Quote Originally Posted by Boyan Silyavski View Post
IMO its good for max 60x40cm machines. 60x90 machine i wouldnt make fixed gantry
Why Size of the machine as nothing to do with it.!
If you have the extra space it requires then a fixed gantry will always be stiffer than a moving gantry by the simple fact your not having to deal with a moving Mass so can build it stronger with no penalty other than extra length.

Some of the largest CNC machines in the world are Fixed Gantry machines.!