Long time lurker but seldom post. I'm building a slightly modified version of the JPGO router. X and Z axis are pretty much complete and I'm now ready to build the gantry and start putting everything together. My question concerns how high to build the gantry. I have a little more than 6 inches of Z travel. I am thinking that the gantry height should allow for a 1" long cutting bit to travel 1/2" below my cutting table height. (that's my own best estimate). That would give me approximately 5 1/2" upward travel of the Z axis.
Is that close, or is there something else I need to allow for, such as limit switches, etc???
Thanks for any assistance!!