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Re: Waste Board Dimensions

Posted: Fri May 01, 2015 1:17 am
by WillAdams
The extra row isn't worth it. Instead:

18" x 18"

17x17 array of holes == 289 T-nuts --- just less than 300 --- use up to 11 for fastening.

But, I only have 85 T-nuts, after clearing out 3 stores.... Maybe something like this?

Image

The 4 odd holes are for fastening it down.

Re: Waste Board Dimensions

Posted: Fri May 01, 2015 3:13 am
by WillAdams
But of course, we should be constrained by the 16" cutting area of the SO3:

Image

though I'm not finding that as attractive as the arrangement on the 17x17 grid.... is the consistent 1" spacing likely to be useful? Maybe just shrink the previous version?

Re: Waste Board Dimensions

Posted: Fri May 01, 2015 3:54 am
by LTEPM
Wouldn't you want to have a clamping area larger than the cutting area to allow work on larger pieces? I am planning on adding a 3/4" MDF waste board with routed t-slots. If that is too thick I will add 1/2" strips on the base to allow t-nuts and bolts. I would like to have a fence that I can reference jigs off of for repeatability.

If you are using MDF another trick you can use is drill a smaller hole and tap, then put thin super glue on the threads and let it soak in, dry, and repeat until it stops soaking into the MDF. When the glue is dry run the tap thru the threads to clean up. This may help reduce how many t-nuts you would need. You could scatter the T- nuts around the board.

I haven't received my SO3 yet, so planning by pictures here. Is the 16" x 16" work area on the base, or does it include any overhang area?

Re: Waste Board Dimensions

Posted: Fri May 01, 2015 4:31 am
by WillAdams
LTEPM wrote:Wouldn't you want to have a clamping area larger than the cutting area to allow work on larger pieces?
Yep. That's the problem --- how to accommodate the entire cutting area while only using the machine itself to cut things. I guess one could double up on staggered mounting holes, but it's a moot point to me, since I've pretty much decided on using an 18"x24" cutting board and making do w/ the T-nuts I have --- decided it's silly to populate w/ hundreds when I'll not likely use the majority of them.
I haven't received my SO3 yet, so planning by pictures here. Is the 16" x 16" work area on the base, or does it include any overhang area?
I get ~16 3/8" along the X-axis, ~14 11/16" from the endmill at its rearmost position to the front edge of the wasteboard, while the total travel is ~17 5/16", but it's ~9/16" from the edge of the wasteboard to the front of the endplate, so almost 3" of overhang cutting. I'll try re-measuring that in metric tomorrow to double check.

Re: Waste Board Dimensions

Posted: Fri May 01, 2015 4:45 am
by WillAdams
Third time's the charm.

Used the Golden Ratio to work up this:

Image

Should be easy to cut in two operations, will need to be clamped, then cut, then holes drilled through, rotated, drill two more holes, temporarily mounted, finish cutting, then install hardware, flip and mount.

Anyone want a triple layer ~23"x23" pegboard?

Re: Waste Board Dimensions

Posted: Fri May 01, 2015 1:08 pm
by newtothis
I sense Lord Vader's Tie fighter lurking in this pattern.
The force is strong with this one.

Is this meant to be milled by the machine?

Re: Waste Board Dimensions

Posted: Fri May 01, 2015 1:26 pm
by WillAdams
newtothis wrote:Is this meant to be milled by the machine?
Yes, that's exactly the problem I'm trying to solve:

- new user (w/o workshop) gets machine
- new user makes 1 (2?) trips to stores to purchase materials
- new user uses machine as needed to re-work purchased materials and hardware into usable spoilboard / workholding system

I think I've got it puzzled out....

Re: Waste Board Dimensions

Posted: Fri May 01, 2015 1:47 pm
by LTEPM
WillAdams wrote:
Yep. That's the problem --- how to accommodate the entire cutting area while only using the machine itself to cut things. I guess one could double up on staggered mounting holes, but it's a moot point to me, since I've pretty much decided on using an 18"x24" cutting board and making do w/ the T-nuts I have --- decided it's silly to populate w/ hundreds when I'll not likely use the majority of
If you have a handheld drill, you can make a hole drilling jig with the CNC to drill the holes in the outlying field the machine won't cut which also lines up with your machined holes for alignment. I've done this before for shelf pins and 32mm cabinet systems. you get pretty good accuracy, its not as precise as a CNC but close enough to to work fine in most cases.

Re: Waste Board Dimensions

Posted: Fri May 01, 2015 2:34 pm
by WillAdams
Yeah, it'll pretty much be necessary to either own a drill, or to unmount and re-orient the wasteboard itself to have the machine do the drilling (maybe by stacking one wasteboard on top of another?) I wouldn't underestimate the accuracy / precision of handwork though, especially w/ suitable jigs / fixtures and suitable patience.

Maybe I'm overthinking this, but I really believe in designing for / accommodating the lowest common denominator (and as phrased, it's an interesting challenge).

Re: Waste Board Dimensions

Posted: Fri May 01, 2015 6:29 pm
by mnolan1948
I've heard a lot of discussion on the waste board. I'm interested in building a case, not so much for sound but for dust. I haven't seen any comment about the height of the unit? Anyone have a suggestion as to size I should build my case? Making it out of plexiglass.