By Dorian Yannic. Motor Wiring. Publised at Friday, November 10th 2017, 03:07:38 AM. Servomotors are used for both high-end and low-end applications. On the high end are precision industrial components that use a rotary encoder. On the low end are inexpensive radio control servos (RC servos) used in radio-controlled models which use a free-running motor and a simple potentiometer position sensor with an embedded controller. The term servomotor generally refers to a high-end industrial component while the term servo is most often used to describe the inexpensive devices that employ a potentiometer. Stepper motors are not considered to be servomotors, although they too are used to construct larger servomechanisms. Stepper motors have inherent angular positioning, owing to their construction, and this is generally used in an open-loop manner without feedback. They are generally used for medium-precision applications.
By Olivier Constance. Electrical Wiring. Published at Thursday, December 28th 2017, 07:48:26 AM. Panelization is the arranging of arrays of multiple PCBs onto a single substrate that fits in the standard processing machine. A panel may hold multiple boards with similar or different sizes and shapes. This method is faster and less costly compared to the fixtures, which require a custom carrier for every new PCB design.
By Fleurette Nina. Motor Wiring. Published at Thursday, December 28th 2017, 05:54:53 AM. Speed control via a governor is another type of servomechanism. The steam engine uses mechanical governors; another early application was to govern the speed of water wheels. Prior to World War II the constant speed propeller was developed to control engine speed for maneuvering aircraft. Fuel controls for gas turbine engines employ either hydromechanical or electronic governing.
By Fleurette Nina. Electrical Wiring. Published at Thursday, December 28th 2017, 05:52:53 AM. SMT fixtures are rigid PCB carriers that allow manufacturers to load single or multiple irregular boards, and then take them through the standard processing machines. This makes it possible to carry out tasks such as automatic mounting of electronic components, infra-red reflow soldering, wave soldering, automatic testing, etc.
By Mailys Laurent. Electrical Wiring. Published at Thursday, December 28th 2017, 05:20:31 AM. Sensirion provides detailed information on both the package outline and the land pattern. In fact, it is recommended, because the IC pad pitch is just 0.5 mm, that only one solder mask opening should be used for all four pads on one side. It is also suggested, when using solder paste printing, that a laser-cut stainless steel stencil with trapezoidal walls and with a stencil thickness of 0.1 or 0.125 mm should be used. See the images below. This information should be quite helpful for a PCB layout design team.
By Cyrille Lothaire. Electrical Wiring. Published at Thursday, December 28th 2017, 05:00:05 AM. The decoupling capacitors (C4, C5, C6, C7, C9, C10, C11) are arranged around the perimeter of the chip, very close to their respective power pins and to the vias that connect the caps to the internal planes. Notice how the smaller cap is always closer to the power pin; this is because we rely more on the lower-value capacitor for high-frequency bypassing, and thus the first priority is minimizing the inductance and resistance between the smaller cap and the pin.
By Adrienne Emmanuel. Car Wiring. Published at Thursday, December 28th 2017, 03:09:28 AM. Cut out all the damaged wires with wire cutters. Spread out the cuts across a bundle of several wires: if many joins are opposite each other their bulk may make it difficult to fit the loom into the car. If possible, replace wiring with new wire of the same colour. The new wire must be the right size: there are five sizes, depending on current rating. Repairs in wrapped sections of the loom are the only places where you may join wires by twisting them together and soldering the joint mainly because there may not be room for any other method.
By Claudine Nicolette. Electrical Wiring. Published at Thursday, December 28th 2017, 00:08:10 AM. Care should be taken when depaneling the perforated-tab PCB array; otherwise, an incorrect method will splinter or tear the solder-mask or active surface layer. The ideal breakout method should not cause any damage to the board or transfer stress from the PCB surface to the components.
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