Hey guys,
Building a bookcase-like part from 18mm material. I have designed the shelves to sit in 9mm rebates, and added a 150mm-wide mortise-and-tenon to the centre of the shelf (images below illustrate this better than I can describe it in words!).
Designed in Sketchup, imported into V Carve Pro V9, added fillets in V Carve Pro, all good.
Now it's time to set the toolpaths on the larger side panels (the shelves are easy of course). Because there are two tool paths on top of each other - the through-mortise, and the rebate, I am not sure how to make the geometry for toolpaths. I feel like there should be two sets of geometry, one for the mortise, and one for the rebate. So should I just draw more geometry on top of existing geometry?
Some of the edges form part of the whole side panel, so it seems like I need to split or "break" those edges around the mortise so I can select only the mortise-related geometry to make a toolpath. Is that even possible in V Carve Pro? Is it the right approach?
Help!
Best approach for cutting mortices inside rebates?
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Best approach for cutting mortices inside rebates?
- Attachments
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- centre open shelves v2.crv
- V Carve Pro job file.
- (37.5 KiB) Downloaded 100 times
- martin54
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Re: Best approach for cutting mortices inside rebates?
I can't open the file because I only have v9 on this machine, I don't use sketchup but have read (I think) that there are 2 import types, one as a 3D model & one as 2D vectors, if that is the case then importing the 2D vectors will probably give you the 2 sets of geometry you need to toolpath them separately
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Re: Best approach for cutting mortices inside rebates?
Thanks Martin54,
Here's the import vectors options I have - no 2D / 3D option there...?
After importing vectors and un-grouping them, I can select things like this panel (not useful for this job, as that's not being cut):
And this, the rebates (perfect for this job):
But not this, the mortise (which is the problem I am trying to solve):
Of course, I could just over-draw a rectangle for the mortise, but I understood that was not the best way to resolve this... Or maybe it is in this case?
thaks.
Here's the import vectors options I have - no 2D / 3D option there...?
After importing vectors and un-grouping them, I can select things like this panel (not useful for this job, as that's not being cut):
And this, the rebates (perfect for this job):
But not this, the mortise (which is the problem I am trying to solve):
Of course, I could just over-draw a rectangle for the mortise, but I understood that was not the best way to resolve this... Or maybe it is in this case?
thaks.
- FixitMike
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Re: Best approach for cutting mortices inside rebates?
Put the mortise on a separate layer and group the vectors to make it easy to select. The mortise will have to have all 4 sides to make a complete vector to be pocketed.
Don't forget to include clearances (dogbone fillets) where necessary for inside corners.
Don't forget to include clearances (dogbone fillets) where necessary for inside corners.
Good judgement comes from experience.
Experience comes from bad judgement.
Experience comes from bad judgement.
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Re: Best approach for cutting mortices inside rebates?
Got it, thanks Mike.
- Adrian
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Re: Best approach for cutting mortices inside rebates?
As an aside the 2d/3d import part of Sketchup is controlled by how you import the file. If you use the import 2d vectors command then you get the 2d vectors as you have and is what you want in this case. If you use the import component command on the modelling tab then you get the 3D version of the same thing.
- adze_cnc
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Re: Best approach for cutting mortices inside rebates?
Here's my take on the mortise and dado problem. Shapes placed in appropriately named layers. "Dog-bone" fillets presume a 6mm cutter.
Why I extended the length of the mortises by 12mm is the question of the day...
I can see the following toolpaths (all presume 6mm cutter):
EDIT: I knew something was wrong: I only had to extend the mortises by 6mm. Sigh.
Why I extended the length of the mortises by 12mm is the question of the day...
I can see the following toolpaths (all presume 6mm cutter):
- pocket for dado
- pocket for mortise (start depth=mortise depth; cutting depth=thickness-mortise depth)
- outside profile to cut out the gable and shelves
EDIT: I knew something was wrong: I only had to extend the mortises by 6mm. Sigh.
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Re: Best approach for cutting mortices inside rebates?
Hey Steven,
This looks great, thanks.
To make the mortises, did you just draw rectangles over the existing geometry (on a new layer), then add fillets?
Also, when you say 6mm, do you mean 1/4-inch (6.3mm)?
This looks great, thanks.
To make the mortises, did you just draw rectangles over the existing geometry (on a new layer), then add fillets?
Also, when you say 6mm, do you mean 1/4-inch (6.3mm)?
- adze_cnc
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Re: Best approach for cutting mortices inside rebates?
Mortises: I just moved your vectors to the new layer and added the dog-bone fillets.
I saw your file was in mm so I figured you'd be using metric cutters. By the way: I'd never refer to a 1/4" cutter as 6.35mm (except now)...
It would be easy enough to recast the fillets into 7mm ones to match the shelves.
The dadoes were drawn over the existing vectors (to get the dado height and gable width). They were then lengthened by the "set size" transform tool changing the x length (unlinking the X & Y axes and anchoring to the centre).
I saw your file was in mm so I figured you'd be using metric cutters. By the way: I'd never refer to a 1/4" cutter as 6.35mm (except now)...
It would be easy enough to recast the fillets into 7mm ones to match the shelves.
The dadoes were drawn over the existing vectors (to get the dado height and gable width). They were then lengthened by the "set size" transform tool changing the x length (unlinking the X & Y axes and anchoring to the centre).