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Stop. Think about that. Then think about it again and again until this crazy idea is banished from your head..!

(Out of morbid curiosity, how were you ever going to make that work..?)

Wal.

I've just jumped into this thread and I would think twice about welding the rails. They will almost certainly bend out of alignment with the heat and shrinkage, even I suspect with TIG which can be...

Definitely they are the most promising ones. I remember spending 2 weeks of my free time / when i had one/ browsing and searching. And thinking of it its not at all so expensive as it could be with...

10 kg Cerrobend £162

http://www.ebay.co.uk/itm/Cerrobend-Woods-Metal-Bismuth-alloy-10KG-/261983313460?hash=item3cff6c1e34

If all you want is to flow a flat surface, why not use Wood's Metal? That goes very runny and sets hard. You could even reflow it if you moved the machine.

I' ve been reading up on EG as my own ideas are taking shape.
As far as I' read, vibrating EG does not work unless you use a mix with too much epoxy for a small size casting. Too much meaning it...

Andy, a wooden CNC will let you learn all about CNC, teach you about how to and how not to build a CNC machine and most of all give you pleasure and enjoyment in making your own things. I'd say do...

I would just like to Apologise for my rant yesterday, things went from bad to worse as the day went on,
I get very frustrated, but I know I should not take it out on people who are only trying to...

Lots of comments made with the best of intentions. It won't be popular, but I'm going to put a different point of view. I built my MDF router to the JGRO design around three years ago. It's a pretty...

Forgot to reply to the general idea...

Here are some thoughts

- Epoxy adheres well to steel but may not stay bonded due to differences in thermal expansion. That would make the steel tub a bit...

Amazing, thanks.

Is it the same for Mig though which is a lot faster, I guess it would be???
I would love to be able to Tig like that ;)

You have got it wrong here. If it was a sheet or just box section profile, yes, its like you say. But not in that case. As it happens that i make various musical instruments and trying to make some...

Always worth trying a bit of lateral thinking on jobs like this .

Why do you need a bed at all ??

If , just for example , work envisaged was routing out shapes from large sheets of plywood a...

But it is instant gratification, square edges, easy to work takes a thread and looks good. Plus working with unfamiliar materials can go wrong very quickly. Better to have a big lump of aluminium to...

There is nothing strange about it.
I live most of the time in Russia. However, in Amsterdam, I have partners. This spring I brought to Amsterdam flexible cable track for use in the automated...

It was like that here before the crysis. Now people search in the bins and sell them on boot sale for prices similar to new, and i am not talking about immigrants like me, i am talking Spanish...

(1)

Designs for any machine beds come in two classes :

(a) Those which are set up in place once only and can remain in place for service life of machine .

(b) Those which have to be more...

HI,

yes i have an update.

First one of the piles of steel at the previous photos now is welding and fabrication table, the other pile with the long pieces now is a shed in front of my garage...

Please read post #165 about my thoughts and price comparison on most available materials

There is no doubt for me UPN140 is the cheapest , strongest, stiffest... It is almost mounted on my...

Log file says: 10289 irving2008 07:14, 4th Jan 2013 Closed Thread Thread: A new life - irving reborn after near fatal accident

Dont know why he would have done that ?

.Me

Hi D.C.

If it helps answer your first questions about the suitability of this design for a cnc router gantry, then my answer would also be yes. Trying to avoid getting to technical:

Although...

Oh look another truss.




I think you should make ends of the diagonal pieces meet, or at least close.



Most of the gantry designs posted on this site are essentially two beams with...

Yes, but overall you're still better off getting 10mm pitch ballscrews since you can use pulleys and have a 1:2 (motor:ballscrew) ratio to get the same resolution as a 5mm pitch screw on 1:1. If you...

I have a book called "the CNC cookbook" which is very simple but a good intro. Available on amazon...