Low Cost DIY Rod Weighing Setup

pishta said

if we could get very fast reporting via networked load cells, it could be set up in such a way that the entire crank V-block fixture could be on these load cells and reporting to a microprocessor in tandem with a magnetic pickup degree wheel to report when these events occur in degrees during a spin up, you could build a radial balance fixture. Back to the balance fixture.....Mark, did your ends weights add up? I feel were getting very close to a cheap balance fixture design.

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Yes, you can see it in the 3 pix in post #4; the rod total was 1 gram different from the sum of the 2 separate end weights; that 1 gram difference is beyond the ability of this scale to resolve. I have been doing all 3 weights on each rod and checking the sum of big and small ends vs the trod total as a check on measurement confidence.

If I get to + or - 4 grams difference between the rod weight vs the sum of the big and small end weights, then I re-weigh. This is what IMHO is a weakness in just weighing the big end and the rod, and then subtracting to compute the small end; the big end weight can be way off and you would never know it if you don't do the complete set of 3 weights on each rod. (Or, you spend some big $$$ on professional setup like the CWT system.)