I'm not much good at fluid dynamics, but I'm sure there are a lot of folks here who have enough practical experience to know the answers to these questions.
I've been thinking and reading about vacuum chucking and understand that the degree of holding is directly related to the area of the mouth of the vacuum chuck. With that in mind, there must be a practical limit to how small the chuck diameter can be, and still have enough gripping power to be useful for turning at typical levels of vacuum. Anyone know what that limit is?
Another thing that I wonder about is, with a dust collection device such as a shop vac or large dust collector, the suction power seems to drop off as the collection bin fills up. I have cyclonic separators on both my shop vac and dust collector, and have noticed an increase in suction after emptying the bins on both, without having done anything to the filters. What is it that causes the apparent change in suction with a change in available volume in the bins?
I've been thinking and reading about vacuum chucking and understand that the degree of holding is directly related to the area of the mouth of the vacuum chuck. With that in mind, there must be a practical limit to how small the chuck diameter can be, and still have enough gripping power to be useful for turning at typical levels of vacuum. Anyone know what that limit is?
Another thing that I wonder about is, with a dust collection device such as a shop vac or large dust collector, the suction power seems to drop off as the collection bin fills up. I have cyclonic separators on both my shop vac and dust collector, and have noticed an increase in suction after emptying the bins on both, without having done anything to the filters. What is it that causes the apparent change in suction with a change in available volume in the bins?