The top-most table is a UCS and solid combination that tells FeatureCAM where to place the stock on the machine when trying to simulate the program. This equates to the Setup position on the machine when running the program. Both the position and the orientation of the UCS for the top-most table are important.
Full information is available in the Top-most table topic, and it is worth your while to read this section carefully. If you are having trouble with this step, it might also be helpful to read About UCSs for machine design.
The following clarifications for machines with turning may be helpful:
- The solid to be used for the top-most table should be the chuck rather than the jaws on a turn/mill style machine, even though the UCS is located on the jaws.
- On a machine with two spindles, this location should be on the main spindle. (The sub-spindle specification is described elsewhere.)