Search found 2187 matches

by twizzstyle
Tue Jun 14, 2016 9:29 pm
Forum: Journals: Log Your Ski Building Progress
Topic: Kampai Custom
Replies: 117
Views: 55915

Years ago I put a lot of thought into a CNC edge bender. I had what I thought looked like a fairly decent design all drawn up in Solidworks. My biggest hesitation was doing an open-loop stepper control (like my CNC router and mill), because if the edge slipped at all in the rollers I would have used...
by twizzstyle
Mon Jun 13, 2016 9:15 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Could you make a pneumatic bladder from scratch?
Replies: 17
Views: 9072

Meh, sounds like more work than it's worth when left over old fire hoses work great. If you're looking for a side project, sure, but I don't think you will gain any benefits.
by twizzstyle
Sat Jun 11, 2016 9:09 am
Forum: Journals: Log Your Ski Building Progress
Topic: Volition Skis - 2016 and beyond
Replies: 27
Views: 14431

How did the epoxy deal with the fire? Sorry to hijack your thread Chris 8) It got burnt pretty bad under where the fire was (garbage bin), but otherwise just got sooty. It was all stripped to bare concrete during the rebuild though and I did a brand new coating (exact same stuff, 2 part epoxy from ...
by twizzstyle
Sat Jun 11, 2016 9:05 am
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Planer jig that last
Replies: 9
Views: 5481

Does it matter if they bow? As long as the thickness is staying the same, you'll get the same core profile (assuming its now bowed so much the planer can't push it flat)
by twizzstyle
Wed Jun 08, 2016 9:38 pm
Forum: Journals: Log Your Ski Building Progress
Topic: Volition Skis - 2016 and beyond
Replies: 27
Views: 14431

sammer wrote: Gotta get my floor coated in the shop before I move all the crap in there.
Epoxy? Best thing I ever did in my shop.
by twizzstyle
Sun May 29, 2016 7:52 am
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Drag Knife Software
Replies: 11
Views: 6776

Also, if you have this ability in your CAM software, doing some kind of ramping lead-in will help, versus dropping straight down and running. That way you are slowly engaging the tip of the blade which helps it align itself, with minimal damage to your material.
by twizzstyle
Sun May 29, 2016 7:51 am
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Drag Knife Software
Replies: 11
Views: 6776

Gotcha. Does any drag knife software do that? Every drag knife I've seen is just passive. When I cut bases, it's only a couple of cuts so I just reach under the router and spin it roughly in the directly the cut will be. If it's 90 deg off, it will correct itself no problem (I use homemade drag knif...
by twizzstyle
Thu May 26, 2016 8:12 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Drag Knife Software
Replies: 11
Views: 6776

I have a vinyl plotter, and I've often wondered if I could figure out a way to export usable gcode from it that I could use on my CNC router. I've never really looked into it though. I just don't do sharp corners.
by twizzstyle
Fri May 13, 2016 12:02 pm
Forum: Ski/Snowboard Design and Layup
Topic: Stiffness Calculation
Replies: 18
Views: 11092

Here's my take (full disclosure, I am an engineer, although I test airplanes, not structure) The math is fairly straight forward for simple composite beam bending. You don't need FEA for something like this. Throw the maths into a spreadsheet and build some tables, make some easy plots, etc based on...
by twizzstyle
Fri Apr 22, 2016 7:03 pm
Forum: Materials and Supplies
Topic: How bad is Biax?
Replies: 14
Views: 6356

Just remember that any fibers running 90 (laterally on the ski) are doing nothing for you but add weight.
by twizzstyle
Tue Apr 05, 2016 5:38 pm
Forum: Aprés Ski Building
Topic: Joining the forum
Replies: 1
Views: 2579

The Admin of the forum (Kam) is a busy man. We need to have the email confirmation, otherwise we get hit with spambots and it ruins the forum. You just need to be patient with Kam.
by twizzstyle
Sun Jan 24, 2016 8:55 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Grindrite st600
Replies: 3
Views: 3097

I can't remember how much total it cost me to build the autofeed. It wasn't crazy, but it was certainly more than $60. The motor was a little underpowered (I used a motor from a harbor freight gantry crane trolley), but it got the job done. For brand new skis I use 80 grit to remove epoxy and flatte...
by twizzstyle
Sat Jan 23, 2016 9:28 pm
Forum: Equipment and Tools (e.g., ski press, core profiler, etc)
Topic: Grindrite st600
Replies: 3
Views: 3097

The old Toko grinder I used to have (lost in a fire last summer) had an adjustable fence for doing edges (so you use the main belt, rather than a separate edge only grinding attachment). I bought an ST600 as a replacement after the fire. I've never seen any pictures of ST600s with a fence like my ol...
by twizzstyle
Sat Jan 23, 2016 9:12 pm
Forum: Journals: Log Your Ski Building Progress
Topic: First Ski Build - Success!!!
Replies: 20
Views: 13902

Looks like he's taping his bag to the mold surface, so there really isn't any load pushing the polycarbonate down between the ribs. The atmosphere is pushing on the bottom just as much as it's pushing on the top. I'd still want more ribs though, just the weight of the materials may be enough to make...
by twizzstyle
Sun Jan 17, 2016 7:36 pm
Forum: Journals: Log Your Ski Building Progress
Topic: Giddy up! First build.
Replies: 14
Views: 8056

The IMG tag needs a direct image link, should end in .jpg or other image format. The google drive links won't work with the IMG tag.