Geneva drive
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The prompt
Model a six-slot Geneva drive, assembled, as 2 separate solids: the driver (crank + drive pin) and the Geneva wheel. Frame: both axes parallel to Z; driver axis through (-20, 15), wheel axis through (40, 15) (centre distance 60). Angles in the XY plane from +X toward +Y about each part's own axis. Geneva wheel: plate Ø104, Z=0..8, with six radial slots 8.2 wide, one every 60°. Each slot runs along its centre line from the rim inward and ends in a semicircle whose centre is 28 from the wheel axis. Hub Ø30 on top, Z=8..18; Ø12 bore through Z=0..18. Driver: crank arm 14 wide, Z=-7..-1 (1 below the wheel), from the driver axis to the pin centre, 30 long between centres, both ends rounded R7. Hub Ø24 under the arm, Z=-20..-7, Ø10 bore through Z=-20..-1. Drive pin Ø8 on the arm end, from Z=-1 up to Z=8, one solid with the arm. Position: the crank points at 20° (measured from the line of centres, which points at 0°), so the pin centre is at (8.191, 25.261). The wheel is turned so that one slot's centre line passes through the pin centre: that slot points at 162.122° from the wheel axis (the pin centre is 33.423 from the wheel axis), and the other slots are at 162.122° + k·60°. The pin sits in the slot with 0.1 clearance each side.
Model facts
- Overall size
- 124 × 104 × 38 mm
- Bodies
- 2
- Volume
- 70.6 cm³
- Adjustable in the studio
- 2 dimensions
