big budget cnc

[Boyan Silyavski]

thats a good idea i would have never thought on raising the bed of the cnc

then i will go for a 1600 mm gantry i think this is the best and strongest .

a beam of 160x80x5 mm will not work then?

mayby it best to take your cnc gantry design then.

can u give me advice on witch stepper motors to use?

A beam of 160x80x5mm will work with some minor reinforcing.

Make the drawing and then calculate the weight when you are sure thats the final design. Then come the motors.


I greatly recommend doing a machine similar to mine with the changes that Z is simpler, gantry is the beam you have. Reinforce gantry with some additional 60x60 which will serve you to mount the rails . Most of all leave one gantry side raised like mine and simply eliminate other bed side. Instead the rail is lower than table and gantry side is longer. But you will still have the stiffness from the other side.

Below is a quick mock up of what of am talking about. I am not trying to sell you something here, but if you dont have the time or knowledge i can redesign the already proven design to fit exactly what you need, and by doing so you will avoid many possible mistakes on the way. I will help you here for free also of course, but then you have to design all yourself from scratch. Which is a very satisfying experience, but expect much time in understanding all details of a machine.