Steel framed fixed gantry draw slide build super cheap

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please show me one youtube video of a fixed gantry draw slide build made of steel please, you wont find one !!!

That's just three, but there were many in my list when I made a search just by entering "CNC drawer slides" in the search text box. Perhaps I am just lucky, I don't know, but if I say this is not new and not an innovative idea at all, or that there are plenty YT video examples I mean it. As you can see, more than one of those three links are about 5 years old links.

The only reason I commented your build was that you seem to have spent time in making a rigid frame, which is very good, and then weld the drawer slides on that frame, which in my opinion is not a good idea at all, since even if you have some exceptionally well made slides with zero play, you will not be able to square your machine properly.

BTW, I seriously doubt you will achieve 1 micron over 12" and can repeat that over and over again. Perhaps you meant 1 thou (0.0254mm), which if you lucky, you might be able to achieve and if you get that you can count yourself really lucky. More likely, you will get 1mm accuracy or even worse, especially over some time of use, when things start to wear out. I think that 1 micron (0.001mm) is a dream for any home made CNC, even more so for one which is welded at home using drawer slides and lead screws hanging on the motor without properly fixed bearings and curtain rods with delrin slides as Z. I know you won't believe me, but like Jazz said, you are not the only one reading this post, so it is important to point out some facts. Even measuring at that accuracy accurately requires better instruments than most DIY CNC builder can ever dream of. I have 0.02mm (20 microns, worst case) on my machine and I think that is excellent, considering the materials I have used and is definitely more than enough for my needs. But of course, I would not say no to 1 micron... if I could make that for a reasonable cost and in reasonable time (maybe when I retire in a few years time). Having that accuracy on each component is one thing, but once everything is assembled and you start to square... well, that's a completely different thing all together.

Again, that's just my experience and don't let me discourage you, but others who consider making something similar and expecting getting 1 micron accuracy should know that it will be a real challenge with those parts.

Edit:

One link was pasted twice, so only three links are unique so I removed one of the four.