Following your repair procedure, you found the motor runs far too hot. Previously, we identified external factors that may be causing this. Now let’s take a look at some conditions under which the motor must work harder to turn a given load.
• Misalignment. You used a laser alignment tool to verify that the motor’s perfectly aligned to its base. But what about the load? A misalignment on the load side of the coupling may show up in binding or friction in the coupling (increased load).
• Flexing. This can occur during normal operation but not appear during a static alignment test. Under certain load conditions, there is horizontal and/or vertical displacement of part or all of the motor system. For example, the motor base twists.
• Vibration. Your vibration analyzer shows vibration is in limits during that single point in time when you check. But what about two hours later, when processes have run and conditions are different? Under differing load conditions, you can go from minimal vibration to high vibration. Installing a vibration monitor is essential to countering this issue.
