Wholesale Distributors for EN 14399-4 and 8 Structural Bolt Set for Proloading for Mozambique Factory
Short Description:
BS EN 14399-4 and 8 System HV Structural Bolt Set for Preloading DIN EN 14399-4 and 8 System HV Structural Bolt Set for Preloading Thread Size: M12-M36 with various length Grade: Bolt-10.9, Nut-10, Washer-300~370HV Finish: Black Oxide, Zinc Plating, Hot Dip Galvanized, Dacromet, and so on Packing: Bulk about 25 kgs each carton, 36 cartons each pallet Advantage: High Quality and Strict Quality Control, Competitive price, Timely delivery; Technical support, Supply Test Reports Please feel free ...
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Wholesale Distributors for EN 14399-4 and 8 Structural Bolt Set for Proloading for Mozambique Factory Detail:
BS EN 14399-4 and 8 System HV Structural Bolt Set for Preloading
DIN EN 14399-4 and 8 System HV Structural Bolt Set for Preloading
Thread Size: M12-M36 with various length
Grade: Bolt-10.9, Nut-10, Washer-300~370HV
Finish: Black Oxide, Zinc Plating, Hot Dip Galvanized, Dacromet, and so on
Packing: Bulk about 25 kgs each carton, 36 cartons each pallet
Advantage: High Quality and Strict Quality Control, Competitive price, Timely delivery; Technical support, Supply Test Reports
Please feel free to contact us for more details.
Product detail pictures:
In the past few years, our company absorbed and digested advanced technologies both at home and abroad. Meanwhile, our company staffs a team of experts devoted to the development of Wholesale Distributors for EN 14399-4 and 8 Structural Bolt Set for Proloading for Mozambique Factory, The product will supply to all over the world, such as: India, Barcelona, Palestine, Many years of work experience, we have realized the importance of providing good quality products and the best before-sales and after-sales services. Most problems between suppliers and clients are due to poor communication. Culturally, suppliers can be reluctant to question things they do not understand. We break down those barriers to ensure you get what you want to the level you expect, when you want it. faster delivery time and the product you want is our Criterion .
The STM32 Discovery dev board is used to read an SPI serial interface magnetic absolute angle sensor and drive PWM and DIR signals to an H-bridge for a brushed gear-motor directly coupled to the weighted base. Sample loop is 1024 Hz and the PWM frequency is approximately 8 kHz. A brass and PTFE composite thrust washer is used between the gearbox face and the 6061 aluminum hub of the weighted base.
The beam is dual-ball bearing mounted on a 3/8″ vented cap screw, which is fastened to the rotating platform with a nylon insert lock nut. The vented cap screw allows signal wires to pass through to the angle sensor fixed at the other end of the mount screw. Neodymium magnets are fixed to the beam on an aluminum bracket over the angle sensor.
The gearbox has experienced accelerated wear, likely do to half of the planetary gears being nylon despite being specified in the sales literature as metal. It has been rebuilt several times, with thrust washer moved in the gear stack, and exhibits a “detented” non-linearity while rotating. The PID must compensate for this as well.
The Raspberry Pi is used to update PID loop gains through an SSH terminal WiFi user interface, and generate live plots of the angle and PWM data using gnuplot and NGINX web server. Wireless interfaces allow for full continuous 360 degree rotation to balance the beam.
The Raspberry Pi and STM32 Discovery communicate using bidirectional UART serial. Processing is otherwise completely independent and parallel.
The project is used to demonstrate Zigler-Nichols and other PID tunings. The coefficients used are from the Wikipedia article on Zigler-Nichols tuning method.
