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Re: (ET) Leaf vacuum attachment



Oh ok, that's static balancing, I was thinking more along the line of dynamic (while it's spinning) balancing. The impeller is back on the shaft, so I'll just fire it up next weekend and see what happens.

Meantime I did drag the E15 out of the weeds and will see about getting it working again as well. What killed it most recently was that the charger ran away and melted the 30 NiCDs because I tried using a different capacitor and the timer fused. Bad idea :-)



On 8/11/2019 7:04 PM, weinreich frontiernet net wrote:
Just a couple of thoughts on balancing things like blades and turbines. I haven't tried this on an EZ Rake turbine yet, however I would think that a lawn mower balancer, (the small cone on the pivot base type) would balance a turbine assembly just as well as it does a lawn mower blade.  Same rules apply:  insure that there is not ANY debris and or rust on the object to be balanced.  (I would probably soda blast it to get into the nooks and crannies).  The one issue might be the location of the keyway in the turbine hub.  For this I would cut a length of key stock and grind/file/machine one end so that it is the same depth as the keyway, (as if there were no keyway in the hub while you are trying to balance it).  The really tricky part is likely to be whether to add or remove weight from a particular blade to obtain a level plane. Detecting the need to remove weight would consist of spot drilling holes of the appropriate size on the outside edge of an impeller blade in order to remove a bit weight while not drilling completely through it. Conversely to add weight you might put a spot or two of weld on a blade.  This may be better than the removal technique in that if it is too much you can always grind some off.  And then you may find that the thing is very well balanced just as it is!

Chris Weinreich