Good machining practices: Proving a program
This is one article in a series that is meant to reduce
setup, program and run time errors by forming good habits as a CNC machine
operator. Discussions include properly proving a new program, making test cuts,
appropriate inspection techniques and hundreds more procedures that are
necessary to master in theory and practice.
Standard practice in machining circles is to rename the
extension on a program after it has been tested and proven to “.min”.
After successfully loading a program into the machine
controls it should be read and reviewed. If the program was generated with
CAD/CAM software at a minimum the finish passes should be verified
dimensionally with the part print. The theory behind this is that if a solid
model was drawn and the CAM system used this file to create a G code program
then the roughing cycle will follow the correct profile leaving stock for the
finishing operation.
Assuming that the set up and tool offsets have been done
correctly, follow the process to safely test your program.
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