Stell frame cnc 1500X1000. Adjustable table your opinion please

[Boyan Silyavski]

wait a second!

I am going to explode from epoxy knowledge these last days

I am right here where you are with my next build . I need epoxy also, so i have done some additional research, locally, i mean. $$$$ i mean versus West System


1. How many L or KG of mix you will need, add 30% at least, for errors or mistake in calculation.

The channel for 20mm rail must be 40mm wide and 5mm thick

Yesteday i read a lot of epoxy material and it seems that the minimum thickness must be 3mm at least -otherwise the forces will not spread. So what we do here at the forum 5mm is ok.

2. lets see what compression strength epoxy we really need.

Heavy duty build, like mine or yours.
2x90mm Hiwin each side, separated at least 90mm each +50mm force spread approximately each side, that 20mm wide= ((2x90+90+2x50)x20)2=14.800 mm2= 148cm2

12800psi to kg/cm2=843kg/cm2 , so we have 148cm2 x 843kg/cm2==124 764 kg . safety factor 125 tons :3= 40 ton gantry , It seems enough, yes?


2. I am at the point of buying epoxy

I found 8kg pack of Spanish epoxy that seems to fit the purpose for 140euro. I need half only. it has only 120kg per cm2 resistance, but even that is more than enough. I can spit it in half if enough for you and ship it to Greece via UPS for 20eur. I spoke personally with the guy that makes the epoxy and he told me it will be perfect for the purpose

I am waiting to speak tomorrow with another company which has very similar epoxy to WS, and slightly cheaper per kg if to buy small packs.

or i could buy more 209 hardener from UK, together with all i need for my build and ship it to you. i can ship up to 30kg for 20eur to you.

So don't waste time with the epoxy, calculate what you need and i will help you.

3. gell time is when the poxy becomes unworkable. Pot life is the same but only if you keep the mix in the pot, where it hardens faster than if spread on the rails. Thats why the confusion. the more epoxy you keep in one pot, the faster it hardens, hence they must state how many g or kg when saying gel time or pot life.