Hey /diy/. I need help designing a device that can measure offset in thousandths of an inch on a moving steel pipe. What I have so far, suggestions for improvement.
Try using a dial indicator first, that may work.
Visit this forum:
http://www.practicalmachinist.com/vb/metrology/
Thickness and diameter of steel will be a factor.
I would suggest solid invar if you want tolerances below 10 thousandths
otherwise temperature is going to have a major effect