Variable Speed Stepped Pulleys
Speed-pulleys used for lathes and other mechanical tools, for varying the speed according to the work operated upon.
Only the input is driven; every other part of this model moves by physics (MuJoCo), and its ratios are measured. Run it live, change its parameters, or switch the friction off to see the output stop.
- Modelled as
- belt (friction; 64-link steel band, 40 N) on 2 four-step cones in opposite order, band position = variant
- Measured
- band on each of the 4 step pairs → ω_driv/ω_driver 2.376 / 1.340 / 0.731 / 0.404 against 2.455 / 1.361 / 0.735 / 0.407 (0.5–3.2% creep), belt dev 0.13, lateral 0.00, pen ≤1.3 mm; μ≈0 control 0.0000
- Notes
- Only the top cone is motor-driven. The four band positions are passive variants (all four tested); the render shows the second one, as drawn. Steps are drawn 4.4 wide but only the band's 1.2 collides.
Film (MP4) · GIF · Still (PNG) · Spec (YAML) · Model (MJCF)
