Quite an Unusual one

[Boyan Silyavski]

Hi there,
Long time no update. Long story short. Bought new epoxy and did it as I thought it would be right. It worked perfectly. As supposed the long rails sucked from the bridge. I went even further and made only 1 bridge. Yeah, the epoxy leveled without problems. I knew it.
This time I used Knauf channel 0.5mm 3m - 3€ from construction material site. Every attempt I am getting better for cheaper.
Also used 8 mm square bar around the epoxy. The channel was 4 mm wide so the bearings not to hit the bar

some photos. Will upload here also but now I am writing from my phone
https://plus.google.com/app/basic/ph...i%26pgpnum%3D1


Ps. Here are the photos:

[mitchejc]

Wow, those epoxy sides came out very nicely. Also a great idea to use those 8mm square bars on the sides of the epoxy.

That base looks VERY solid and straight. I'm wondering how flat those X sides were before the epoxy, did you perhaps check that? The reason I'm asking is that I'm hoping to get away without having to use epoxy because I'm not getting something similar to the West Systems stuff here so I need a plan B.

[Blackrat]

ive just done my gantry epoxy pour , i gotta say it works a bomb !! am pretty impressed how flat and smooth it has come out

i however used a ATH filler in my epoxy , makes the epoxy much harder

if you phone John at AMT composites in Capetown , and ask him about ampreg21 with the super slow hardner ...

[mitchejc]

thx blackrat, much appreciated.

[feldah]

Hi there,
Long time no update. Long story short. Bought new epoxy and did it as I thought it would be right. It worked perfectly. As supposed the long rails sucked from the bridge. I went even further and made only 1 bridge. Yeah, the epoxy leveled without problems. I knew it.
This time I used Knauf channel 0.5mm 3m - 3€ from construction material site. Every attempt I am getting better for cheaper.
Also used 8 mm square bar around the epoxy. The channel was 4 mm wide so the bearings not to hit the bar

some photos. Will upload here also but now I am writing from my phone
https://plus.google.com/app/basic/ph...i%26pgpnum%3D1


Ps. Here are the photos:

Sorry to pick up that very old thread. But as I am new can't write messages. Could you explain how you did the dam beside the rails. You welded it on. But how did you make sure it's properly sealed so no Epoxy went under it. For the bridge I understood you took a channel from Knauf.

I was considering to upgrade my CNC with epoxy where I drilled the holes already. To prevent the epoxy to float in the holes. I see two options do it as you did and fill all holes with silicone. Or weld a channel over all holes.
Thanks a lot
Felix.

Sent from my MI 6X using Tapatalk

[Neale]

A good way to seal the leaks around a dam before you pour your epoxy is to make up a very small amount of the epoxy and using a small brush or similar just go round the inside of the dam brushing the epoxy into place. it will run into the holes or bridge the smaller holes but because there is not a large quantity behind it, will not run right through and leak out the bottom. You only need to leave it long enough to stop flowing easily before you pour the main epoxy batch - you do not need to leave it for days to fully harden. I made my dam from gaffer tape, stuck to the sides of the rails so that the edge of the tape was above the rails. Biggest problem was peeling it away from the epoxy when the epoxy had hardened. Next time I shall try pulling it away before the epoxy has fully hardened!

I had to strip my first load of epoxy off the rails and start again, but I had already drilled the rails. I put small pieces of Sellotape over the holes and poured the epoxy over the top. I could see where the holes were and then just drilled through the epoxy after it had set. Worked for me!