How an MPCB combines short-circuit and adjustable overload protection for a motor, how it compares with breakers and overload relays, and how to set it.
What flush (shielded) and non-flush (unshielded) proximity sensors are, how much range each gives, and how to mount them so they don't false-trigger.
Mechanical limit switches and non-contact proximity sensors compared on life, speed, environment, wiring and cost, with a guide to choosing.
Steppers are simple and cheap; servos are fast, closed-loop and efficient. A side-by-side comparison and a checklist for choosing between them.
A PLC runs the machine; an HMI lets people see and adjust it. How they differ, how they fit with SCADA, and when an all-in-one PLC + HMI makes sense.
Size a variable frequency drive by motor current, load type, supply and environment. Includes a worked example and a sizing checklist.
How the three main photoelectric sensing modes work, their ranges and weak spots, and how to choose the right one for your target.
Inductive sensors detect metal; capacitive sensors detect almost anything, including plastic, liquids and powders. How each works, typical ranges, and how to choose.
PNP sensors switch the positive supply to the load; NPN sensors switch the load to 0V. Here is how to tell them apart, how to wire each, and which one your PLC needs.
