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Repeat on remaining stringers.

505034

505036

505038

Install brackets on both sides of the upright.

505032

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

504996

504998

The upright profile has a notch at the bottom.

504994

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

504982

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

504978

Install side plates on the stringer.

504976

And the installation jig.

504974

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

504972

All stringers are attached under the pan

504844

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

504842

Inside stringer pushed under the pan.

504840

First stringer is installed.

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

504838

Push stringer with the gauge until it touches the pan.

504828

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

504826

Installing gauge on stringer.

504824

Stringer pushed through.

504822

Installing first outside stringer below the pan.

504820

The pan has six rows of bolts for stringers.

504818

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.

504816

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...

I agree with Vlod.

If the bed is held in place with just four clamps at each corner and has only three cross braces underneath for support, all kinds of sags and distortions of the bed should be...

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I had documented my desktop machine build (David A's Benchtop CNC Version 2) about two years ago which has been running well so far.

Images below show the latest iteration of my X/Z...

What Ger21 is saying is that the direct drive needs to spin the screw at 3000 rpm vs just 1000 rpm for reduction.

How is the direct drive screw rpm lower than the reduction rpm?

Either do as Mactec suggests with the belt reduction or replace the screws/nuts with a slower one, particularly on the Z-axis, which will probably be easier.

Paul,
The 0.005" was with a MDF machine which is known to not be very rigid. I am sure you will be far better off with your new design, particularly with all the new hardware available to builders...

Cutting aluminum......... That's a wide ranging call-out.

Do you want to have 0.005" depth of cut which makes every aluminum part at least a 3-hour undertaking or do you want to be able to have...

Be careful, Peter. The record might not play properly anymore.

Hi Mactec54 - Going off this comment of yours, I went to McMaster's site and all of their struts have a limit of 6 cycles per minute. Would you know if those people are using gas struts on slower...

As a (usually) permanent solution. You will probably damage the aluminum pulley should you ever try to pull the pulley off the shaft.