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#1
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Re: Balancing an arm that starts down?
We use gas springs from McMaster.com to counterballance our arm (like the ones you find holding up a car hood or liftgate). They're light and not too pricy at ~$15. The most common are compression, so it makes them pretty easy to mount too.
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#2
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Re: Balancing an arm that starts down?
We found that a small bungee kept our arm pretty balanced. We had to make some modifications to make sure that it was not too tight. If you've ever been hit by a bungee, you can understand.
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