Private Webinars - EASA | The Electro•Mechanical Authority
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How to schedule

To schedule private education for your group, contact:

Dale Shuter, CMP
Meetings & Expositions Manager

+1 314 993 2220, ext. 3335
dshuter@easa.com

1 hour of training

$300 for EASA Chapters/Regions
$400 for member companies
$800 for non-members

How a webinar works

All EASA private webinars are live events in which the audio and video are streamed to your computer over the Internet. Prior to the program, you will receive a web link to join the meeting. 

The presentation portion of the webinar will last about 45 minutes, followed by about 15 minutes of questions and answers.

Requirements

  • Internet connection
  • Computer with audio input (microphone) and audio output (speakers) appropriate for your size group
  • TV or projector/screen

Zoom logo

The Zoom webinar service EASA uses will ask to install a small plugin. Your computer must be configured to allow this in order to have full functionality. Please check with your IT department or company's security policy prior to scheduling a private webinar.

Private Webinars

EASA's private webinars are an inexpensive way to bring an EASA engineer into your service center, place of business or group meeting without incurring travel expenses or lost production time.

Adjusting End Play on Vertical Pump Motors

Adjusting End Play on Vertical Pump Motors

This video walks through the steps to adjust and set end play on a typical vertical hollow shaft pump motor. Proper end play adjustment is important to keep the lower bearing from supporting the weight of the rotor and to allow for thermal growth within the motor.

The motor in this video has a thrust bearing in the top and a standard ball-type guide bearing in the bottom, which is typical of vertical pump motors. There are other bearing arrangements with somewhat different procedures for setting end play, but here we’ll be working with the most common arrangement and procedure. There are variations of this process, and some vertical pump motor bearing arrangements require special procedures, especially those with springs mounted under a spherical roller thrust bearing.

Topics covered include:

  • Tools and supplies needed
  • Basic principle of end play adjustment
  • How to adjust end play
  • How to measure and verify proper end play

How to Measure Magnet Wire

How to Measure Magnet Wire

This video shows one step in collecting motor winding data: how to measure magnet wire. A service center could use this data to:

  • Duplicate an original winding
  • Verify that a previous rewind was done correctly
  • Serve as a basis for redesigning a winding
  • Store recorded data for future reference

 

Helpful tools

How to Set Brush Neutral on a DC Machine

How to Set Brush Neutral on a DC Machine

This video shows how to adjust the brush neutral position of a DC machine to prevent sparking at the brushes at full load. An accurate neutral setting promotes good commutation and efficient machine operation. It also minimizes commutator wear while maximizing brush life. For this video, we’re using the AC method of setting brush neutral.

Lubricating an Open Ball Bearing During Assembly of an Induction Motor

Lubricating an Open Ball Bearing During Assembly of an Induction Motor

This video shows the proper way to lubricate the deep-groove, open ball bearing before assembling a horizontal induction motor. With horizontal induction motors, we normally do this step after we've installed the bearings on the shaft, and just before we install the end brackets.

Some of what is covered includes:

  •  Steps for lubricating the shaft-mounted open bearing and
  •  How to lubricate the bearing housing as the last step before we put the end bracket on

Note that in this video we're lubricating an open ball bearing. But the procedure for roller bearings or grease-lubricated thrust bearings is going to be essentially the same.

Measuring a Bearing Journal

Measuring a Bearing Journal

This video explains how to measure the diameter of a bearing journal accurately to within five hundred-thousandths of an inch or one-thousandth of a millimeter. This critical step will determine if the shaft needs any repairs for proper bearing fitment.

Topics covered include:

  • Tools and supplies needed
  • How to validate micrometer accuracy
  • Minimum number of measurement locations
  • How to measure a bearing journal

Performing an Insulation Resistance Test

Performing an Insulation Resistance Test

This video explains how to check the ground insulation of an AC motor winding using the insulation resistance (IR) test. The IR test is usually the first electrical test because it indicates if the motor winding can withstand further testing, or the machine can return to service. This video shows:

  • How to select the megohmmeter and IR test voltage
  • How to connect the megohmmeter to the winding and ground the leads
  • How to perform the IR test and for how long
  • How to safely discharge the winding
  • How to correct the IR test result to the standard temperature of 40°C and determine if it is acceptable

Seating Carbon Brushes on a DC Machine

Seating Carbon Brushes on a DC Machine

This video shows the proper procedure for seating carbon brushes in a DC machine. If this step is not performed correctly, the brush neutral position of the DC machine will gradually change as the brushes wear in. This can cause:

  • Poor commutation
  • Sparking of the brushes
  • Rapid brush wear
  • Damage to the commutator

Seating carbon brushes in a DC machine is a critical process to ensure optimal performance and longevity of the brushes and the machine itself. The purpose of seating carbon brushes is to achieve a proper contact interface between the brush and the commutator or slip ring. This involves the following key objectives:

  • Maximize Contact Area: Proper seating ensures that the brush has the maximum possible contact area with the commutator or slip ring. This helps in reducing the contact resistance and ensures efficient current transfer.
  • Uniform Wear: Seating helps in achieving uniform wear across the brush face, which is essential for maintaining consistent performance and extending the life of the brush.
  • Reduce Electrical Noise: A well-seated brush minimizes electrical noise and sparking, which can otherwise lead to damage or interference in the machine's operation.
  • Stability and Performance: Proper seating contributes to the stability of the brush in the holder, ensuring that it maintains a stable electrical contact even under varying operational conditions.

Overall, seating is a preparatory step that helps in aligning the brush to the contour of the commutator, thereby optimizing the electrical and mechanical performance of the DC machine.

Testing Interpole Polarity on a DC Machine

Testing Interpole Polarity on a DC Machine

This video will walk you through how to check the relative polarity of DC machine interpoles and the armature and correct it if necessary using a simple interpole polarity test.

It's important to perform this test after any DC machine repairs or routine maintenance activities where the brush lead to the brush holders might accidentally be switched. If undetected, this will cause severe brush sparking or even flashover as the motor is loaded.

Some topics covered include:

  • How to verify whether or not the intpole polarity is correct
  • How to diagnose and remedy Interpol polarity problems, including misconnected or incorrectly sequenced inner poles
  • How to check for too many or too few interpol circuits

The video also has bonus tips about equalizing jumpers.

Using an Induction Heater to Install Interference-Fit Bearings

Using an Induction Heater to Install Interference-Fit Bearings

This video demonstrates the correct way to use an induction bearing heater to install an interference fit ball bearing on a machine shaft.

This video covers:

  • Work area cleanliness
  • Shaft inspection and preparing the shaft
  • Pre-assembly tips for handling the bearings
  • How to use an induction bearing heater to expand the bearing for mounting
  • How to monitor the bearing temperature
  • How to install a heated bearing safely