Equal arm lever teaching aids

Model Design Overview:

An equal-arm lever model ideal for classroom demonstrations, the model expands to 50cm in width ensuring excellent visibility even for students in the rear. (PS. The competition title in Chinese was "Physics Teaching Aids," leading me to believe it required the design of teacher's tools. Upon seeing the English version, it turned out to be a "Physics Teaching Model"... /(ㄒoㄒ)/~~)

Model Usage Overview:

• The model is available in monochrome and multicolor versions. The monochrome version features recessed lines and markings for easy hand-painting or multi-color printing with planar color settings. The multicolor version lacks these recesses, with multiple colors integrated into a single planar design.
• The main support structure can optionally utilize a single 608ZZ bearing for smoother operation compared to the bearing-less version.
• Balancing screw rods are integrated into either side of the lever arm, adjustable via balancing nuts. Installation is generally unnecessary on a level surface; however, it is recommended for adjustment on uneven surfaces. Each balancing nut is pre-set to weigh 5g (using PLA filament); this may vary depending on the filament type, and fill percentage can be adjusted to modify the weight.
• The model includes three types of weights with hook weights of 10g, 20g, and 50g (using PLA filament). My printed weights showed an error of ±1g (using a kitchen scale O(∩_∩)O). Adjust infill and layer height as needed to fine-tune the weights.