By Dorian Yannic. Electrical Wiring. Publised at Saturday, September 30th 2017, 19:13:18 PM. However, the SMT components and the traces must be at least 3.00 mm from the perforation holes. This prevents the damage to the PCB or components which can occur due to surface stress and splinter when separating the boards. One drawback with this method is that it may leave some unwanted board protrusions on the edges.
By Mailys Laurent. Car Wiring. Published at Monday, February 19th 2018, 21:49:38 PM. Label wires before cutting them when working on a section of the loom. Before you disconnect anything, make absolutely sure you know how to put it back. Number both sides of each connection with labels made of masking tape. If necessary, make drawings of cable routes and how clips fit. Use a craft knife or razor blade to cut away the wrapping from the damaged section. Take care not to cut into the plastic cable insulation.
By Olivier Constance. Electrical Wiring. Published at Monday, February 19th 2018, 05:58:07 AM. Fixtures are more suited for the flexible circuit boards as well as the fragile and thin PCBs. However, each new board design requires its custom fixture which can take between three and four days for a manufacturer to produce and deliver. As such, using fixtures can add up the costs and time to produce the PCBs.
By Olivier Constance. Electrical Wiring. Published at Monday, February 19th 2018, 03:41:02 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 France Barbara. Car Wiring. Published at Sunday, February 18th 2018, 17:58:15 PM. When the clutch pedal is released, the thrust bearing is withdrawn and the diaphragm-spring load once again clamps the driven plate to the flywheel to resume the transmission of power. Some cars have a hydraulically operated clutch. Pressure on the clutch pedal inside the car activates a piston in a master cylinder, which transmits the pressure through a fluid-filled pipe to a slave cylinder mounted on the clutch housing. The slave-cylinder piston is connected to the clutch release arm.
By Claudine Nicolette. Electrical Wiring. Published at Saturday, February 17th 2018, 21:58:32 PM. Generally, the fixture materials, which range from synthetic plastics and stones to aluminum alloys and epoxy glass, should be electrostatic neutral, and able to withstand repeated thermal cycles and chemicals without deforming or wear. In particular, the thin fixtures provide better thermal management.
By Olivier Constance. Electrical Wiring. Published at Saturday, February 17th 2018, 18:11:50 PM. V-groove panelization involves cutting a third of the board’s thickness from the top and bottom sides. The remaining part joins the separate boards and is then cut with a machine during the depaneling. This helps to reduce the stress on the PCB. One challenge with the V-groove method is that it is restrictive and cannot be used with PCBs that have overhanging components over the edges.
By Olivier Constance. Electrical Wiring. Published at Saturday, February 17th 2018, 11:30:49 AM. I always prefer to maintain a logical flow of signals and functionality in my PCB layouts. I think that this approach results in an easier design process and a better board. The AWG layout progresses from left to right: from power input and communication input/output, to the power supply circuitry, to the processor, to the DAC (which is controlled by the processor and constitutes the board’s transition from digital to analog), to the analog signal-conditioning circuitry, and finally to the output connector. Parts that don’t have a specific position in the functional flow—such as the oscillator (U4), the DAC’s passives (C16, R5, etc.), and the voltage reference (U3)—are arranged near the components that they support.
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