Why is machining on a 3 axis machine called 2.5 axis?
Thanks,
Why is machining on a 3 axis machine called 2.5 axis?
Thanks,
The 2.5D or 2-1/2 axis refers to the common parts where the Z axis plunges into the workpiece and then does not move while the X & Y axes do all the work. By comparision, 3D typically refers to surfacing/mold/die type operations where all three axes move simultaneously.
Most VMCs will move all three axes simultaneously, but the CAD/CAM packages that generate the code differentiate between the types of operation.
Most machine controls do not have 3D capability. The X and Y axis interpolate together and the Z axis moves second. In a true 3D control, X Y and Z are fully interpolated. If you look at the readout in a 3D control, the three numbers are moving simultaneously.
yep - full 3 axis takes massive amounts of calculations and 2.5d is really quite simple.
www.integratedmechanical.ca
my understanding of 2.5 axis machining is that you can only create an arc in 2 planes simultaneously. all the cnc machines i have used can cut x,y and z at the same time. but not arcs on 2 planes at the same time. plus even with a 4th axis, they only move 3 axis at one time.