Home built universal grinder

[albertq]

Albert: Once again I want to thank you for your beautiful presentation and generous sharing of your IP. The http files are easier to orbit than an actual F-360 model! My question is about design intent. Is the timing belt drive on x axis as precise as the ball screw on Y? Or does it even matter since you have fine feed on both axises? What was your thinking in choosing one over the other?
All the best, -Kirk

Hi Saltfever, my rational for the ball screw on the y axis, was because it is critical for cylindrical grinding, as you are feeding on radius like a lathe, whereas on the x-axis it is straight liner feed and my longitudinal tolerance's are mostly larger than my diametric tolerances. The x-axis belt although wide and steel reinforced still has some stretch, so not as accurate as the y-axis. Likewise I have a ball screw on the Z-axis for fine surface grinding height control.