Building a CNC - Z-Axis

This week was all about building the Z-Axis frame.

For this one (since it is a lot smaller) I went for a couple of SBR16 linear rail guides.
It's made of two parts:

Z-Axis front plate (left) and back plate (right)

The back plate (smaller plate) is where the X-Axis bearing system is fixed. This is also where the RM1605 ball bearings nut will be attached. The mechanism is similar to the X/Y-Axis interface I built, but instead of two 608-ZZ bearing clamping the rail, this is a single aluminium peace directly screwed to the plate.

The front plate is a peace of metal sheet where both the SBR16 rails and the KF-12 and KB-12 (RM1605 ball bearing screw support blocks) are attached.
The front plate will accommodate the engraving/printing head of the CNC.

Here are a couple shots of the Z-Axis.

I've already made the motor mount support that I will place in my next iteration.
For the paint job, I went for spray paint this time. It is a hole lot better. Easier to apply, thinner layers and more homogeneous coating, and much less time to dry.
I'm actually considering repainting the hole machine, with different colors for the different axis components.

I just wish I had more time to finnish the machine. These lunch hour builds are 50% working and 50% preparing and cleaning up. Efficiency killing...

Building a CNC - Y-Axis - part 4

Finally some progress.
I've been working on the movement transfer interfaces between the CNC arms.
This is the binding element between the X and Y axis.

I've made it with some pieces of rectangular tube aluminium profiles from my previous CNC.

Here are all the elements individually.

X-Y arm interface

The larger holes where made with a circular drill bit.

I've made 4 spacer also with aluminium tube. These spacers will keep the structural shape of the rectangular tube when I tight the nuts that hold it in the ball bearing nuts.

Here are a couple of shots that show the assembly of the X-Y interface piece.