PdMA - A Leader in Electric Motor Testing
  Tip of the Week Archives
  Product Support Manual

ISO Certication 9001
You Tube
Visit our You Tube channel.
Linkedin Logo
Join us on Linkedin.


Tip of the Week

Machine Train for March - Part 2: Belts

Continuing the focus on the machine train analysis tools of the EMAX Current Demodulation technology, this week we will discuss belts. A variety of issues can develop related to a belt or sheave and knowing what to look for may allow us to correct the problem before damage occurs. A defective belt, out of round sheave, or angular/axial misalignment of the sheaves will elevate belt related frequencies and can be seen on the current spectrum. Belt Frequency = 3.142 (D/L) X (RPM/60) Where D is the diameter of the motor mounted pulley, L is the length of the belt, and RPM is the motor speed. Another easy way to identify the belt frequency is using a strobe light. Once you have identified belt frequency, the next step is to establish a band alarm around that frequency to support speed/load changes. Increases in the amplitude of belt frequency, or multiples of belt frequency can be trended for analysis.

Click Here to read an application note with a case study describing the use of current demodulation for belt frequency machine train analysis.


Submit an Electric Motor Testing Tip of your own and receive a free PdMA mug or hat if we publish it! Contact Lou.



Machine Train for March - Part 2: Belts
March 19, 2018
Click here to read more.

Click Here to Read More Tips

Learn More - Videos

Click on a topic below to watch a short video of the subject.


Fault Zones
Power Circuit Fault Zone
Power Quality Fault Zone
Rotor Fault Zone
Stator Fault Zone
Air Gap Fault Zone
Insulation Fault Zone

Case Studies
Click Here to View Case Studies


PdMA Announces the Release of PdMA Cloud Services
To read more about the release click here.

2018 Training Schedule Posted
The PdMA® training schedule for 2018 has been posted.
Click here to view the schedule

PdMA® Corporation Releases MCEGold® 3.0
To read more about release click here

2014 Best Asset Condition Management Program Winner
Click here to read about the winner.

PdMA® Corporation Releases MCEGold® 2.6.2
To read more about release click here.

Announcing the New M-Series MCEMAX® Tester
To read more about the release click here.

Introducing MTAP3
The affordable MTAP3 offers the ability to safely capture data in many of the smallest enclosures where the MTAP2® cannot be installed.
Click here to learn more.

Click Here
to Read More News.