Quote:
Originally Posted by mman1506
That's not hard. The weight of the shaft alone will probably be enough to overcome the friction of the cylinder. Anyway Ari423's reasoning for not powering the downstroke was not due to friction but due to the solenoids switching restrictions (what I'm questioning).
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Well the reason I gave was solenoid switching restrictions, but it was actually more than that. We did devise a method of dealing with the solenoid. When we tried using in without any down pressure, it worked but it was painfully slow when only lifting one tote. Gravity just wasn't strong enough to overcome the friction (granted we also had a pulley system to make sure both sides were the same height that could have added some friction). We settled on about 15 psi of down force, which was below the rated min pressure but it worked out ok. Perhaps with a strategy where you lift 2 totes minimum you can get away with a lower pressure or even no pressure.