Reverse alignment method

This course begins with the fundamental principles behind shaft to shaft alignment and concludes with students conducting a series of alignment exercises using conventional alignment tools. Two methods will be covered: straight edge alignment , and reverse dial (cross-dialing) alignment. A rough alignment is necessary due to the range limitations of the dial indicators. A popular method used for years and is still in use today is the rim and face method.

This shaft alignment video presents the most basic concepts of alignment.

The two most common dial indicator alignment methods are the rim-face and reverse rim dial methods. In this method two dial indicator ( rim and face dial ) are used to determine the relative position of movable shaft with respect to stationary shaft. Another measurement is taken on the face of the coupling to determine shaft angularity.

When using a reverse dial method , two measurements are taken on the rims of the couplings to determine shaft offset at two points. Prueftechnik are specialists in the alignment and monitoring of rotating. This method often requires the machines to be uncoupled to perform alignment.

Obtain as-found readings.

Determine the vertical foot positions. Make vertical corrections. Re-measure and record final alignment values. Mounting the dial indicator fixtures. The method was first used with dial indicators, but now the term reverse indicator is descriptive of the method of obtaining the numbers x and y, rather than the measuring devices themselves.

Today, all laser alignment systems use the reverse -indicator method or one of its variations. The procedure for doing reverse dial indicator alignment is not a difficult one. There are several steps which 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. Use for shaft alignment by reverse indicator method. For horizontal alignment , after vertical alignment is resolve then, the usual field practice is to set the two dials and both horizontal ends at zero reading then rotate 180deg. Additionally, reverse dial alignment does not require removal of the coupling to collect data. Familiarize with terms, techniques and procedure.

Learn about the machine you are aligning.

For each set of data, ensure the data is mathematically valid. Alignment Methods — Poor, Fair, Good and Best. When perfect alignment is obtained for vertical and horizontal planes, remove all equipment. This course teaches alignment principles (applicable to all methods and machinery) in practical, easy to understand terms and also provides hands-on experience performing precision alignment. REVERSE INDICATOR METHOD ALIGNMENT AND COUPLINGS The reverse indicator method is another shaft alignment method.

It uses two dial indicators, one on each shaft, to measure the parallel and angular misalignment as shown in Figure 2-1. All measurements are taken on the rim of the coupling hubs. The rim and face alignment method is commonly used where space considerations would prevent the use of the cross dial or reverse dial methods. Reverse indicator setup.

It also is the only method that can be used when rotation of both shafts cannot be accomplished. What alignment method is it when two dial indicators are used to take rim readings to determine misalignment of the shafts? Shaft alignment is one of the major problems related to machinery with shaft coupling.

However, the task of shaft allignment can be made easy by following a few guidelines.