The tachometer arrived together with the springs for the clamps and the reflective tape.
I have to make some minor changes to the clamp jaws to give the springs some more room to be compressed (just a matter of drilling the holes to a larger diameter); the cradle for the tachometer was spot on.
The little reflective flag thingy works perfectly and if you aim the laser a the bottom edge it reads even the smallest of shaft vibrations . It does give pretty constant and repetitive readings. I Measured the same uncut shaft (Apollo phantom R/S) along the spine and NBP axis giving a 2 CPM difference, but both resulting in a A+ flex, wich corresponds spot on with the DSFI index indicating that shaft is almost one flex softer as stated by the manufacturer.
Still waiting for the toggle clamps to finish the design. They have cleared French customs today, so I hope to receive them on monday.
_edit: it also measures fine without the reflective flag but if the amplitude is to big it triggers twice per cycle and gives the double CPM, after a short while there's only one trigger and the reading on the display stabilises. The flag adds about half a swingweight and results to 1 CPM less compared to without the flag. The shafts I had laying around all measure to what is expected!
