Penna Cement Industries CCR Operator Interview Questions and Answers

A ball screw is a mechanical linear actuator that converts rotational motion to linear motion.

• Consists of a screw and a nut with ball bearings

• Ball bearings roll between the screw and nut to reduce friction

• Used in CNC machines for precise and efficient movement

• Provides high accuracy and repeatability

• Examples: X-axis and Y-axis movements in a CNC milling machine

Angle of thread refers to the angle formed by the helix of a thread with a plane perpendicular to the axis of the thread.

• It is measured in degrees.

• The angle of thread is important in determining the strength and stability of a threaded connection.

• Common angles of thread include 60 degrees for metric threads and 55 degrees for American National Standard threads.

• The angle of thread can also affect the ease of assembly an

To fill offset in a CNC machine, the operator needs to input the correct values for the tool length, diameter, and wear compensation.

• Access the CNC machine's control panel or software interface

• Locate the offset settings menu

• Enter the appropriate values for tool length, diameter, and wear compensation

• Save the offset settings

• Verify the offset values before starting the machining process

To start a CNC machine, follow these steps: power on the machine, load the program, set the workpiece, set the tool offsets, and initiate the machining process.

• Power on the CNC machine

• Load the program into the machine's control system

• Set up the workpiece on the machine's table or fixture

• Set the tool offsets to ensure accurate machining

• Initiate the machining process by starting the program

Vernier caliper least count is the smallest measurement that can be read on the caliper scale. Tolerance is the allowable deviation from the desired measurement.

• Vernier caliper least count is the difference between one main scale division and one vernier scale division.

• It determines the precision of the measurements taken with the caliper.

• For example, if the main scale division is 1 mm and the vernier scale division is...read more