Quote Originally Posted by Boyan Silyavski View Post
The Z on the picture will extend 200mm with 3kw spindle , but that would seriously question a beginners design. As a precaution the plate should be 20mm steel or 30mm aluminum and reinforced with side braces /against front back deflection/ exactly where the black line is especially at the yellow area. Of course another design problems will arise from such an extension so you have to make sure left/ right you dont have any weeak element on gantry, gantry sides, ball screw mounts, etc.
Boyan you are going Way over the Top with your idea of a Z axis.! . . . You need to read the man requirements.!!
Using 20mm Steel isn't required for cutting Wood and will actually lower the machines performance due to having high inertia and affecting accleration/velocity. Or increase costs by requireing larger motors or Servo's.

The Z axis has drawn will be perfectly fine for cutting Wood even with 3Kw spindle on it.