How to test your ball screw? How straight is it?

We use a dial indicator to test how bent (or not) a pair of C5 TBI Motion ball screws are. They are 32mm dia. 20mm pitch, 2450mm long, and were supplied by Fred from BST Automation in China. The ballnuts are the FSH type, that have internal recirculation, initiated from caps at the ends. These are supposed to support higher rotational speeds than the types a showed you in the previous video, that used diverters.

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