Instructables

The Official Guide to Knex Ball Machine Lifts

Step 25: Counter Parallel Arm Lift

Picture of Counter Parallel Arm Lift
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This lift was built by sandroknexmaster, and was first featured in his ball machine Euphoria.The arms are similar to a regular parallel arm lift, but there are two sides of arms instead of one. A crank at the top alternates both sides (when one is up, the other is down).  Here are the instructions, and the video is below.

 
 
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