Stell frame cnc 1500X1000. Adjustable table your opinion please

[ba99297]

Sylyavski i answer your questions to make things clear

The 280mm height is the result of the conevrsations that i had at this thread. They advice me to have minimum distance betwen the outer face of the carriages 250mm. So i make combinations wtih 120X60 and 80X80 tubes to get that height. So two tubes 120X60 at the top and bottom and two 80X80 give me the 280mm

The width of the z axis carriage plate is 370mm. Even if i narrow it as you suggested, i wont get more y axis travel as the spindle plate will conflict with the bottom steel plate ( where x axis carriages will be bolted.

The total weight of the gantry so far is nearly 140 kgr
I will use servos. 4 yaskawa sgmph 400 watt each ( two of them for x axis). 2010 ballscrews for x and y axis, 1605 for Z. 2:1 geat ratio for all axis ( 2 at the ballscrew 1 at the motor. Htd 15 with 5mm pitch aluminum pulleys.

Rails carriages, ballscrews, motors and spindle (2,2 kw) are in my hands. So no change can be made at these components.
If there is any suggestion i will be glad to hear

Vagelis