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It is necessary to develop the design of an ergonomic chair/suspension for a worker who works standing for long periods during the repair of wooden pallets. The chair must be attached to the carriage of the ceiling rail system and move with the worker within the working area. The main goal is to partially relieve the load on the legs and back, while the worker's legs predominantly remain on the floor. Key requirements: designed for a user weighing approximately up to 100 kg with the necessary safety margin; adjustability of height and body support level; comfortable transition between standing, semi-sitting, and sitting positions; quick and safe release of the worker from the chair; ability to rotate around a vertical axis; the chair should not restrict the movement of arms and legs; the design should not interfere with a separate carriage with a winch for lifting pallets; provide an independent safety element or another solution against falling; parts must be available for manufacturing from steel, straps, and standard components. Expected results: Several options for the chair concept. Selection and refinement of the optimal option. 3D model of the design. Drawings of parts and assemblies with dimensions. Mounting scheme to the suspension system carriage. List of materials and ready-made components. Strength calculation of the main loaded elements. Files in STEP and PDF formats for further prototype manufacturing. I am looking for a specialist with experience in mechanical engineering, industrial design, ergonomics, or the development of suspension equipment. Preference will be given to a contractor who can not only create a visualization but also prepare a technically sound design for manufacturing and testing. Detailed dimensions of the rail system, photographs, and my developments will be provided to the selected contractor. The project is related to human safety, so the final design must undergo verification by an engineer and testing before use. Important condition regarding patents: There is a similar suspension system from the company Standing Ovation. Its product can only be used as an example of an already known solution, but its design, layout, and operating principle must not be copied. It is necessary to develop an independent technical solution that will have significant structural differences and will not replicate features protected by existing patents of Standing Ovation. I will provide the contractor with the found patent documents for review. During the development, it is necessary to: analyze the known product and propose another way to support the body; not copy the shape of the chair, frame, suspension, adjustment mechanism, and mounting scheme; prepare a brief description of the main technical differences; create a comparison table of the new solution with the Standing Ovation design; provide for the possibility of further patent verification and patenting of the own design. The contractor is expected to deliver a technically independent design; however, the final legal check for patent purity will be conducted by a separate patent specialist.

Need experience with SolidWorks metal doors We will discuss the terms of reference in private ................................................................

We need a design engineer or a spring design specialist with experience in calculating and developing design documentation. Required tasks: calculate spring parameters according to specified technical requirements and samples; select the optimal material according to operating conditions; determine the main geometric parameters (wire diameter, outer/inner diameter, number of turns, pitch, length, etc.) from the provided sample; perform verification calculations (stress, working stroke, resource, safety margin); prepare drawings for further production; provide a specification indicating the material and main technical characteristics. Types of springs: compression springs; extension springs; torsion springs (if needed). Requirements for the performer: experience in spring design; knowledge of standards (DIN, EN, ISO, GOST or similar); understanding of spring manufacturing technology; At the beginning of cooperation: The development of several springs is planned. If the cooperation is successful, long-term collaboration with regular orders is possible.

Develop a control program (G-code) for a CNC milling machine for cutting parts from a solid blank using the nesting method (optimal packing). Initial data: — 3D models of parts in the format you need — Material of the blank: polystyrene — Size of the machine table and blank: 1200×1200×150 mm — Machine: three-axis milling (to be discussed) — Diameter of the cutter: to be discussed — Number of axes: 3 Requirements for the result: — Optimal placement of parts with minimal material waste — Correct allowances for tool diameter (radius compensation) — Technological bridges (tabs) to hold parts during cutting — Order of passes: rough pass → finishing — Post-processor for the specified machine controller — G-code file + screenshot of the trajectory simulation Experience that is mandatory: — Work in a CAM system (Fusion 360 CAM / Mastercam / SolidCAM / ArtCAM or similar) — Experience in nesting parts — Understanding of cutting modes and feeds for specific materials In your response, please specify: — The CAM system you are working in — Machine controllers for which you have written post-processors — An example of a completed similar work

We are looking for a physicist engineer or a design engineer with experience in developing induction chargers, Qi/Qi2, and working in KiCad. We already have: a ready-made wireless charging board for two devices; two coils for charging a phone and headphones; the case design and 3D models. What needs to be done Add a third charging channel for Apple Watch. Select and calculate the coil, electronic components, and connection scheme. Resolve the issue of correct Apple handshake and compatibility with Qi/Qi2. Check if the system can stably charge three devices simultaneously. Calculate the required power of the power supply, heating, and main electrical parameters. Consider the shielding of the coils, as the charger is installed inside a wooden case. Prepare or refine the schematic and PCB in KiCad. Provide recommendations on design, safety, and further certification of the device. We are considering two work formats: full development and preparation of files; engineering consultation with calculations and recommendations that our specialist can implement. Please, when responding, write: whether you have experience with wireless chargers Qi/Qi2; whether you have worked with Apple Watch or MFi components; whether you can perform calculations for coils, power, heating, and shielding; attach examples of similar projects.