Help creating molding / door toolpath

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jdonaldson
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Model of CNC Machine: Camaster Stinger Epilog Aspire
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Help creating molding / door toolpath

Post by jdonaldson »

I'm getting close but can't seem how to get my molding toolpaths
even, the keep cutting to deep. The inside one is correct on the
outside but cutting into the center raised part were it should be
even. I probably didn't explain it well but hopefully the pictures will

Thanks for your help

John
20210525_151344.jpg
Attachments
door.jpg
cabinet_door_2.crv3d
(124.5 KiB) Downloaded 70 times

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dealguy11
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Re: Help creating molding / door toolpath

Post by dealguy11 »

There are 2 things contributing to this problem. The first is that the profile you are using for the raised panel and inside molding profile is not even on the 2 sides - the inside of the profile (on the raised panel side) is slightly shorter than the outside of the profile. Make them even.

The second thing contributing to the problem is the 0.13" boundary offset. Because the inside profile is shorter, the bit is coming over the top and moving into the interior of the door by 0.13", leaving the little flat you're seeing. FWIW, I never use the boundary offset option, partly because it makes problems like this even worse. If I need it, I create additional steps on the actual geometry of the profile vector so that I can precisely control the behavior of the bit.

Finally, did you notice that you're cutting off most of the outer edge profile when you cut out the door? Is that what you intended?
Steve Godding
Not all who wander (or wonder) are lost

jdonaldson
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Posts: 68
Joined: Tue Mar 02, 2010 10:46 pm
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Location: Austin TX

Re: Help creating molding / door toolpath

Post by jdonaldson »

Thanks Steve for the quick response, i will make those changes and
hopefully be ready to cut out my doors. Also thanks for pointing out
that i was cutting off part of my outside profile, i was focused on the
other problems and didn't notice.

John

jdonaldson
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Posts: 68
Joined: Tue Mar 02, 2010 10:46 pm
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Location: Austin TX

Re: Help creating molding / door toolpath

Post by jdonaldson »

Well i guess the clue bird still hasn't landed after trying to modify my original two profile cuts
i decided to actually cut a sample from a door and make one complete molding tool path but
i still end up with the ridge. BTW this is smaller than my original to fit on my sample board
cabinet_door_Mini_A_1.crv3d
(183.5 KiB) Downloaded 52 times


minidoor.jpg
DoorSample.jpg

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dealguy11
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Re: Help creating molding / door toolpath

Post by dealguy11 »

Several things to discuss here.

First, the cause of your problem is that the curved portion of your profile to the right does not come up to the top of the profile. Because it doesn't, when the center of the bit comes to the end point on the right, it is below the surface of the material, leaving a ridge. I've attached a file with an alternative to address this.

OTHER THINGS:
1. Why do this as a single profile? That just adds time to cutting. Instead, make it 2 profiles, one for the outside profile and one for the inside sticking and panel profile.
2. If you do leave it as a single profile, then you need to fix the flat part of the profile as it is not 0 degrees. Because it is a very slight angle, you can't use the "Skip Flat Regions" option. The very slight out-of-flat means the surface of the door won't be square. I fixed this in my alternative profile.
3. The drop round profile is distorted and should be fixed. The vertical section is not vertical. On the curve, there is a bump at the top and an undercut at the bottom. Normally this kind of profile is an arc. Often the length of the vertical is either 3/32" or 1/8" so that paint bridging doesn't obscure the step. I fixed these in my alternative profile.
4. The panel profile doesn't need so many nodes. I fixed this.
Attachments
cabinet_door_Mini_A_1 Alternatives.crv3d
(206 KiB) Downloaded 62 times
Steve Godding
Not all who wander (or wonder) are lost

jdonaldson
Vectric Apprentice
Posts: 68
Joined: Tue Mar 02, 2010 10:46 pm
Model of CNC Machine: Camaster Stinger Epilog Aspire
Location: Austin TX

Re: Help creating molding / door toolpath

Post by jdonaldson »

Steve,

Thanks again, by taking your " Fixed Profile " and comparing it to mine I think
I understand now. I did go back to two profile cuts and it definitely made a big
difference in time. Again thanks for taking the time to help this old guy ( 68 ) out

John :D

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