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I'm working on a gripper design that can pick up a paintbrush.
good points. if i understand you correctly, i think i might be able to mitigate the axis (center point?) of the brush changing with different brush sizes as long as every brush has an identically-sized collar and that the brush is centered in the collar? in other words, embed and center the brush handles in 1" diameter cylinders, then pickup the cylinders with the gripper. if i calibrate home with one the centers of all should line up. i can keep track of the varied brush diameters in software.
How much space do you have between each brush in the CNC rack? ie, how fat can the robot fingers be?