New Build From Virginia, US

Been a lurker for years and finally decided to take the plunge. Over the holidays, I printed out the parts for the Primo. I am also working on my own version of the control box.

Goal is to control the Primo, be able to turn the Dust Collection and Router on and off from the board and have an E-Stop.

I have laser cut the acrylic sheets for the box and printed the connection pieces. (I do not like the tabs and slots you see on laser cut boxes).

Anyway, as I progress, I will post progress. I ask that if anyone sees anything that will cause me issues later, please let me know.


@ScrapheapInd welcome to the madness! :grin: That looks like a fun size. I’m thinking about shrinking mine down similar to that and building a LR3 for larger stuff.

So it looks like you’re using a DB37 for all your cables coming into the box. I guess you’re going to have an octopus cable going to the machine? I’d like to see how that turns out when you’re done.

Best of luck!

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I figured this was a good start and if I wanted to go bigger, I have room on the bench.

I am using the 37 pin connector. I am still working on cable management and how I want that to work. I do plan on using drag chain. I will post more as I go along. I will need to get the power to the router, so I am worried about interference.


If anyone finds this useful, I made a small part to adapt the ends of the x and y rails to cable glands.


Some progress.

End Stop screws arrived, so those are installed.
Everything is squared.
Worked out the design for my drag chain. I will add it to Thingiverse if anyone would like to use it. But, I am still waiting on the aluminum to deliver (tomorrow) and will post it all as soon as I get that installed.

The chain for the Z is made from 3mm Acrylic laser cut and the plug in the EMT is a split bushing and a draw cone inside to hold it fast.

I made the x rail 200mm longer and the y rail 100mm longer to accommodate this design

More to follow.


Looks interesting, the recommendation is to not fasten anything to the Z-Axis though. There are a few models that circumvent this.


Well, the control box works. Tons of wiring done. I’m going to recut the front to accomodate the ESP board.
Not sure why the oriented it this way, but whatever.

Box works as follows
Estop drives a 20a contactor.
24v PS drives the board and switches to the 10a relays for the router and future dust collection.
Steppers and stops are wired to the 37 pin connector. Had to use a heat gun to mold the wires. They are pvc coated and stiff as a board.

One less thing.


Did i flash the correct tft firmware? There’s a lot of printer stuff on the screen. Please let me know if i goofed up.

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As far as I know (when this question occurred the last time) there is quite a bit about printers in the menu since it is Marlin-based. It’s mostly without function though I believe.


I assumed as nuch, but i didnt want to assume, ya know.

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If it has the V1 logo, then it is alright.

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That enclosure is next-level!

I’m still trying to figure out what I want to do with the electronics. I printed a couple of enclosures I found online, but not loving those.

I may just go simple and mount the boards and SS relay to a piece of plywood and make a simple frame and lid. Really want to get my MPCNC cutting. Been over two weeks since I got a perfect crown drawn…need to make some chips!


You’re not alone.

Simple sounds like the smart move to me. Am almost finished making an enclosure… The problem is, I’ve been almost finished for a few days… I refuse to let common sense, or Fusion 360 win.

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Are we related? :wink:

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Minor progress. Waiting on a hardware replenish to finish drag chains, but belts are done, box is done except programming the ESP Wifi. Z and Y drag chain installed. X is being stretched and flattened in the background. Now i have to wire up the steppers and stops.

If y’all see anything wrong, please let me know.


Dude, you are rocking it! Great work!

The control box is really sexy. I used a broken CD player I was able to salvage from the school’s trash as a control box. :smiley:

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That was my original plan. I bought an old DVD player from the Goodwill for $1.99. Then I got a laser…

In Germany we have a saying: “Zwei Dumme, ein Gedanke” which loosely translates to “Two idiots, one thought”. :smiley: Pretty fitting I guess.

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