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CNC Cutting angled slots on the edge of a panel..?

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Forum topic by zombolina posted 11-16-2020 03:38 AM 463 views 0 times favorited 6 replies Add to Favorites Watch
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zombolina

37 posts in 2962 days


11-16-2020 03:38 AM

I need to make 2” deep notches on the edge of veneered plywood boards. Easy right? What if those notches are angled 10 degrees? Right now I’m doing them manually, with a circular saw, but I’d love to see if I can use the CNC.

My issue is that my 4th axis is mounted at the end of the bed, so there is no room to cut the pieces vertically.

Could they be cut with the panel lying flat on the bed using some kind of slot cutter?

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


6 replies so far

View gwilki's profile

gwilki

365 posts in 2438 days


#1 posted 11-16-2020 01:20 PM

Instead of laying the piece flat on the table, raise one edge on a slat or something that results in the piece being at 10° to the table. Then use a small straight bit to cut out the notches. You may need to square the corners of the notches depending on the size of the bit you use.

-- Grant Wilkinson, Ottawa ON

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Lazyman

6286 posts in 2352 days


#2 posted 11-16-2020 04:24 PM

I don’t see anyway to do that with them lying flat on the bed. I think that you would have to make a holder to mount them on edge but I think that tear out will be a pretty big problem, especially for pieces so thin. It will probably require backers on both sides to support the cut and even that might not prevent the tearout. A CNC is probably not the best tool for the job. I think that the table saw, possibly with a sled and dado, would be the best approach.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

View sras's profile

sras

5738 posts in 4093 days


#3 posted 11-16-2020 05:01 PM

If I had to make those cuts I would build a jig for my router.

The jig would have a slot to guide the router at the deisred 10 degree angle. It would fit ove the edge of the panel with enough size to keep the jig stable, allow for clamping and ensure the router wouldn’t tip.

Another way I might consider is a sled for the table saw and a dado head…

-- Steve - Impatience is Expensive

View DS's profile

DS

3604 posts in 3385 days


#4 posted 12-07-2020 08:39 PM

A lot depends on the type of machine that you have.

In a mass production environment, this would done on a pod and rail based point-to-point machine with an aggregate head with a wrist for horizontal milling.

Not sure this helps you, since, if you had a P2P machine, you might not be asking this question.

-- "Hard work is not defined by the difficulty of the task as much as a person's desire to perform it.", DS251

View zombolina's profile

zombolina

37 posts in 2962 days


#5 posted 12-07-2020 10:14 PM

Thanks all! There e fed up being enough space between the bed and the 4th axis. Good enough for a mock up
I just can’t figure out how to post the photo correctly rotated!

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

View DS's profile

DS

3604 posts in 3385 days


#6 posted 12-08-2020 05:18 PM

That works too.
Your project is very interesting.
I can’t say as I’ve ever seen anything like it before.

As for the photo, the website has some quirks that it doesn’t recognize some rotation setting or some such.
If you edit the photo, rotate it there, then save as a new file with the correct orientation, it seems to work

There is a whole thread here about it – somewhere.
It’s an old issue that many feel should have been fixed long ago.
We just learn to deal with it.

-- "Hard work is not defined by the difficulty of the task as much as a person's desire to perform it.", DS251

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