JOG in Pumps: Definition & Explanation

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SUMMARY

The term "jog" in the context of pumps refers to the momentary application of power to an electric motor to determine its rotational direction. This technique is essential when installing a three-phase electric motor, as the initial connection does not indicate the rotation direction. Jogging, also known as "bumping," is utilized not only for direction verification but also for checking belt alignment and other operational checks. The jog terminal provides a signal that initiates brief motor movement, ceasing when the signal is removed.

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  • Understanding of three-phase electric motors
  • Familiarity with motor rotation and wiring configurations
  • Knowledge of mechatronics terminology
  • Basic electrical safety practices
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  • Research the wiring configurations for three-phase motors
  • Learn about motor control techniques in mechatronics
  • Explore troubleshooting methods for motor direction issues
  • Study the applications of jogging in various industrial systems
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Engineers, technicians, and maintenance personnel involved in the installation and operation of electric motors, particularly in industrial settings where pumps and mechatronic systems are utilized.

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I have read somewhere about "jogging/jog" of pumps .Is it something to do with starting of a pump?
 
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Generally it refers to applying power to the electric motor momentarily. For example, it is often done to see which direction the motor and hence the pump is rotating. When you install a 3 phase electric motor, it can rotate in either direction depending on how power is connected and unfortunately, there's no way of telling which way it will spin when it's turned on. So once power is connected, the motor is often jogged (also called "bumped") to see which way it turns. If it turns in the wrong direction then swapping any of the 2 wires will reverse the rotation. The motor may also be jogged to check belt alignment or for other reasons.
 
RKD89 said:
I have read somewhere about "jogging/jog" of pumps .Is it something to do with starting of a pump?

"Jog" is a term meaning to momentarily move a motor. The jog terminal is a connection that, when provided with a signal, causes momentary movement of the motor. Movement is ceased when the signal is removed.

It's a common industry term for mechatronics but usually refers only to axes (or motors) which have cyclic movement (like a pump, transport belt, rotary cutter, etc.) and not to linear motions (like a robotic arm or linear actuator).
 
Thanks guys...
 
I have encountered a vertically oriented hydraulic cylinder that is designed to actuate and slice heavy cabling into sections with a blade. The cylinder is quite small (around 1.5 inches in diameter) and has an equally small stroke. The cylinder is single acting (i.e. it is pressurized from the bottom, and vented to atmosphere with a spring return, roughly 200lbs of force on the spring). The system operates at roughly 2500 psi. Interestingly, the cylinder has a pin that passes through its...

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