This is a 1.5" dust collection hose riser for the MPCNC. The riser keeps the vacuum hose and cabling to the router out of the way and off the stepper belts. Cabling can quickly be adjusted/changed via the snap close wiring mounts.
For my MPCNC build, I am using 1.5" vacuum hose (actually 1.5" bulge pump hose from Home Depot) connected to a shopvac for my dust collection system. To keep the hose for hitting the belts and just getting in the way of the x-axis on my MPCNC build, I made a hose riser to keep the dust collection hose vertical and out of the way of the MPCNC during cutting.
The riser uses (2) two 3D printed lower mounts that are screwed into the back of the MPCNC table, (1) one 3D printed upper mount. The mounts are designed to tightly slide onto standard 3/4" aluminum angle from Home Depot. The hose is then zip tied around the aluminum angle.
As an added bonus, I included an all 3D printed hinge/clasp that holds all of the wiring that needs to run out to the router and gantry (z-axis motor lines, router power cable, z-axis end stops, or whatever else you desire). That's right - nothing to assembly. Just print the mounts slide in the aluminum angle, screw to your MPCNC table and then just clip the cables in and zip tie the hose to the riser.
For the business end of this dust collection system, I am using a modified Das Boot design (http://www.thingiverse.com/thing:1875449) and a homemade dust skirt that I made from duct and electrical tape. My system is powered by a cheap $20 Buckethead vac from Home Depot that fit over a standard 5 gallon bucket. So, all in I spent about $35 on this dust collection system for my MPCNC.
Print (2) two 3D printed lower mounts and (1) one 3D printed upper mount. I used 20% infill and printed in black ABS.
Slide the (2) two bottom mounts onto the 3/4" aluminum angle. The position will depend on your MPCNC table design, but try to space them far enough apart to get a stable mounting.
Now, slide the upper mount onto the opposite end of the aluminum angle.
Snap your 1.5" dust collection hose into the 3D printed mounts. Then secure the hose with zip ties.
Run your cables through cable holder and snap the clasp closed. If you want to make your build cleaner, zip tie the cables to the dust collection hose out to the router/gantry.