Diy concrete cnc

**XYZ_Spec** · 07-09-2022

Hi all, This is my small build. Base is made of structural concrete and the rest is just some steel box tubing for the gantry and some 20mm aluminum brackets and plates. Nema23 3nm closed loop steppers, ballscrews etc...

Work in progress...

Cheers

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**XYZ_Spec** · 26-09-2022

Hi all,
New part to upgrade the machine and improve rigidity.
Hope this video has a bit more quality.

Cheers

**Lee Roberts** · 28-09-2022

Wow machine looks great

...

...as do the parts your making, what machine did you use to make those? I will sub and watch your videos later :)

**masinecc** · 28-09-2022

Would you like to share the aggregate ingredients, % of all ingredients and the type of resin. I also want to build , i am almost done with the design but i am looking for proper aggregate now. Thanks !

**XYZ_Spec** · 28-09-2022

Originally Posted by Lee Roberts

Wow machine looks great

...

...as do the parts your making, what machine did you use to make those? I will sub and watch your videos later :)

Hi Lee, thanks...
All the parts were made by this machine. It has evolved over the last year... It all started with a 3018 from aliexpress lol

**XYZ_Spec** · 28-09-2022

Originally Posted by masinecc

Would you like to share the aggregate ingredients, % of all ingredients and the type of resin. I also want to build , i am almost done with the design but i am looking for proper aggregate now. Thanks !

Sure... It's not epoxy resin. It's structural concrete with internal steel reinforcements (the same concrete used in bridges, etc).
So far so good.

**masinecc** · 29-09-2022

Originally Posted by XYZ_Spec

Sure... It's not epoxy resin. It's structural concrete with internal steel reinforcements (the same concrete used in bridges, etc).
So far so good.

What min and max sand size ?

**XYZ_Spec** · 29-09-2022

Originally Posted by masinecc

What min and max sand size ?

It's already done for you inside the bags.
Pre-mixed, just have to add water

**Lee Roberts** · 29-09-2022

Originally Posted by XYZ_Spec

Hi Lee, thanks...
All the parts were made by this machine. It has evolved over the last year... It all started with a 3018 from aliexpress lol

Understood, I went on to watch the vids after I posted, looks good :)

Originally Posted by XYZ_Spec

It's already done for you inside the bags.
Pre-mixed, just have to add water

Still what one did you use the finish looks really smooth, any tricks to that ?

**XYZ_Spec** · 29-09-2022

Originally Posted by Lee Roberts

Still what one did you use the finish looks really smooth, any tricks to that ?

The mix is done with fine sand, that's why the finish is not rough. Applied primer, sanded a bit and then painted it. It's not that perfect, but the performance is what matters at the end. :)