Line Skis Press + factory

a.badner · Post by **a.badner** » Mon Apr 11, 2011 1:34 pm

any one who is a die hard skier probably has seen this already, but still

LOOK AT THAT AWESOME PRESS!

and does anybody understand how the edge bending thing they have goin there works?

jvangelder · Post by **jvangelder** » Mon Apr 11, 2011 2:27 pm

their edge bender looks like a common industrial wire bending machine. Full screen the movie and pause it just before it looks like the wire loops in his hands and you will see the center roller moves in bending the wire in an arc

Im not 100% sure, but i think they are making there edges from a spool of coil wire into actual edges in that first yellow machine aswell, which is badass in its self

-Jacob

Richuk · Post by **Richuk** » Tue Apr 12, 2011 3:36 am

It's a computer controlled version of what twizz designedb - he kindly posted a ski-matic if you are looking into this.

twizzstyle · Post by **twizzstyle** » Tue Apr 12, 2011 6:24 am

Ha, ski-matic, love it.

Seeing as K2 owns Line now, I would assume this is the K2 factory in Seattle (I worked at K2 for a summer when they were still on Vashon, now I work just down the street from their huge place)

This was the opening for a ski movie last year or the year before wasn't it? Great video.

(I've seriously considered converting my edge bender to CNC, just for kicks... I've got a few spare stepper motors lying around, and already use my CNC mill all the time so I've got the basic know-how... would be a good weekend project)

twizzstyle · Post by **twizzstyle** » Tue Apr 12, 2011 6:26 am

What I've wanted to know is the glue they use to glue the edges down. Seems like 100% of people here use CA to glue their edges down (myself included), but they are putting a constant bead of something down. It almost looks like contact cement (kinda looks like wood glue too, although that would make no sense)

Richuk · Post by **Richuk** » Tue Apr 12, 2011 11:09 am

STIX-IT Acetone Craft Glue 250ml is a maybe - the image is google (image) is very similar. Tri-banded label. Think it might be produced in China.

twizzstyle · Post by **twizzstyle** » Tue Apr 12, 2011 11:28 am

Have a link Rich? I can't find anything similar on Google

Richuk · Post by **Richuk** » Tue Apr 12, 2011 12:54 pm

These are the links that make me think it might be the brand. Maybe Falls has heard of the range?

http://www.cheaponsale.com/d-p111908272 ... lue_250ml/

http://www.craftsmart.com.au/data/craft ... alogue.pdf

Liquid glass looks good ...

http://www.tjskl.org.cn/sale-glue_stix/

falls · Post by **falls** » Tue Apr 12, 2011 4:44 pm

pretty sure the edges are on a spool and the yellow machine is a sandblaster that gets them ready for bonding just prior to layup. you can see some wispy dust in the air at one point in the video.
I assume this is the video from poor boyz revolver. I didn't watch it but what you're all talking about sounds like it. Iggy said that it was shot at K2/Line when I posted it a while back.
I don't know about the glue, sorry.
I have worked out the equation that relates edge radius to how much the wheels on twizz's edge bender need to move in order to convert to CNC, but that's as far as I got. Mine is the same but the positioning of the wheels means I get a fair bit of springback so I would need to work out a "fudge-factor" to overbend so it springs back to what I want. I have no idea really how to do that other than trial and error and I'm already doing that when I bend using the machine by hand. I would really like to build a CNC bender if I was taking this seriously in the future. A long spool of edges and a CNC bender would make it a lot easier. That and designing skis that are purely made up of radii or circles rather than using splines!

twizzstyle · Post by **twizzstyle** » Tue Apr 12, 2011 9:06 pm

falls wrote:the positioning of the wheels means I get a fair bit of springback so I would need to work out a "fudge-factor" to overbend so it springs back to what I want. I have no idea really how to do that other than trial and error

That's exactly what I was planning - I get tons of springback too because I don't heat my edges before bending. It would be hard for me to sacrifice one edge section and take a few data points of bender position vs resulting bend radius, and create a curve from that. Piece of cake.

I think the hardest part is the feed, I wouldn't trust the rollers alone to pull the edge through, if it slipped at all the whole edge would be garbage. I need to figure out some clever feed mechanism that is fed by another stepper motor also being controlled via CNC.

falls · Post by **falls** » Tue Apr 12, 2011 11:54 pm

If you look at that video closely you can see that there is another wheel feeding the edge in before it gets to the bending area.
Maybe some rubber in the groove to grip it better?
I thought you could run a pulley and belt system to make the feed wheels run at the same rate. This would mechanically make it run evenly. I don't know if running the same electric output to two identical stepper motors would achieve the same thing. Probably it would, as I guess that is how most CNC routers run their long axis.

The major thing that has stopped me is that I think you would be best to machine the mount for it all and run it on linear bearings in and out to stop any play in the system. I have a rough design, but I think milling a block might be expensive for me. Perhaps with your CNC mill and know how you're the man to make this thing.

carnold · Post by **carnold** » Wed Apr 13, 2011 12:58 am

Hi. All you need to do is use a measurement sensor at the out put of the pinch rollers and then feed that back to controllers for the steppers.
Should be easy! Can I order one?

twizzstyle · Post by **twizzstyle** » Wed Apr 13, 2011 6:06 am

carnold wrote:Hi. All you need to do is use a measurement sensor at the out put of the pinch rollers and then feed that back to controllers for the steppers.
Should be easy! Can I order one?

Ha closed loop control eh... that's just slightly outside my current capabilities, but if it came to that I'm sure I could figure it out.

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Line Skis Press + factory

Line Skis Press + factory