HELP!!! profiling cores

doughboyshredder · Post by **doughboyshredder** » Sun Sep 19, 2010 12:50 pm

It's heeeere. Wow, this thing is a beast. Gonna go grab lunch and come back and get it set up.

Pretty excited.
Can't believe how much time I wasted trying to avoid buying a planer.

twizzstyle · Post by **twizzstyle** » Mon Sep 20, 2010 11:22 am

MontuckyMadman wrote:Twizz how did you Arrive at your "curvy profile" dims? Trial and error? Feel like sharing the profile design/drawing?

Yeah I can give up some DXF's or something. For my last skis (the piggy sticks, fat soft powder skis) I measured my Line Motherships core thickness along the entire length (something like every inch?). I plotted that up in solidworks as a rough guide, then drew a bezier curve to match it. Now I can use that file as a "template" and adjust as necessary for different lengths/thicknesses, etc. For my next skis I want them a bit stiffer, so I'm not actually going to make them thicker in the middle, just extend the thickness at the middle out more (by stretching that part of the bezier out... if that makes sense). There's certainly no real science behind my profile, its just a rough match of an existing production ski...

twizzstyle · Post by **twizzstyle** » Mon Sep 20, 2010 11:23 am

doughboyshredder wrote:It's heeeere. Wow, this thing is a beast. Gonna go grab lunch and come back and get it set up.

Pretty excited.
Can't believe how much time I wasted trying to avoid buying a planer.

NICE! You'll love this thing. They can make a mess, so have your shop vac handy!

doughboyshredder · Post by **doughboyshredder** » Tue Sep 21, 2010 4:13 pm

holy mess, batman!

I thought I had a decent diy dust collector setup, but it got clogged after two passes and then jammed up the infeed and outfeed rollers. Luckily I was running a test piece of plywood through, with my planer crib and didn't ruin a core in the process.

Guess I need to get a real dust collection system. Fack, I really don't want to spend anymore money on this. I am going to try with no vacuum on it at all, and see what happens.

Hot glue wasn't working for me on holding the test piece down. It still got sideways and wanted to move. I guess I'm going to use the hot glue, but also sink a few screws down where I am not taking off any material (I have different thickness core stock so I am not planing the entire core, just the tapered ends.

I'll post some pics tonight.

doughboyshredder · Post by **doughboyshredder** » Tue Sep 21, 2010 5:48 pm

I could almost cry.

Decided to give her a go and profile the core that I had already shaped and glued sidewalls on.

The sidewalls were quickly ripped off of the core. Nicely, they took a couple good chunks of wood with them also. Can you say "ruined"? Fack me. Not sure what the exact problem is, but I suspect that I was simply removing too much material, and when the blades hit the plastic, kaboom. Or, maybe the blades are a little dull, but from the cut on the wood I don't think that's the issue. Luckily I have more core stock, but this is getting ridiculous. Are lighter passes the answer? Or, maybe attach the sidewalls after profiling and then hand sand them? Does this core look savable? Maybe cut a square section out where this damage was done? Doesn't seem like a good idea, since it's right where the bindings would be. Build a skateboard out of it? Scream and curse the gods?

So much work destroyed.

COsurfer · Post by **COsurfer** » Tue Sep 21, 2010 6:07 pm

Hey Doughboy, Are you sanding and heat treating your PTex before gluing to the core? I first plane my cores to 10mm then attach the Ptex. I then run my cores through with very very light passes. I check the PTex everytime I run it through and if they start to delam I glue and wait. Unfortunately sometimes I still get that horrible sound of flapping ptex that drives you crazy, good times! Looks like you have a wide enough planer that you may be able to screw some supports along each side. I do that when I CNC my cores.

leboeuf · Post by **leboeuf** » Tue Sep 21, 2010 6:13 pm

Ouch! Are the knives sharp? Adjusted?
I have a shoddy new age shop style delta thickness planer and never try to take more than 1/16 off when dealing with hardwoods.

That core looks like it took a beating...

It almost looks like the core popped up under the cutterhead and started to smash back and forth between the table and knives?

MontuckyMadman · Post by **MontuckyMadman** » Tue Sep 21, 2010 6:13 pm

wow. running plywood through your planer will dull the blades mucho quick. Same with MDF. You got glue and multi axis wood in the ply.

Perhaps you are removing to much wood or attempting to move the stock through the planer too quickly and the material is being ripped rather than cut. Can you slow own the intake on that thing?

This is a constant problem with plastic sidewalls an profiling.
I don't even want to try it after all the problems we see on this board.
Dan graf seems to have no problem with this.

I don't know what else to say other than wow what a bummer.

Do you use PU glue to attache the sidewalls?

doughboyshredder · Post by **doughboyshredder** » Tue Sep 21, 2010 6:13 pm

not heat treating the sidewalls till after profiling. The bond seems pretty damn strong, I mean it ripped the wood out. There is wood along the whole edge of sidewall. It sounds like very light passes is the way to go. I was removing way more material than I should have been, I think. I like the idea of attaching side supports to the crib. Maybe next time I won't even cut away that portion of the core and just rout a trench for the sidewall to glue in to.
thanks!

MontuckyMadman · Post by **MontuckyMadman** » Tue Sep 21, 2010 6:13 pm

delete

COsurfer · Post by **COsurfer** » Tue Sep 21, 2010 6:18 pm

I use 1" strips of MDF and press them tight along the ptex and screw them down. It keeps the Ptex from flapping around. I wish I could do it with my planer but I only have a 13".

doughboyshredder · Post by **doughboyshredder** » Tue Sep 21, 2010 6:30 pm

MontuckyMadman wrote:wow. running plywood through your planer will dull the blades mucho quick. Same with MDF. You got glue and multi axis wood in the ply.

Perhaps you are removing to much wood or attempting to move the stock through the planer too quickly and the material is being ripped rather than cut. Can you slow own the intake on that thing?

This is a constant problem with plastic sidewalls an profiling.
I don't even want to try it after all the problems we see on this board.
Dan graf seems to have no problem with this.

I don't know what else to say other than wow what a bummer.

Do you use PU glue to attache the sidewalls?

So, I shouldn't have ran that plywood through as a test then.
I think I was just taking too much material. Probably 1/6 of an inch.

Yeah I can slow down the feed rate, I think I had it on the fast feed rate.

doughboyshredder · Post by **doughboyshredder** » Tue Sep 21, 2010 6:33 pm

leboeuf wrote:Ouch! Are the knives sharp? Adjusted?
I have a shoddy new age shop style delta thickness planer and never try to take more than 1/16 off when dealing with hardwoods.

That core looks like it took a beating...

It almost looks like the core popped up under the cutterhead and started to smash back and forth between the table and knives?

Yeah, I was taking way more than 1/16. The sidewall just got ripped off with the wood. The main body of the core stayed down tight thanks to the rollers.

MontuckyMadman · Post by **MontuckyMadman** » Tue Sep 21, 2010 6:42 pm

I do it by mm, no more than 1.5mm at a time. thats like 1/16 I think. yeah wayyyy to aggressive.

doughboyshredder · Post by **doughboyshredder** » Tue Sep 21, 2010 7:36 pm

I just measured and I was taking 3mm off on the first pass.

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HELP!!! profiling cores