Adjustable Angle Clamping Fixture

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4DThinker
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Re: Adjustable Angle Clamping Fixture

Postby 4DThinker » Sun Mar 06, 2016 8:06 am

4D
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4DThinker
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Re: Adjustable Angle Clamping Fixture

Postby 4DThinker » Sun Mar 06, 2016 8:07 am

4D
Tilt Platform Low angle1.jpg
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4DThinker
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Re: Adjustable Angle Clamping Fixture

Postby 4DThinker » Sun Mar 06, 2016 8:08 am

Tilt Platform Low angle2.jpg
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All parts were cut out on the Meteor shown in these photos.

(2) Arcing connecting brackets.
(1) Clamp board.
(1) Top rail plate.
(2) Top rail pivot brackets.
(2) Vertical extension plates.
(2) Angle connection/locking plates.
Assorted insert nuts, bolts, etc..

4D

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HANNAH024
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Re: Adjustable Angle Clamping Fixture

Postby HANNAH024 » Sun Mar 06, 2016 8:17 am

4DThinker
Very Nice!

I mounted my joint fixture to the cross brace that I put on my comet instead of to the front of the machine.
I don't know why. Just the way I did it. It was fixed in the vertical positon.
Now I am in the process of making an angle attachment very similar to your unit.
Thanks for the pictures. They gave me some new ideas.
I may make a few modifications to my unit after seeing your pictures.
I'll let you know when it is finished.
It is what it is!
Have a great day.
HANNAH

4DThinker
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Re: Adjustable Angle Clamping Fixture

Postby 4DThinker » Sun Mar 06, 2016 8:26 am

Thanks Hannah024. I've been using the center rail but found that it will rotate slightly under heavy clamp weight. Even after tightening down all the angle bracket screws probably more than I should have. The front rail being bolted to the frame end plates is both vertically stable and always parallel to the gantry. The router approaching the front rail has the gantry and Z lift behind where it is less likely to encounter clamps.

4D

edison auto
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Re: Adjustable Angle Clamping Fixture

Postby edison auto » Mon Mar 07, 2016 2:06 pm

looks like it works very well. nice setup

4DThinker
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Re: Adjustable Angle Clamping Fixture

Postby 4DThinker » Mon Mar 07, 2016 4:13 pm

4DThinker wrote: I've already realized I can simplify the design a bit. May have to remake the top plate and pivot ends that bolt to the rail. Those ends could be extended down to also serve as the locking point for the platform. That would eliminate the need for the oak vertical extensions I'm currently using.

4D
I made a revised top bar pivot part that extended down and replaced the oak vertical extensions. Too much play in the new version with only one connection point to the bar. Put the oak pieces and original top bar back in place and learned to stick to my original solution. It is a little more trouble to install, but amazing how much more stiff it is than the simpler version.

4D
Last edited by 4DThinker on Sat Mar 12, 2016 3:33 pm, edited 1 time in total.

4DThinker
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Re: Adjustable Angle Clamping Fixture

Postby 4DThinker » Wed Mar 09, 2016 11:46 am

To measure and set the angle on this fixture I place a tri-square on the top edge, stick the digital gauge to the metal blade, then adjust the fixture until the gauge reads my desired angle. Gauge goes down to tenths of a degree. Close enough for woodworking. I zero out the gauge on the side rails of the frame before setting it on the fixture. My CNC isn't sitting on a level floor, but the gantry runs on the frame rails so they are my planar reference.

Measuring Angle.jpg
Digital Angle Gauge
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4D

4DThinker
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Re: Adjustable Angle Clamping Fixture

Postby 4DThinker » Wed Mar 16, 2016 6:03 pm

I'd like to also add that the advantage of using the front rail is that you can cut angled pockets or slots just about anywhere on the face of a board. You just need enough of the board on the fixture to clamp it securely. Any of the board extending above the table at an angle above 15 degrees or so past vertical will be clear of the approaching router/gantry. This fixture strategy has let me cut steep angled slots for students projects that were virtually impossible to cut using any other tool in the shop.

4D

Bobtail Farm
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Adjustable Angle Clamping Fixture

Postby Bobtail Farm » Fri May 06, 2016 4:29 am

Thank you for the inspiration 4DThinker!

My first go at making the fixture pictured in the attached. Already have some ideas for refinements, but will wait for Ver 2.0 after I've gotten used to it.

(no, I regret to say i don't have a probotix machine, but the ideas passed around on the web-site are too good to pass up reading; thanks).

Brian.

Bobtail Farms
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IMG_3249 adjustable vertical vise temporarily installed.jpg
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