That's a great 3-D model Cold Fusion. Kong is correct about doubling up on the bearings. Round-shaft type linear bearings usually have some compliance to make up for less than perfect mounting. That's good under the right circumstances, but makes them nearly useless in your application. Even THK type bearings aren't great for this setup unless they are the extra-long type. Shaft deflection will be insignificant without a rigid linear bearing setup. You'll probably need longer axes to get the travel, no matter how much it hurts... |