Marble Roller Coaster

UPDATE:

I've doubled the diameter of the Archimedes screw shaft to make it more durable. I've also added a hex boss for the spur gear to attach.

The updated files are:
marble-coaster-lift-v2
marble-coaster-screw-v2
marble-coaster-lift-top-v2
marble-coaster-spur-gear-v2

Lego compatible marble roller coaster with Archimedes screw lift.

Should work with 14.5 to 16.5mm diameter marbles or bearings.

These have a very tight fit with real lego pieces with my printer (your mileage may very).

Uses this Lego TT motor.

Parts required for lift (see post printing notes):
marble-coaster-lift-v2 - 1
marble-coaster-screw-v2 - 1
marble-coaster-lift-top-v2 - 1
marble-coaster-pinion-gear - 1
marble-coaster-spur-gear-v2 - 1
marble-coaster-lift-ramp - 1

Parts required for short track:
assembled lift - 1
marble-coaster-straight - 7
marble-coaster-short-straight - 1
marble-coaster-ramp - 6
marble-coaster-180 - 3
marble-coaster-180-banked - 1
marble-coaster-90 - 3
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