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CNC Chevalet #2: Robots do my bidding

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Blog entry by zombolina posted 03-09-2013 07:06 AM 1005 reads 0 times favorited 6 comments Add to Favorites Watch
« Part 1: Don't look, Patrick and Patrice! A CNC made Chevalet Part 2 of CNC Chevalet series Part 3: Got my work cut out for me...GET IT? »

After quite a bit of time breaking down and tweaking the 3D model and then jumping throught some hoops to output correctly formatted vectors of (hopefully) all of the parts, I was finally able to take everything into Vectrics Aspire in order to generate the tool paths.

Did a pen test first, and then changed the layout, so hopefully the lines will sand off. Here’s the 3/4” sheet:

(anyone know how to upoad photos right side up?!)

Today had me wishing for a vacuum hold down system or some plastic screws. We did not get to finish the 1/2” sheet of parts due to (not one, but TWO) broken endmills! >:-(. I put a hold down screw a tiny bit too close to the path and totally missed the other one that was right in the way:

Tomorrow will finish up the 1/2” sheet and start putting this puzzle together. After buying some new bits, of course.

-- Success is the ability to go from one failure to another with no loss of enthusiasm. -Winston Churchill



6 comments so far

View Jim Rowe's profile

Jim Rowe

561 posts in 979 days


#1 posted 03-09-2013 02:27 PM

This is looking good. Will you be using hide glue for the construction parts?
Jim

-- It always looks better when it's finished!

View shipwright's profile

shipwright

5009 posts in 1464 days


#2 posted 03-09-2013 03:01 PM

There is more and more irony happening here Sally. CNC cutting of the parts is a far cry from the hand cutting you will be doing with the chevalet but running your endmill into a screw has exactly the same effect as running your chevalet blade into one of those tiny nails that Mat and I were playing with last month. Maybe these experiences will help guide your hand when you start installing veneer nails, to keep them clear of the lines but not so far away as to waste material. :-)

Interesting build to say the least.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fiberglass trees. http://prmdesigns.com/

View sandhill's profile (online now)

sandhill

2125 posts in 2590 days


#3 posted 03-09-2013 03:24 PM

Not sure if I can put my finger on it but something seems to be missing in your first drawing in Part#1 Look like its coming along good.

-- Bob Egbert AKA Sandhill http://www.sandhillwoodworks.com/

View Mathew Nedeljko's profile

Mathew Nedeljko

607 posts in 2496 days


#4 posted 03-10-2013 12:51 AM

Hey Sally, this is looking good! I’m sure there is a learning curve involved, and I’m sure you are the first to ever attempt a chevalet build using this technology. Very interesting approach.

One thing I am wondering about is how you are going to maintain precise alignment to make your joinery work during the glue up of the thicker components…are you planning to shoot brads to hold the layers in place so they don’t slide around on you?

-- Aim high. Ride easy. Trust God. Neale Donald Walsch

View zombolina's profile

zombolina

18 posts in 664 days


#5 posted 03-10-2013 07:22 AM

Jim, I thought about using hide glue. But I do have a gallon of Titebond that I should use up. Something to think about…

Bob- I’m sure there is plenty missing! But I only posted the first sheet. I think I will end up with around 2 1/4 full sheets. But then, haven’t drawn out ALL of the parts…some things like the saw arm I might make separately.

Mat- funny you should bring that up, I was actually wondering that myself today…had I been thinking, I would have drilled more through holes and lined all of the parts up with a dowels. But I think I’ll just end up laminating 2 pieces at a time. We’ll see!

-- Success is the ability to go from one failure to another with no loss of enthusiasm. -Winston Churchill

View apprentice's profile

apprentice

201 posts in 826 days


#6 posted 05-12-2013 11:39 AM

Hi Sally

If you don’t have vacuum hold down you can use double sided tape to stick the board down sucurely.

If you use screws to hold things down, you can use brass, the carbide tipped cutters will handle brass no problem.

Does your operating system allow for set depth cutting passes, if it does, take a few passes to prevent tool breakages.

To right pictures, do it at source and save before uploading.

Davy.

-- http://www.youtube.com/watch?v=qcyhgsGA6mY&feature=player_embedded

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