The second question: the workpiece machined by the gantry machining center is usually a large piece, the workshop should be installed with a traveling crane, the workpiece will be placed on the machine with a traveling crane or steam crane.
The third problem: the machine should be five-sided machining center, five-sided machining workpiece should be considered a clamping can be processed multiple surfaces, it is recommended to read the drawings to understand the design of the machined parts of the design basis and the process to make out the workpiece with high precision should be scribed, the surface in contact with the table milling, and then use this as a machining basis, the workpiece is placed in the direction of the consideration of the programmed and processed. Convenient, and finally is programming - tool setting - test cutting - perfect program.