Making inaccurate machines accurate.(Practical Ideas)

a certain number of economy-model lathes are notoriously inaccurate. Stick-slip of their dovetail or V-style slides and feedscrew make controlling longitudinal supply with nourishments (carriages) and cross feeds difficult using the available handwheels and vernier scales. I eliminate these shortcomings and achieve repeatable diametric accuracies of 00002 in. and bore deepnesss within 0.001 in. by clamping a dial indicator to the lathe bed and single to its cross slide.

For meeting the lathe-bed indicator's point, I attach a target at a convenient speckle and both the indicator and target are longitudinally