Drag to spin · pinch to zoom · tap a part
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Robot builders · Attachment workshop
Five attachments for the Arena, part by part. Drag to spin, pinch to zoom, tap any part. Turn the motor to see the gears work, and pull it apart to see the build order.
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Measured from the model through its whole motion, with the driving base.
Original practice models with building-system proportions (8 mm holes, module-1 gears). Sizes are estimates: measure your real robot before a match.