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Chamfers - How to draw
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Willw  
#1 Posted : Wednesday, October 14, 2015 12:31:29 PM(UTC)
Willw

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I have Viacad pro with the latest update downloaded. Here is what I want to do. Say for example you have a board 3/4" thick by 10" long and 2" wide. I want to show a 1/4" x 45 degree chamfer stopped 2" from each end of the 10" long side that is cut on a router table. It is easy to run a chamfer the total length so there must be an easy way to do this. Thanks for your help.
Will
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L. Banasky  
#2 Posted : Wednesday, October 14, 2015 1:48:23 PM(UTC)
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There is probably an easier way, but if this is what your looking for, it was done with the "TRIM SOLID" tool.
Draw a profile and trim, or even extrude and "SUBTRACT SOLID".
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Tim Olson  
#3 Posted : Wednesday, October 14, 2015 3:50:14 PM(UTC)
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Hi Will
You could also try the Dado tool with blinds. Larry's method gives you more flexibility however.
Tim


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L. Banasky  
#4 Posted : Thursday, October 15, 2015 6:29:18 AM(UTC)
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Thanks Tim,
That was much easier. I don't know how you obtained a 45 Deg. chamfer though, please explain.
I had to use a .125 X .125 Dado, and then a .125 chamfer for the edges, and then a .354 fillet
if a fillet is required.
Thanks again,
Larry
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Willw  
#5 Posted : Thursday, October 15, 2015 8:07:02 AM(UTC)
Willw

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Thanks Larry and Tim,
Getting close now. Who would think something so simple would be so hard. This will help all woodworkers out. Yes I need the rounded out at the end as if cutting on a router table. Was able before to make the same cut Tim showed but the square corners do not work. Thanks again.
Will
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mitchb  
#6 Posted : Thursday, October 15, 2015 9:35:41 PM(UTC)
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My solution is to make three parts, two ends an a center. Use a vertex chamfer on the ends and a length chamfer on the center then use Add Solid to make the three pieces one.

Mitch
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murray  
#7 Posted : Friday, October 16, 2015 2:35:03 AM(UTC)
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A router couldn't cut the vertex chambers that you used. Chamfering the centre block, adding the ends and either a conical subtraction or a linear fillet will give a manufacturable result.
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Tim Olson  
#8 Posted : Friday, October 16, 2015 10:04:15 AM(UTC)
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How about this attempt?

This is associative. Modify the original piece and everything updates.

I had to use a fixed width fillet of 0.25 on the Stopped Dado ends.

Tim

Edited by user Friday, October 16, 2015 10:06:16 AM(UTC)  | Reason: Not specified

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Willw  
#9 Posted : Friday, October 16, 2015 10:07:03 AM(UTC)
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Thanks to Mitch and Murray and everyone else. Look at the file in my first post and it shows the process I used to make the chamfers. There still my be a better way so more ideas are welcome. Tim, this would be a good to add to the woodworking joints.

Will

Edited by user Friday, October 16, 2015 12:11:27 PM(UTC)  | Reason: Not specified
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Tim Olson  
#10 Posted : Friday, October 16, 2015 12:46:44 PM(UTC)
Tim Olson

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Hi Will

>> Tim, this would be a good to add to the woodworking joints.

I was thinking along that line as well. But I'm not clear on the transition/fillet area. A google on Stopped Chamfer gives a variety of results.

Tim
Tim Olson
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Willw  
#11 Posted : Friday, October 16, 2015 1:14:23 PM(UTC)
Willw

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Tim,

Most chamfers are cut with a router with a bearing on it. Having the corners with the cone shape will be great for 95% of us. I tried your example doing a dado then did the chamfer but used the cone at the end and cut it out. The length of the dado is then correct and is less steps than I had.

Thanks, Will
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Ffdsagf  
#12 Posted : Wednesday, October 21, 2015 9:18:29 PM(UTC)
Ffdsagf

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Larry's method gives you more flexibility casesam.co.uk

Edited by user Thursday, October 22, 2015 8:22:39 PM(UTC)  | Reason: Not specified
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