How to use a sticky pin.

[thehomeengineer]

Hi JR
In the photo the bottom bent piece is a mount for your DTI clock to attach to, the two diameters are standard fitting diameter for the clamps. The middle one is an edge finder for getting in to small places, you need to run the spindle between 600/700rpm and as you bring it into contact with the edge of the work piece it will straighten until running true then as you just go over centre it will flick off. The spindle at this point is half the edge finder away from centre/edge of work piece. Move half the diameter of the finder (small diameter) and you have now set a datum for that edge. I am away this weekend but I will do you a video on using edge finders to clarify this explanation when I get back.
The Home Engineer