Filter the results

Enter one or more words to find resources containing any of the words entered
Enter words or phrases between " " to find exact match

Article includes ...

Type of resourceTechnical topicLanguageIndustry publicationPaid Product But Free For EASA MembersPublication date

Search Clear

Resource Library

Article

Achieving proper alignment by detecting and correcting soft foot

May 2016
Number of views: 10547
Article rating: 5.0

Gene Vogel
EASA Pump & Vibration Specialist

Proper alignment of direct-coupled machinery is an essential element in reliability of a new or repaired machine (motor, pump, gear case, etc.). One common impediment to achieving proper alignment and smooth operation is a “soft foot” condition.

A soft foot occurs when all the feet of a machine case do not sit flat on the supporting base so that tightening the foot bolts causes distortion of the machine case. The source of the soft foot could be a baseplate which is not flat or machine feet which are distorted. Not only does this make it difficult to align the machine, but the casing distortion may add additional load to the bearings and create internal misalignment between the rotating and stationary elements of the machine resulting in poor performance and increased vibration.

LOGIN TO VIEW AND DOWNLOAD THE ARTICLE

AVAILABLE IN SPANISH

ANSI/EASA AR100

More information on this topic can be found in ANSI/EASA AR100

Section 4: Testing

Related Reference and Training Materials

Principles of Medium & Large AC Motors (NEMA Standards)

Section 13: Motor Alignment, Vibration & Noise

Principles of Medium & Large AC Motors (IEC Standards)

Section 13: Motor Alignment, Vibration & Noise

Mechanical Repair Fundamentals of Electric Motors

Section 12: Vibration & Motor Geometry

Categories: AC motors, Alignment, Base/soleplate/foundation/mounting, DC motors, Frame, Couplings, Repair procedures & tips

Tags: Alignment Soft foot

Rate this article:

5.0

PREVIOUS ITEM

NEXT ITEM

Comments are only visible to subscribers.

Getting The Most From Your Electric Motors

Getting The Most From Your Electric Motors - cover This 40-page booklet provides great advice for obtaining the longest, most efficient and cost-effective operation from general and definite purpose electric motors.

This booklet covers topics such as:

Installation, startup and baseline information
Operational monitoring and maintenance
Motor and baseline installation data
How to read a motor nameplate
Motor storage recommendations

LEARN MORE AND DOWNLOAD MÁS INFORMACIÓN Y DESCARGAR BUY PRINTED COPIES

EASA/AEMT Rewind Study

The Effect of Repair/Rewinding on Premium Efficiency/IE3 Motors
Tests prove Premium Efficiency/IE3 Motors can be rewound without degrading efficiency.

DOWNLOAD THE FULL RESULTS

ANSI/EASA AR100-2020

ANSI/EASA AR100-2015 cover

Recommended Practice for the Repair of Rotating Electrical Apparatus
This is a must-have guide to the repair of rotating electrical machines. Its purpose is to establish recommended practices in each step of the rotating electrical apparatus rewinding and rebuilding processes.

DOWNLOAD - ENGLISH

DESCARGAR - ESPAÑOL

EASA Technical Manual

EASA Technical Manual cover

Revised September 2022
The EASA Technical Manual is the association's definitive and most complete publication. It's available FREE to members in an online format. Members can also download PDFs of the entire manual or individual sections.

VIEW & DOWNLOAD