July 27, 2018 at 12:33 pm #64794
So after well over a year of poor project management, I’ve finally gotten past the “part collection” stage of my MPCNC build. \o/
I originally wanted to be able to swap out the “core” of the machine in order to route wood or plasma cut metal. In the end I decided to scrap that idea – too much hassle to get to the goal, and not enough payoff. 😉
The revised machine design is going to be built for a roughly 24×24 work area. The frame of the machine will be separate from the working area in order to provide a bit more flexibility.
Attached is a photo of the frame design. It’s made from 2x4s that will be cut down to 3-1/4″ x 1-7/16″ and 2x6s cut down to 5-1/4″ x 1-7/16″. This will help ensure that the framework is as straight as possible. The legs will be simple 4x4s with no squaring ops done.
The cutting area will be a torsion box that’s 24 x 24 x 5-11/16. The odd height will allow for a 3/4″ thick spoil-board. The tortion box will be built with an open interior structure in order to allow for airflow. Once built, I’ll cut a vacuum plenum and t-track slots into the top surface. The plenum will be multi-zone, although I haven’t decided if I’ll go with four large zones or a mixture of larger and smaller zones. The drawing for this hasn’t been done yet, but I know how it’ll look in my head. 😉
I’ve got all the dimensional lumber and sheet goods for this thing, so hopefully I’ll be able to start cutting wood soon. 😀
Attachments:July 27, 2018 at 2:20 pm #64801
I can’t wait to see this Beast come together. I am sure it has been stewing around in your head for a while!July 27, 2018 at 2:43 pm #64806
‘Bout time! ?July 27, 2018 at 4:20 pm #64810
Ok, here’s the vacuum plenum:
Here’s the torsion box:
I’m going to try to avoid using my ShopBot for any of this. 😉 The torsion box holes won’t look like that – I’ll use a hole saw to cut the ends and a jigsaw to cut out the center. I should probably run a roundover bit on the edges as well.
Attachments:July 27, 2018 at 4:34 pm #64814July 27, 2018 at 4:41 pm #64817
Cool!July 27, 2018 at 4:42 pm #64818
Before you get to crazy with it, remember it is off centered in work area.
1 user thanked author for this post.July 28, 2018 at 11:15 am #64872
What do you mean by “off centered”?
g.July 28, 2018 at 11:21 am #64873
Closer to a corner, for me the way I always build mine, the work area is skewed to the lower left corner.July 28, 2018 at 11:27 am #64874
So basically, the “best practice” here would be to not set the torsion box in place until after the rest of the machine is built? The idea being that once the machine is built, I’ll know where 0,0 is for 100% certainty and can fix the torsion box in place at that time?
g.July 28, 2018 at 11:37 am #64875
If you are using a dewalt 660 I can get you a dimension if that helps.July 28, 2018 at 11:37 am #64876July 29, 2018 at 5:11 am #64928
Or like I did and make it too small… but somehow in only one dimension… stupid maths.July 29, 2018 at 2:01 pm #64995
I’m using a 400W spindle. I’ll just go ahead and build out the framework and go from there. I’ve got a deck to build before that though. 🙁
g.December 18, 2018 at 4:18 pm #79913
I’m FINALLY getting to cut parts for the machine base!
Two 2×6’s cut down to 5.25″ wide and four 2×4’s cut down to 3.25″ wide. They’ll be pocket-screwed and glued together to form the side frames that you see in the renderings I posted above. They’re 60″ long.
We’ll see how much I get done tomorrow. 😀
Attachments:December 18, 2018 at 6:05 pm #79925
You have more patience than anyone I know. Knowing this machine has held you interest over these last few years does make me feel good!
1 user thanked author for this post.December 19, 2018 at 6:17 am #79976
It’s not so much “patience” as “project overload” and tiny fragments of time to work on things. I’m sticking with the 4×4 build area and I’ll figure something out for the axis supports.
You’ve got a great, usable design in the MPCNC Ryan. It’s something to be proud of for sure.
1 user thanked author for this post.December 20, 2018 at 4:47 am #80099
Hey Ryan, think he’ll have it done by MRRF? ???December 20, 2018 at 6:39 am #80104
Don’t hold your breath. 😉
g.December 20, 2018 at 10:14 am #80116December 20, 2018 at 1:38 pm #80143
hahahahahahahaDecember 20, 2018 at 1:51 pm #80150December 20, 2018 at 2:12 pm #80155
Oh dang, you are not messing around Gene….Barry I think you got to him!December 21, 2018 at 11:31 am #80239December 21, 2018 at 5:41 pm #80294
The 2×6 between the two rails is 36″ wide. I cut it based on the wrong assembly drawing. ? I’d have cut the other ones (55.375″), but the power switch on my dust collector sh*t the bed on me.
Just twist the wires together, it works for telco guys…December 23, 2018 at 2:54 pm #80476December 23, 2018 at 3:05 pm #80478
I see some room in that dream shop for my tent and a blow up mattress, can’t wait to move in. Don’t worry I can sleep through any noise you might make.December 23, 2018 at 3:23 pm #80484
If you can sleep through the two vacuum motors I use for the ShopBot, you’re either deaf or dead. 🙂
g.December 23, 2018 at 3:49 pm #80487
What? I can’t hear you? Sorry I spend a lot of time around loud tools, and my younger days were full of sub-woofers, my hearing is gone.December 23, 2018 at 3:50 pm #80488
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