it doesn't have the 2D profiles used to create the 3D entities, and looking at the part tree it seems that you never had 2D profiles. Unfortunately, 2015 doesn't have the "Extract Entity" tool which is new in 2016 Pro-Plat. As Andy states, you will probably have to trace each part manually to create a 2D object. Just be sure to set 'work plane by facet' for each object before tracing so that all the 2D entities for that object will be on the same plane. After the 2D trace is done, you can place that on the world plane.
IMO, his drafting palette method can get a little complicated and the object scaling could accidently get altered. Plus, the 2D profile should be in model space, not paper space when sent to the cutter. You should make it as easy as possible for the laser cutter, as you don't want to incur additional expense in reworking your drawings. I suggest that each 2D profile be saved in its own individual file, with the center of the object at the origin (X=0, Y=0). Save it as a DXF file with only the 2D profile (no mark ups), with nothing in paper space. Then go back to your 2D profile, mark it up with measurements and pertinent info and save that as a PDF for the operator to use as a reference.
FYI, I don't often use laser cutting but I do run a plasma cutter and often send out for water jet cutting. I have seen your method of tab and slot on many parts large and small. In those instances it was to facilitate assembly and welding making it easier to align the parts correctly.
EDIT: I should have mentioned the most important suggestion, that is, contact whoever will be doing the cutting and ask what they require as different shops have different requirements.
« Last Edit: November 21, 2016, 07:19:08 AM by Jason B »
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