Today I found myself with a bit of a challenge, decided to document it as best as possible, and share it with the gang here on epicski. I will omit a few details, partly to keep this post short, and also to protect some proprietary knowledge. What I have is a pair of '14 Head GS 195 r35m RS skis that are severely base-high. My definition of base-high is that - with the ski on a bench base side up, the base is higher than the edges. These skis were used this summer/fall in pre-season training camps on glaciers. The nature of this base/edge profile is due to excessive base edge filing, and/or abrasion. You can also note that there is no structure left on the ski, as it originally had a cross-linear pattern. The challenge lies in that I need to grind this ski flat, setting the base edge bevel to 0 degrees, reset the base edge to .5 degrees, and imprint a structure - without grinding through the ski.
I am using a Montana Snow Cruiser (robotic tuner) to process these skis. Montana and Wintersteiger have slightly different variations with regards to how they process equipment. Some people say that the operation of robotic ski tuning equipment doesn't require very much skill. That could be partly true, but to do what I am doing here requires an operator that knows how to identify the processes being done, which programs to use (in order) and, when/how long to use the appropriate amount of processing, in 3 or more programs.
That said, the first thing I did was grind the ski on a "pre-grind" or "rough-grind" structure. The goal is to return the base to flatness, and the base edge to 0 degrees. You will notice that these skis have factory installed base burn ptex strips along the edges in the waist area of the ski.
Pre-grind base flattened, and base edge set to 0 degrees.
Top-view of pre-grind structure
Next is to erase the pre-grind strucure from the ski, and the stone with what is sometimes called a "mirror grind"
And finally time to imprint a cross-linear pattern, as well resetting edges to .5 base and 3 side.
Top view of final structure.
So in a nutshell thats it! I hope you guys enjoyed this post, and as always, feel free to post any comments or criticisms.
Pray for Snow!
Edited by Chenzo - 10/16/13 at 7:18pm