6.2 ESSENTIAL CONTROL FUNCTIONS - BASIC MILL OPERATOR

When we use the term "crash" on a machine tool, we are primarily speaking of: - ANS The spindle colliding with another object in the machine enclosure Crashing a CNC machine results in downtime for the machine, and can be very costly to the shop owner. Every shop is concerned about crashing their CNC machines. - ANS True The quickest way to stop a machine in an emergency is: - ANS Press the Emergency Stop button If the cutting tool is in the middle of a cut, and you hear a noise that you are unfamiliar with or do not like, and you need to stop the machine, it is best to press: - ANS Feed Hold One of the differences between Emergency Stop and Feed Hold is that with Feed Hold, all machine motion stops. - ANS False A benefit of using Feed Hold is: - ANS The machine does not return to the first line of code in the program, but retains its position wherever you paused the machine motion 7 The use of Feed Hold puts the machine into a hold or pause mode, and remains in that mode until you press Cycle Start. - ANS True If you press Feed Hold or E-Stop, it is extremely important to contact your Supervisor before resuming operation, to ensure you get back up and running safely. - ANS True The Reset key gets used a lot on a Haas control. The Reset key: - ANS Exits all alarm states, including those generated when you press E-Stop