This is my first BUILD please help.

[JAZZCNC]

Excellent work and that machine certainly won't be walking across the floor.

On the drawings you show the motors connecting to ballscrews directly.! Can just recommend you think about using timing belts and pulleys.
They greatly help reduce resonance which acts upon the motors and can cause rough running and lower performance. On a Box section steel machine this is esp important for obvious reasons and esp if the tubes are not filled with sand or some other form dampening ~(expanding foam isn't much good.!).
You'll also get the benifit of being able to apply a ratio if you ever feel like more speed or need more torque.

I do this on every machine I build regardless of what material it's made from and on every Axis because the benifits far out weigh the cost and extra time.

[DigiSoft]

Excellent work and that machine certainly won't be walking across the floor.

On the drawings you show the motors connecting to ballscrews directly.! Can just recommend you think about using timing belts and pulleys.
They greatly help reduce resonance which acts upon the motors and can cause rough running and lower performance. On a Box section steel machine this is esp important for obvious reasons and esp if the tubes are not filled with sand or some other form dampening ~(expanding foam isn't much good.!).
You'll also get the benifit of being able to apply a ratio if you ever feel like more speed or need more torque.

I do this on every machine I build regardless of what material it's made from and on every Axis because the benifits far out weigh the cost and extra time.

Yes I was thinking that too but can you tell me where can I find 2:1 belt and pulley ?
I don't know how to search them on ebay. Can you help me?

[JAZZCNC]

Very easily found. Often your local bearing stockist will keep them or get them in for you.
Other option is to use someone like these people Timing Pulleys

The belt type you want is HTD 5mm pitch and 15 or 25mm width, personally I use 15mm. Pulley size I use for 2:1 is 18 & 36 or 20/20 for 1:1 ratio. Don't go too small other wise you have less teeth engaged and the belts wear quicker or worse they jump teeth due not enough teeth engaged to handle the torque.
Equally don't go too large else the inertia of the pulleys starts having a negative impact. If you must use larger pulleys then look for aluminium ones.

Pulleys often come with a pilot bore so you'll need to able to bore them or have them bored for you, the compnay in the link I posted will do them for you at a price. Don't go for taper lock as they are heavy plus you won't find them at small sizes anyway but in any case don't for the larger size in them either.

You'll need to calculate the belt size from the centres of each pulley and pitch/no teeth on pulleys, there are lots of calculators on the tinternet.