The ballscrews themselves are PN XPR6320R48 (powertrac 0631-0200, <.001 in 12") $71.71, these need to have ends machined. The zero backlash nut is SEL10178 $169.48. The parts are bearing and wear plates for various ag machinery, the white are uhmw, the grey are Nylatron GSM and GS materials. The parts have holes, chamfers and pockets tolerance <.008.
The deflection in the x rails comes from the weight of the gantry and 1020 (1x2") extrusion .030+ deflection with 40lb load. K2 should be using 1530 rails on this axis. The y axis will deflect a fair amount also if loaded. If you loook carefully you can see the mic6 plate supporting the melamine cutting surface. That melamine is flat and uniform (+- .002) and makes a great cutting surface, its cheap and sealed from moisture.
The picture is trying to show the four setscrews I put in the spindle mounting plate to both lock the plate and allow tramming adjustment. |