The procedure for doing reverse dial indicator alignment is not a difficult one. There are several steps that need to be taken for a successful alignment job. These steps are broken up for easier navigation on the web. Print topics by selecting print on your browser.
Step 1: Familiarize with terms, techniques, and, procedures.
*Follow all safety rules and procedures*
Step 2: Learn about the machine you are aligning.
a. Visually check coupling, pipe hangers, base bolts, coupling spacing etc.
b. Check for coupling & shaft run out
Step 3: Know the characteristics of your tool.
Perform a Sag Check
Step 4: Prepare the machine.
a. Remove all existing shims from under the feet
-if old shims are to be used, clean them thoroughly.
-always use the minimum amount of shims.
b. Clean the base thoroughly.
-scrape and file away all rust, nicks, and burrs
c. Examine the base bolts and holes.
-re-tap if necessary
-replace bolts if necessary
Step 5: Installation of alignment brackets
a. Clean mounting surface, file off nicks and burrs.
b. Check indicators for sticking and loose needle.
c. Aim the indicator stem directly toward the center line of the shaft.
Step 6: Measurement
a. Measure the distance between the two indicators.
b. Measure the distance between the indicator and front feet.
c. Measure the distance between front and back feet.
Step 7: Layout graph paper
a. Mark indicator position
b. Mark feet position.
- Remember to mark + and - signs (this eliminates confusion)
Example: graph layout
Step 8: Preliminary Horizontal Move
Click here for horizontal move instructions
Step 9: Check for Soft Foot
Step 10: Perform Vertical Move
Click here for vertical move instructions
Step 11: Tighten all bolts and recheck indicator readings.
Step 12: Remove alignment brackets.
The more you become familiar with these steps the faster you will be able to align your machinery.