Simple profile jig

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sammer
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Simple profile jig

Post by sammer »

heres my simple solution. keep in mind these were very short skis 127cm
but with a few increasingly thinner shims would work for use with a router bridge on longer boards.
Image
Image

sam
You don't even have a legit signature, nothing to reveal who you are and what you do...

Best of luck to you. (uneva)
G-man
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Location: northern sierra nevada

Post by G-man »

Very clever. Now, put a vacuum box under that set-up, and you've got it made.

I have my router attached to the bridge and the bridge has nice comfortable handles on each end (so I hold onto the bridge rather than the router... easier due to the lower center of gravity). I make my cuts in the longitudinal direction rather than the lateral direction and the bridge itself slides laterally across the rails to get in position for the next longitudinal cut. The bridge has about 6 inches of lateral movement.

G-man
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bigKam
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Post by bigKam »

brilliant!
nkimmes_40
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Post by nkimmes_40 »

what are your rails made out of?
sammer
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Post by sammer »

I just used 2 pieces of 3/4x2 1/2 primed MDF molding 8 ft long. cheap and simple.
Clamped the ends to the end of my bench,
then clamped them down with 2x4 at the running length.

+Kam, thanks, means a lot coming from you.
sam
You don't even have a legit signature, nothing to reveal who you are and what you do...

Best of luck to you. (uneva)
nkimmes_40
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Post by nkimmes_40 »

ok thanks
this looks alot easier than the other way. i might try this for my first core. if you have any more tips that would be awesome. thanks
sammer
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Post by sammer »

nk... just be aware that it is pretty flexy.
I will probably put 4 or more thinner shims under each side when i make my own cores.
These are for my 7yr old daughter so very short.
I'm also thinking of using this same idea for my base mold
2'x8' 1/2" MDF with arborite glued to the top and then bend my camber.
should work ok for top bag vacuum system. I will post pics once i get time to put it all together.
I need it all to be fully adjustable as all 3 kids will need new skis in the next year or so.
Its true, they do grow like weeds.
sam
You don't even have a legit signature, nothing to reveal who you are and what you do...

Best of luck to you. (uneva)
nkimmes_40
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Post by nkimmes_40 »

yea it looked like it would be kinda flexy but it should work with more shims. When you make your own core eventually post pics and hopefully it works out good.
sammer
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Post by sammer »

After using this setup for 7 pairs of cores I've finally got it dialed in.
When I originally posted this I thought I'd need to shim the heck out of it to remove the flex.
It turns out that it is a pretty precise tool.
The shim in the middle determines the height and position of the thickest point then depending on the profile your after you shim accordingly.
I clamp them down at the end of the running length then hot glue to hold it when I remove the clamps

Image

Image

These 2 pieces of trim have lasted through 7 pairs of cores and will probably do at least 7 more.
I'm using a 1 3/8" straight bit and doing long (tip to tail and back) cuts.
Going side to side left steps and was slowly eating the rails.

Image

So far so good!
Once I'm done with the router they need a quick sanding with 80 grit to roughen them up and they are ready to go.

Image

As G-man said at the time I need to "put a vacuum box under it" and it would be gold. 8)

sam
You don't even have a legit signature, nothing to reveal who you are and what you do...

Best of luck to you. (uneva)
Greg
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Location: Sweden but home is NW Washington

Post by Greg »

Since you posted that method, I too have been using it and it works wonderfully. The only difference for mine was that instead of glue, I use sheetrock screws. I also got an old table top with a smooth laminate surface. I routed a 2 mm deep groove on each side to use for aligning the profile curve pieces, which works fantastically.

Thanks for the tip!
Want skis Better, Cheaper, Faster and much much Cooler... build your own.
alexisg1
Posts: 110
Joined: Fri Dec 08, 2006 12:38 am
Location: Grenoble, FRA

Post by alexisg1 »

best design award !!!!

I'm going for it too !
thanks a lot :D

edit : My french dictionary doesn't know "to shim the heck" :(

Greg: if you can show your enhancement, that'd be nice too ;)
Sailor Pronk
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Joined: Sat Mar 23, 2019 5:02 am

Re: Simple profile jig

Post by Sailor Pronk »

Wow, so happy I came across this thread! This looks like such a quick and easy solution to a problem I’ve been having cutting down my cores.
Thank you
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