There's a lot that can go wrong, and it's too much work & tech integration for most shops to make the investment.
Even if you have the 3D models for everything involved: tooling, tool holders, stock material, fixtures, CNC machine, along with the instructions for the movement of all of it, there are still many opportunities for both configuration errors and runtime crashes.
For instance, CAM tools usually simulation axis movements only, before they've been converted to gcode/NC. If there's a bug in your post-processor that generates gcode or if it doesn't perfectly match your machine configuration, you're going to crash.
Even if you use a simulation tool like Vericut or NCSIMUL, which both simulate using the actual gcode, the physical machine settings may be out of sync, or there could be a wrong piece of stock material loaded or some foreign object (a wrench) that causes a crash.
Probing routines and careful selection of Work Coordinate Systems can help verify/eliminate some of these unknowns at runtime, but it's still no guarantee that the part will come out right.
Even if you have the 3D models for everything involved: tooling, tool holders, stock material, fixtures, CNC machine, along with the instructions for the movement of all of it, there are still many opportunities for both configuration errors and runtime crashes.
For instance, CAM tools usually simulation axis movements only, before they've been converted to gcode/NC. If there's a bug in your post-processor that generates gcode or if it doesn't perfectly match your machine configuration, you're going to crash.
Even if you use a simulation tool like Vericut or NCSIMUL, which both simulate using the actual gcode, the physical machine settings may be out of sync, or there could be a wrong piece of stock material loaded or some foreign object (a wrench) that causes a crash.
Probing routines and careful selection of Work Coordinate Systems can help verify/eliminate some of these unknowns at runtime, but it's still no guarantee that the part will come out right.
Hardware is hard!