Nerf Ultra low cost Bearing SCAR DS-ULC
Description
Document Authorization Description: The design is all open source. The core idea is to use the willow nail feature to replace the bearing to reduce the cost. You can obtain all the core documents of the design, but this does not mean that you have the design. The design follows the CCNC protocol and open source communication. Neither the design nor the derivative of non principle changes of the design can be used for commercial purposes. This design is specially opened for commercial use free of charge after being signed in China (ds-ulc axis tube), and the final right of interpretation belongs to dsfrick. Document description: This design is divided into two parts: core and shell skin; The shell part is open source and can be modified at will to add personal identification; The core part can be modified and adjusted according to your own needs, but please keep the signature to indicate "DS -"; File list: If you need STP assembly documents, you can directly contact me to explain the purpose~~ The core provides two types of calculation, which are suitable for different transmitters: Naming rules: DS signature x angle 10 h high extrusion s low extrusion C front mounted copper sleeve axis tube This design uses the ball head locking mechanism for nondestructive installation, which can support pipes with an outer diameter of 16.8mm to 15.5mm; Hardware Description: M2.5 * 2.5 brass corns and M1.5 * 10 stainless steel pins are used for hardware, and 12 pairs are used for xhc; Xsc uses 15 pairs; The following figure shows my purchase link: how low the cost will be depends on your ability, Print instructions: In order to ensure the smoothness of the inner wall and thread, I personally recommend that the layer height is 0.1mm and the wall thickness is 1.2mm, filled with 30% straight line. At the same time, in order to ensure the normal operation of the locking mechanism, it is recommended to use PLA +, PETG, PA, PC, ABS + and other ductile materials. The thread and parts have been adjusted for my own printer. Theoretically, there is no need to polish and ream after forming. If your printer has poor accuracy, you can use 1.5mm drill bit, 22m reamer, etc. to polish and correct. About model selection: Different from the traditional bearing line pipe, with the help of the eccentric characteristics of willow nails, the extrusion force will change dynamically according to the speed, and the corresponding angular speed and extrusion calculation interval are as follows: 10 degree high extruded positive axis tube with 4 rows of axes: Suitable for hand pull or electric cylinder transmitter HC parameters: diameter change 12.066 to 13.154, angular velocity deformation tolerance 288.4fps; Reducing diameter 12.82 to 13.25, angular velocity deformation tolerance 178.9fps; If you have a good nose, you can reduce the number of wheel sets and reduce the degree of extrusion and rotation; 10 degree low extrusion positive axis tube with 5 rows of axes: Suitable for flywheel, low speed hand pull and electric cylinder transmitter SC parameters: diameter change 12.27 to 13.21, angular velocity deformation tolerance 227.4ps; Reducing diameter 12.55 to 13.52, angular velocity deformation tolerance 142.8fps; If you have a good nose, you can reduce the number of wheel sets and reduce the degree of extrusion and rotation;
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