cross dial alignment

Question 1

cross dial method uses two dial indicators mounted 180 deg across from each other true or false

Answer 1

true

Question 3

What is horizontal alignment in machinery?

Answer 3

Horizontal alignment is changed by shifting the machine sideways using jack and bolts mounted on the machine base.

Question 4

What elements are adjusted for horizontal alignment?

Answer 4

Correct, offset, parallel, and angularity in the vertical and horizontal planes.

Question 5

What is the recommended distance between dials in a typical cross dial setup?

Answer 5

Four times the shaft diameter(minumium)

Question 6

In a typical cross dial setup, where is the A dial positioned?

Answer 6

On the fix coupling at 12 o’clock

Question 7

In a typical cross dial setup, where is the B dial positioned?

Answer 7

On the machine to be shimmed at 6 o’clock

Question 9

What is the main task related to rough alignment?

Answer 9

Ensure that the dial plungers make contact with the coupling rim throughout a full 360° rotation

Question 10

What should you do after rough alignment?

Answer 10

check for soft foot

Fine-tuning involves making precise adjustments to ensure optimal alignment.

Question 11

what is the validity rule

Answer 11

the sum of 3 o’clock and 9 o’clock dial positions must add up to 6 and 12 o’clock before bar sag

Question 12

How should dials be mounted?

Answer 12

180° and perpendicular to the surface they are measuring from

Question 14

What is the first step in aligning two machine shafts

Answer 14

Alignment should be done first in the horizontal (side to side plane)

This step allows for more accurate vertical readings.

Question 15

What does a positive number as a formula solution indicate?

Answer 15

It means to shift the machine toward the datum point.

Datum is where the dial was originally zeroed.

Question 16

What does a negative value as a solution indicate?

Answer 16

It means to shift the machine away from the datum point.

Question 17

Define ‘datum point

Answer 17

Datum is where the A dial was originally zeroed at.

Question 18

What positions should the dials and brackets be placed in before making corrective shim moves on the MTBS?

Answer 18

3 o’clock and 9 o’clock positions

Question 19

What should be set to zero before making corrective shim moves on the MTBS?

Answer 19

Dial needles

Question 20

What is the purpose of ensuring the jacking bolts are just touching the side of the MTBS?

Answer 20

Keeps the horizontal alignment close