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Wests system https://www.westsystem.com/the-105-system/epoxy-resins-hardeners/

No I did it on the fly to keep my old brain active but if you want a laugh see this https://photos.app.goo.gl/aNJ4dyT46fmWJ2Jy8

Hi John, My order arrived last week. A month late!!!!!!!!!!!! I have 3 pcs of spare 8 to 12 mm couplers. PM me your details and I will pop them in the post if you still need them.

My motors and...

[QUOTE]I treated it once with a PVC based sealer and water and this has cut this down. I will aim to treat it once more before moving on with the block work next week. This should also help ease my...

No problem John,

They are still on the way for me. Currently in Germany so I would expect them at some stage next week. Looks like I am going to be waiting for my new motors and drives a while...

Hey John,

I have 3No 8mm to 12mm couplers on the way. They should be with me in the next few days. I have no need for them as they were part of a package deal. I have upgraded my motors to Nema...

That's a really interesting base design, I've been wondering about a concrete or block base myself in the future as a cost-effective and very rigid structure. I'll be interested to follow your...

Good stuff John. I would have never thought of a concrete base but now that I see you mock up it makes perfect sense. It will also be much easier to surround the upper part of the walls with a...

I totally agree about the rails. Mine came from a salvaged Bisse industrial cnc router. Top quality parts. Budget usually decides @ 3 meters long! I'm going to try and sell my 50W 600x500 laser...

Mig is more than capable of welding that material, but 100A isn't. It would need 250-300A and thick wire. The trick with Mig is setting the wire feed correctly.

Also when your butting 2 pieces...

Hi John, It's looks great. In relation to the resonance you are experiencing in the Y axis are you running the machine with the Y axis unmounted to a surface or base? Do you only experience this when...

I'd be very happy with that as a first welding attempt - nice one! But yeah MIG isn't going to be best for that material size - I'd be surprised if it has enough penetration.

What's the phrase?...

I would look to beef up and brace the gantry ends but other than that it's nice and stiff looking.

That Z-axis is spot on for the size and you have half-decent material size. You won't get a much...

Welding isn't that hard, esp if you can get your hands on a Mig welder. You can even hire them from some a decent hire shops.
The welds don't need to be industrial strength. Steel is very forgiving...

You're the man then! I like the idea of bendy concrete made with old tyres :excitement:

That would probably be this 8x4 then. 10 x 5 with a Vacuum bed will be coming soon if I ever get out of this bloody house again.!!.

The vertical machine works amazingly for large machines with no...

Hi John
Regarding vertical mounting you will have to build yourself a substantial base, if you make another post asking for ideas for designing a vertical assembly machine Dean(JAZZCNC) might give...

yes., assuming BOB xn(GND) and 5v GND are connected (I'd be surprised if they're not)

Your first picture, yes... I'd try that first before making an intermediate driver.. or change the BOB for one with better output drivers...
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And don't connect motor supply and BOB supply grounds...

I just edited my post having re-read the datasheets. The leadshine 16mA is a max value when using > 5v sources, used to calculate the additional external resistor, its not relevant here. On a true...