Low Cost DIY Rod Weighing Setup
just noticed a flaw on my part. See the cork riser for the big end? Its not on centerline...wonder if that is an issue? Ill put them on center tomorrow. Neither ends add up to 752.....:(
Yes, everything needs to be symmetrical from one end of the plate to the other. In that way, any weights associated with the plate will divide exactly evenly between the 2 ends. And, yes, I put my spacers for the big end right on the 2 lines, and made them symmetrical around one end line or the other; in that way, nothing on the plate will create any leverage on the other end.
The BB seems to work really well! The single point contact on the scale seems to be the key to make the cheapo scale behave reasonably well.
OK, on the concrete floor; that is a good change. I suspect you removed a variable that was allowing the scale itself to move a minute amount. Next time you look at this, try tapping the concrete floor beside the scale with a block of wood or a dead blow hammer and see if the readings 'settle in' to a consistent number. The minute vibrations seem to relieve any residual side or tilt loads that effect the scale.
As for the end weights not adding up.... the big end weight you got looks totally consistent with what I am getting for the stock heavy rods. The small end weight looks quite a bit off; I ma seeing 240 +/- grams consistently. It is almost like the jig weight was not completely calibrated out for the small end measurements....?? That is where tapping on the floor to 'settle' things may make the zero-ing out of the jig weight better.
These cheapo scales sure take a lot of 'finageling' to work with for this...
