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Good idea mark! For a long time I thought I had built mine too big. 90% of the time I’m cutting stuff no bigger than A3


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Looks a lot like my Z axis but I have BK12/BF12 fittings

23883

Cost me ~£100 to build but I recovered the Hiwin's.

It's using rotating ballnuts which are fastened to gantry sides.
Could if you wanted use conventional ball screw setup but the end brackets would need changing and you'd fasten the ballscrews to...

No not made one using this technique because I've got large Granite surface table so use different methods to get surfaces on the same plane. Mainly to save costs because the profile is expensive...

Nice machine Dean - have you made one before ? :)

Out of interest do the profile rails down the side also bolt horizontally into the steel sections or just on the support brackets?
Would the...

Here's design that will allow you to be more flexible with the frame. Although the base here is in one piece it could easily be made in 2 or 3 pieces and bolted together.
The important part is the...

Gantry is HD Item section 120 x 80.
Frame is 100x100x6

When all is short , it looks very sturdy. In 3m length even the 100x100 box section feels like makaroni. If steel, i would say gantry will have to be minimum 100x200x3 beam at the very least. So for...

Well all can say is build it stronger or should say Stiffer. If your limited with logistics then build it sections so can be easily moved. It will add another level of complexity because still need...

Don't get hung up on Mach3 it's actually very simple in use and there's not a lot to learn to actually use the machine.

The main issues people have is actually setting up mach3 to work with...

yes I built a torsion box from mdf, stupid idea, my idea was to pivot the machine against the wall when not in use, terrible idea so I plan a new table, mix of steel and aluminium, I was thinking if...

If you was building a plasma machine I'd say that's perfect. But if you want a serious router then it needs lot more work.

The Bottom Pic looks very much like Merchant Dice machine and just ask...

Hi Malcolm, As you have probably gathered by now the Ends will need machining to fit the Fixed type bearing. However, this alone won't make a massive difference it's the screw speed that is Key.

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https://uploads.tapatalk-cdn.com/20180301/3230ef073a36ac4769ba1bd97478d100.jpghttps://uploads.tapatalk-cdn.com/20180301/c14ad3f3e328de579eb4221c99eb38a7.jpghttps://uploads.tapatalk-cdn.com/20180301/1f...

Yes it is I have personally seen it. Why not ask him for a quote? He is not to far from you.

Hi Mark
I’ve just finished building an 8x4 CNC. It works ok, https://uploads.tapatalk-cdn.com/20180227/1e31c716f6491083411b39ea039e449c.jpg
I fitted it with 25mm ball screws on x and y axis and...

Yes your wrong.!!
Don't under estimate wood because while it's softer than aluminium you have to cut it faster and often much deeper which requires strength/power.
Also don't just think strength...

Hi Mark,

Ok first off let me say straight away that Clive is correct with 3K you cannot build the machine you describe or one that is any good.

When you get into 8x4 or above the game changes...

With this budget you would be lucky to build a machine half the size you are after. I would suggest that you put some of your design idears up for other to critique. Also I would advise not to buy...

Hi Mark,

There are a few machines here, all self built. But they are not as large as you are planning:
http://www.mycncuk.com/threads/10066-Finished-builds-picture-menu

When the machine is...

Not much as you probably think if got from China. If done correctly no support system is required and no whip will occur.
If wanting really high rapid feed rates then does start falling in R&P favor...