routercnc_MK3

[routercnc]

Few more bits for the upgrade parts.

Left = replaces some wooden parts which held the Z axis stepper motor, plus the Y axis ballscrew nut

Back right = Bracket which connects the new Z plate (20mm aluminium) to the Z ballnut

Front = Bracket which holds the bearing at the lower end of the Z ballscrew. Purpose designed compact unit to limit the amount of Z plate pocketing to retain Z plate stiffness. Machined the bearing pocket with a roughing cut, leaving 0.2mm dia undersize, then finished with full depth cut at final 20mm diameter. Really nice finish. Bearing arrived today (ID6xOD19xdepth6) and is a lovely gentle press fit into the bore. The end of the ballscrew will be turned down to leave a 6mm dia spigot.



As you can see I like to print out some basic drawings with a few key dimensions on as I find this helps overcheck the machining etc. I've also started sketching the outline of the part on the blank with a felt pen to see where it will cut, where to clamp, make sure the machining is occuring roughly where it should be etc. All for now.