Someone asked about the C-525 version again & I am getting ready to finally upgrade myself to this version, so I added BoschMount_X_C-525_Rev37.stl & BoschMount_Y_C-525_Rev37.stl files to make it easier to sort out. Print one of those depending on which orientation you want the vac connection on. All the other parts should be the same.
I fixed my problem with the vac connection & made it part of the quick disconnect. I am pretty happy with it now. I ran a 1.5 hour cutting job with no problems. I also got rid of the slanted cut for the top of the router mount as it did not seem necessary and also allows you to rotate the router the way you want it.
Looks like I need to shorten the height of the bottom vac attachment. Don't know how I missed this, but the bottom of the vac piece is too low unless you have a long router bit. I will revisit this design next week to see if I can shorten it the correct amount. Meanwhile, I have deleted the bottom vac attachment from this design.
I started updating my vacuum connection recently for the MPCNC that I have after finding this interesting idea for a dust shoe. http://www.thingiverse.com/thing:200583 After remixing it, I realized I could make this in 1 part instead of 2 & print it without supports. About the time I finished doing this, I came across a quick release mount for the Bosch, http://www.thingiverse.com/thing:648883 I initially did not see that someone else had remixed this to work on a MPCNC. The original design worked pretty good without any alterations. The major changes I made to the quick release design were to make the 2 cams only 1 part & made the cam about 1mm longer with a flat part of cam to hit the arm which held it in place better for me. That wider flat part where it hits the arm made a big difference in having a snap fit. You can hear this snap in the video I uploaded. Using a wider cam instead of the 2 smaller cams also made this connection more solid. For the 2 part mount I added the 10 degree slant cut to fit the Bosch rather than having it even at the top. If you do not want that, you can comment it out in the openscad file.
This is for the original 3/4" EMT MPCNC. I did make an option for the newer C-525 version, but that will be an untested version until someone else tries it.
I uploaded a 37 second video (previous design) of how this mounts together. https://youtu.be/sbKFyQ6KR_E
After completing the quick release modification, I had to change my vacuum attachment so it would not hit the quick release when taking the router off. That turned out to be fairly easy to fix by making sure the vacuum duct was below the bottom of the mount & adding an angled adapter for the vacuum. I do loose about 1.5" of cutting length along the Y-axis. If you do end up needing that extra 1.5" of cutting on the Y for some project, you can just disconnect the vacuum attachment for those cuts.
I included STL & openscad source files. The Mount & Arm quick disconnect I made 2 versions of. Make sure if you print the X-Axis or Y-Axis version of one, you print the same of the other. There are 2 versions in case you care which axis you loose some space from the vac connection. If you need clarification of which to use, take a look at:
BoschMountAssembly_Rev36.scad file & set the variable:
Vac_Orient = 0; //0 = along X-Axis, 1 = along Y-Axis
STL files to print:
BoschMount_X-Axis_Rev36.stl (50% to 60% infill)
armWithVac_X-Axis_rev36.stl (50% to 60% infill)
BoschMount_Y-Axis_Rev36.stl (50% to 60% infill)
armWithVac_Y-Axis_rev36.stl (50% to 60% infill)
or for C-525 version along X-axis
or for C-525 version along Y-axis
Latch__2x_Rev20.stl (50% to 60% infill)
Pins_3x_Rev21.stl (50% to 60% infill)
cam_Rev24.stl (50% to 60% infill)
Vac_Adapter_32_8Ang_Rev20.stl (20% infill)
Optional parts to print:
If you need the tool holder nut & drilling guide for this configuration, I included the STL files:
There is also an image showing the nut trap spacing for further clarification.
I printed most of the parts in eSun PETG, but did print the bottom vacuum connection & adapter in PLA.
In addition to the Vac_Adapter_32_8Ang_Rev20.stl that puts the vacuum hose vertical, I added a 30, 45 & 57.3 Angle adapter to use at different angles. The 57.3 should put the angle horizontal. I have not seen anyone connect the vacuum hose horizontal at the tool mount & might not be a good idea, but thought it might be worth experimenting with since this would keep from loosing any cutting distance along the Y-axis.
I included the openscad source files along the STL files. The profiles for the vertical 3/4" EMT connections are in a DXF file which should make it easier to adjust for another EMT size.