Designing DIY CNC Milling Machine

Using a filled epoxy product made for the process, you use a flat reference surface to cast a thin precision mating surface on the underlying imprecise component.  i.e. blubber up epoxy on a steel beam, and press a precision straightedge in to the curing epoxy.  Assuming you applied mold release to the straightedge, your warped, chunky steel beam now has a nice flat surface for a linear rail (or other precision component).

What is an example of an epoxy made for this? I have seen lots of people do this but never found an epoxy that is made for it specifically.

Epoxies from Diamant (DWH, Moglice) for example.

Searching for 'adjustment compound' or similar terms may be productive.  It's hard to know what you're looking for when you don't know the industry jargon (or what something is called in another language).

Belzona sells a product they market as a 'leveling' or shimming compound, but I think it's got different fillers than the Diamant DWH stuff.

tommylight wrote:

Also be warned, cleaning a plasma table is no fun.

 

Nothing truer ever said.  I'd rather clean a toilet.

What result do you want to achieve?

I don't like this slag idea. Loses the main idea of ​​epoxy. Second, epoxy gives off a lot of heat when it hardens. Combined with steel it will not be OK. Why not buy an old cnc machine.? Then you do a retrofit. There are small light machines 1-2T .

Did you know that linear guides have an accuracy class and preload class?
You should choose a bearing with the highest preload when purchasing linear guide! For a ball screw pair, look for old grinders acrew or used ones with replaced balls. Because the screws that are sold class c7 come with clearance...not good for hard milling.

besriworld wrote:

What result do you want to achieve?

(…)
Why not buy an old cnc machine.? Then you do a retrofit. There are small light machines 1-2T .

 

This is purely a hobby project for now. For the rebuild to make sense over what I have right now I’ll need to be able to work with steel very conservatively but reliably.

About retrofitting - for a brief moment I was considering purchasing and CNC-ing even manual mill, but here in Poland mills are prohibitively expensive, especially if it’s not a complete scrap (it’s relatively easy to buy decent lathe, but milling machines are far less popular so these not only cost a lot, but also transport becomes an issue)

besriworld wrote:

I don't like this slag idea. Loses the main idea of ​​epoxy. 

I'll preface my response with the fact that I am really, really not any sort of expert on epoxy granite, concrete, or machine tool design.

Leaving out the issue of epoxy exotherm during deep pours, what's your objection to using slag as a filler?  I thought slag would be about perfect for a filler - stiff, angular, moisture-resisting, and essentially free.

One of the main advantages of epoxy granite is the suppression of vibrations. If it has to be steel, why not make a welded construction ? Because with epoxy you have no guarantee what will happen as a final result . You can check the big construction shop for stones in bags of 25 kg.They should be in different mixes. Or buy a ready mix for epoxy granite from Germany. I don't know if there is a minimum order. There are transport companies for group cargo. Transport is not very expensive.

www.cnczone.com/forums/vertical-mill-lat...cnc-forum-posts.html


Or buy a ready construction Fs3mg or Fs4mg?







one of the best projects
www.cncecke.de/cncforum/forum/index.php?...e-eigenbau/&pageNo=1

Yes, but there is a fundamental problem. It is not clear how he will mix the epoxy with the steel....maybe the end result is not what he expected. On the other side epoxy and stones has already been played and there is information about it.