Introduction To CNC Machining Centres 150402a Flashcards
The most obvious difference between a conventional milling machine and a CNC milling machine is the…
Addition of a computer interface
On a CNC Machining Center, you will typically be able to associate the longest axis with the letter…
X
On all Machining centres, a limit or micro switch is placed on the slideways. The purpose of the switches is too…
Prevent overtravel and therefore damage to the ball screw mechanism
Which of the following systems has the most potential to increase productivity?
A twin pallet system
The CNC term adaptive control refers to…
The monitoring of cutting conditions, with the controller making autonomous changes to improve Machining conditions
Which of the following CNC machines lacks any sort of enclosure?
The retrofit CNC milling machine
In order to drill a hole in a workpiece using a vertical milling machine that has a movable spindle, you will need to include a command with a…
Negative Z value
The purpose of the column in a CNC vertical Machining Center is to…
Provide a location for the spindle housing
CNC Drive systems often use recirculating ball screws. Three of the following are advantages for using these components over conventional Acme screw and nut systems. Which of the following is not an advantage?
Reduces friction and wear
Require less Drive power
Higher load carrying capacity
Lower replacement cost
Lower replacement cost
The safety of an employee should be a primary concern at all times when operating a CNC Machining Center. Which one of the following scenarios would be considered potentially unsafe?
An employee has pressed the emergency stop button to remove a workpiece from the holder
Together two employees are lifting a 50-kg workpiece
An employee has put on a ball cap to keep his hair from hanging free
And Apprentice is seen removing metal chips with a chip hook while wearing a pair of gloves
Together two employees are lifting a 50-kg workpiece
