OK, say I've got a CNC mill and a Modulator Work Holding System from High Tech Systems. Say there's a disk I need to cut out of flat aluminum stock. Just an example problem. I don't actually need a bunch of disks.
Now I can secure the stock no problem. I'll secure it on MDF or acrylic scrap as spoil board. But when I send the cutter in to free the disk from the stock, that thing will become free, bounce around and shatter a nice carbide endmill.
If I clamp it, then the cutter will strike the clamp sooner or later, unless I have it do one side, stop cutting, place like a rocker clamp on the work over an area that will not be seeing the cutter again, and tell it to cut out the other side. Sounds possible though I'm not sure how to explain this to the CAM tool.
I can use double-sided tape, the fiberglass-reinforced Duck brand, this worked nicely with acrylic but the lubricant/coolant I used for aluminum quickly ruined the tape's stick and the work freed itself.
I could glue it. It's a mess to remove the glue, but I could.
I can leave tabs- like the sprues that hold a bunch of model parts in one rack together. Then... Dremel I guess. Takes awhile and difficult to finish away or provide tight tolerances on.
Sometimes my work has a hole in it. I could always stop the machine prior to cutting the work free, and put a bolt or screw in to screw it to the spoil board. But there's no threads beneath to screw a bolt into, and the spoil's not normally thick enough to hold a screw either. Actually without a pilot hole any of the larger holes I make might not take a large screw very well.
What's really the practical option(s) here? Is there a good primer on the web for this?