[davida1234]

Hello everybody,

This is my build thread for a desktop CNC. It features rotating ball nut drives throughout and is designed to incorporate coolant and vacuum cutting.

Mechanical design goal was to maximize planar loads, thus I am calling it PLANAR.

Enjoy.

[davida1234]

Starting point is the pan with a T-slot table.
It is watertight and can hold about two gallons of coolant and has vacuum channels built-in.

[davida1234]

The pan has six rows of bolts for stringers.

[davida1234]

Installing first outside stringer below the pan.

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Stringer pushed through.

[davida1234]

Installing gauge on stringer.

[davida1234]

Line up gauge with the end of stringer and tighten down.

[davida1234]

Push stringer with the gauge until it touches the pan.

Attachment 504828

[davida1234]

First stringer is installed.

To install stringers under the table, loosen one row of bolts with the T-nuts.

Attachment 504838

[davida1234]

Inside stringer pushed under the pan.

[davida1234]

Again, use gauge to push the stringer into correct location and tighten back the bolts.

[davida1234]

All stringers are attached under the pan

[davida1234]

Next up are the uprights. A pair of side plates and one upright profile.

Attachment 504972

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And the installation jig.

[davida1234]

Install side plates on the stringer.

[davida1234]

Push the jig under the side plates until it touches the stringer.

Attachment 504978

[davida1234]

Jig brings the side plates to the same height and aligns them with the front face of the stringer.

[davida1234]

The upright profile has a notch at the bottom.

[davida1234]

Slide the profile down between the side plates with the notch facing toward the pan.
(Front side plate omitted for clarification.)

Attachment 504996

Attachment 504998

[davida1234]

Install brackets on both sides of the upright.