Ross77
20-05-2013, 12:34 AM
Evening all. Heres my take on an easy to build and strong Z axis/carriage design when using supported rail.
Y axis beam is only a starting point and the ball screw is probably not in the optimum place but the main design points are:
Distance from Y axis rail to cutter centre minimised (130mm with 80mm spindle) to reduce torsion on y axis bearings from cutting force and weight of Z carriage
Simple design with minimum parts and therefore deflection.
Z axis motor mounted on Y carriage
Lower bearings wider spacing to increase rigidity and reduce racking on ballscrew (bearings travel through gantry sides so y axis can be kept short.
8960896189628963
This is only a Concept design for bearing and rail orientation - final dims and size to suit cutting application
Z axis
16mm rails
100mm travel
80mm spindle (eg water cooled from ebay)
Y axis
20mm rails
Y axis beam is only a starting point and the ball screw is probably not in the optimum place but the main design points are:
Distance from Y axis rail to cutter centre minimised (130mm with 80mm spindle) to reduce torsion on y axis bearings from cutting force and weight of Z carriage
Simple design with minimum parts and therefore deflection.
Z axis motor mounted on Y carriage
Lower bearings wider spacing to increase rigidity and reduce racking on ballscrew (bearings travel through gantry sides so y axis can be kept short.
8960896189628963
This is only a Concept design for bearing and rail orientation - final dims and size to suit cutting application
Z axis
16mm rails
100mm travel
80mm spindle (eg water cooled from ebay)
Y axis
20mm rails