NordicCNC's build log

[NordicCnc]

Y-axis design

- 1600mm long, 160x80 (heavy) Item profiles will be used for the sides, onto which the linear rails are mounted. Travel length is approximately 1400mm.
- 1065mm long, 160x80 (heavy) Item profile is used for the front.
- 1065mm long, 80x80 (heavy) Item profiles will be used between the 160x80 side profiles. The base frame profiles are mounted together with front/end plates and 80x80 angles.



- The plates onto which the guide carriages and the ball screw nut housing are mounted are separated from the gantry. The purpose is to allow some adjustment later when squaring the gantry. It will also separate the aligning process of the Y-axis ball screw and linear rail from the gantry squaring process. This will make the aligning easier.
- 20mm HIWIN linear rails with wide guide carriages.
- 2010 ball screws, 1500mm long, with BK15/BF15 bearings.
- Double Delta 400W servo motors with a 2:1 reduction, to limit ball screw RPM. 20T and 40T timing pulley's will be used. Preferably with taper-lock mounting.
- Same servo motor brackets, BK/BF bearing spacers and ball screw nut housing concept are used as in the X-axis. Commonality and re-usability is the goal here.




- The spindle will have a 100mm overhang at when the Y-axis is at the end of the table. The purpose is to be able to mount work pieces vertically, for dovetail machining.



- The table surface I am not sure about yet. Either I will install a HDPE sheet or and MDF spoil board.
- The complete machine will later be mounted to a sturdy metal bench/frame. Adjustable feet will be used.



Originally I intended to have the Y-axis linear rails side mounted, to make the footprint as small as possible and to protect the rails from dust and chips. I was informed that alignment is significally harder with side mounted rails, which is why the rails are now top mounted.