I could use some advise on how to cut this part.

[knight_toolworks]

Here is a job I have and I want to make sure I do it right.
Here is the part it is about 4.5x4” and the max cut is 2.25” deep.
The fellow who made this did it all with a hard held router. It took him hours to make the jigs.
Anyway I was going to do it all in 3d but I think that would be slow and less accurate in the one place I need accuracy. Also cutting that deep may be a pain.
The most accurate cut needs to be the front v cut it is cut with a 90 degree bit. That slop need to be very accurate and the right thickness. The rest does not have to be super accurate or smooth. I was thinking of cutting it all in 2d but for the large slope that I could only think to do in 3d.
Any idea’s on this?



8639

[beacon14]

I would only do this in 2D, either in PartWizard or VCarve (I use VCarve). The entire inside gets an Area Clear or Pocket down to the first ledge or shelf. Then pocket everything that's left down to the next shelf, and so on. The sloped areas are hard to make out exactly from the picture but they would be done last either as Machine along Vector or using V- Carving.

For accuracy of the sloped surface you could zero both bits off the table and use the straight bit to surface off the tops of the walls to a known height. Or just zero the V-bit off the top of the each box.

Hopes this makes sense and maybe helps

[knight_toolworks]

I will use v carve. but the second slope is about 1.5" deep so how could you do it in 2d? make several vectors at different depths?

[harold_weber]

Its hard to see exactly what the inside looks like, but it might be very easy to slice the design into 2-3 pieces and use the Bot to machine dowel pin holes to register the pieces when you glue them together. At least this would save the expense and vibration of the extra long cutter(s).

[knight_toolworks]

the wood is way to thin to dowel. they don't want any seams either. this is a high end part. I can handle the long bits I have been cutting almost 2" with a 1/4" bit a 1/2" bit will be easier. Plus I can take as many passes as needed.

[beacon14]

In VCarve just use the Vcarve/Engraving Toolpath option and specify the bit geometry. The angle of the bit will have to be precise (or enter the actual angle if you can figure it out) or else the walls won't come out smooth.

Here's a screenshot from VCarve

8640

[knight_toolworks]

yes thats fine for the first one and what I planned on doing but for the larger slope how would I do it?

[beacon14]

You just draw the outline and specify the bit and VCarve does the hard part - not sure if you are asking for something more complicated than that - VCarve will figure out the multiple passes required. The screenshot above was of a 1 1/2 wide 1 1/2" deep slot machined with a 1" diameter 90 degree bit.

[knight_toolworks]

the front one is easy as you say. it is not as deep as the bit. but the second slope that I am worried about it is about 1.5" deep. I was thinking of doing that one in 3d. it does not have to be as smooth or as accurate. only the first v has to be exact the rest s just removing the bulk .

[knight_toolworks]

here is an outside picture
8641

[beacon14]

OK it's making more sense now - the sloping area with the vertical ends - probably has to be done with a 1/2" or 3/4" ball-end bit.

If you don't have 3D software since it's a simple slope you could draw a section of it, figure out the start and end points of the bit, and write a routine to do the cutting - it's highly repetitive. Or pay someone with ArtCam a few dollars to take care of it.

[knight_toolworks]

I have a fellow who will draw it all out.
the front cut I just can't see doing without some wacky jig to get the piece so the cut would be horizontal. but the fellow can do that cut pretty fast.

[srwtlc]

As you say, a jig to hold it horizontal and use something like a 1.25" bowl cutter with multiple passes. Or, depending on the angle, could you cut it with a v-bit (90º) by increasing the depth and step to make the slope?

Either way being done after pocketing out the main area.

[drodda]

Alright I will be the one to ask? What is it?

Looks like a barbie hot tub?

[knight_toolworks]

the guy am doing it for will do the front. he can do it pretty quickly with a router and a jib and little sanding. if I did it it would take longer to sand it then he would take to cut it.
ok here is the first prototype. took some work to draw out by my friend. the first v cut is not quite deep enough but other then that it's pretty good. this is a stand for a ipod and an custom amp for the ipod on the inside.
8642