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All stringers are attached under the pan

504844

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

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Inside stringer pushed under the pan.

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First stringer is installed.

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

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Push stringer with the gauge until it touches the pan.

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

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Installing gauge on stringer.

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Stringer pushed through.

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Installing first outside stringer below the pan.

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The pan has six rows of bolts for stringers.

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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.

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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.

Interesting thought....

Once you get to that point, I could order for you whatever you need and send the package to you. I am in California and have no idea if that could save you some money. I could use the carrier...

Thanks, Peter .......... was meant to be a tongue in cheek comment.

Do you use any weight compensation for the z-axis like springs or gas struts?

Man, Brevis, Brevis-HD, YaG, Scoot, Brevis#1, Scoot S2, Scoot/Yag, Scoot S1........... quite some lyrics here :confused:

That looks like total overkill. SDP/SI has single piece clamp collar pulleys which work very well, do not damage the shaft and cost only a little more than set screw pulleys. I have them on all of my...

I never liked auto gantry squaring because you home first and then you force the gantry to go back on only one side for the auto square function. Distortion of the gantry, however small; uneven load...

Hi Jayne, as Peter explained with threading the stepper holes.

Hi Jayne,

In the inboard case, make sure they are either attached to a thick plate and/or you have a fan inside the profile for heat management as they get quite hot. You also should think about...