A couple things that I noticed using digital angle finders/inclinometers is they are very sensitive and if you do not align with the axis, you can get misreadings. Same for base and real edge variations at different locations on the ski. Multiple resets need to be made at various locations.
The main thing, we definitely over obsess on this matter in regard to the number value. I suspect a lot of bevel guides and edge angles are less than absolutely perfect for a variety of reasons that at the end of the day our ski days aren't ruined. An additive half to one degree variation in a base, tool, tuner and other variables is probably the reality as well as real variations along the edge.
I even found a 1/2 degree inaccuracy in my Bevel Meter using the digital angle gauge. This will require a recalibration with a machinist's 1:2:3 block.
Regardless, the best way I think I can feel confidence in getting close to true readings is to span from edge/base intersections with the assistance of magnets that snap to the metal edge and/or true bar. Even then there can be a slight inaccuracy if the gauge is not dead center on the gauge. Supergluing a linear magnet seems best so far.
A magnet under the mid section of a true bar also assists with the feeler gauge method for base bevel measuring.
Here are some random shots from last year, so I do not recall the exact reason for the shots and angle readings, but the off center readings can very well be inaccurate, but at least you can get the idea. It's pretty fun, but if you get wrapped up in absolute perfection, you'll never sleep again.
This probably why Atomicman is adamant about using an edge to edge base bevel guide.
FWIW, the real bevel angles on these skis are one pair of edges @ 1°:2° & the other pair @ 0.5°:3° (+/- 0.25° or so)......and I have lots of fun on them, despite the 'inaccuracies'.
(EDIT: FTR I attribute the inaccuracies to putting these skis though the ringer for our tuning tips. They've been used to demo hand tools, including base flattener/structuring, body files, repairs, hand structuring, different bevels, you name it. The base bevels were reset after a recent grind to 'as flat as possible' by a reliable tech.)
PS, just for grins Zero Gravity. one of my favorite contrarian quips:
"........... a hotel room key when placed between a file and ski base it produces a 1 degree base bevel angle (I'm not kidding, one of the Canadian team techs actually uses room keys when on the road)."
Edited by Alpinord - 2/10/2009 at 02:36 pm
Edited by Alpinord - 2/10/2009 at 04:12 am