Originally Posted by at_nyc
Another dumb question from someone who just ski and don't have much of a clue on equipments.How does one tell, or figure out when the ski needs more than just a quickie wax & edge job? Like, when does the ski needs a base grind?
I'm not talking about ski that had gone over rocks or missing chunks of ptex. Just skis that has been used on piste for a while and had been through some edge/wax cycles.
Does one just go by how many sharpening of the edge calls for a base grind? Or there are other measures to help decide?
Today I was on my daily drivers, doing repeat runs on a steepish icy groomer. By ice, I mean New England ice.
It rained the other day, then froze. It's been cold since the rain. Groomers have passed over this frozen surface several times,
shaving the ice into little flakes and granules. The tiny bits of white stuff on top of the transparent gray stuff brush away easily.
They are not very deep. So on every turn, unless you're at the very edge of the trail turning right next to the trees, you're on ice.
I was attempting to carve. Well, I now know I need a base grind. How do I know?
Because as I was carving, the outside ski do its thing properly, then it would slip down the hill a bit, then it would re-grip
and continue along its line. Both outside skis did this. I switched the skis. Same deal.
As my weight was moving fore-aft on the skis, it would pass by a spot on the edge of the outside ski where the base bevel
was ... um .... corrupted, and the ski would slip. As my weight moved past that spot, the ski would re-grip and continue along its line.
I have recently been shown how to remove burrs on the base of the edges. Evidently I was shown wrong, or I misunderstood
something, or misremembered. Whatever. I did it.
So to reset the base bevel, I need to get the base ground too. It's the edge that is necessitating the base grind.
So another answer to the thread question is that a base grind is needed when the base bevel on the metal edge has gone bad.