How to read a depth micrometer

[shopandmath]

How to use a depth micrometer
This is a video I made for my new students
hopefully this will save some time and prevent mistakes in the shop
I know that most of you know how read a depth micrometer
give it a watch and tell me what you think
is there something you would change ?
thank you
Ray
Video URL

[RexB]

Ray, I wonder how you will check for zero when you insert one of the longer rods? You did say something like, "Check for calibration each time you do this" after inserting the 0" to 1" rod. It wasn't clear that you only refer to calibration checks on that rod. Longer rods will protrude varying amounts, and would require quite a set of gage blocks for calibration checks.

[shopandmath]

I am having some problems attaching photos
When you change rods you must check calibration you do this for many reasons (bent rod – dirt or metal shavings inside under rod – dent on bottom of rod – and many more )
To check calibration I use gauge blocks and a known surface
thank you for your response
I don’t think that I can change the video or add or it after its posted

[shopandmath]

I am having some problems attaching photos
To calibrate the depth micrometre
You adjust each rod (this can take some time)
If you are going to adjust a rod size in a vice there is a chance of bending the rod during celebration
Don’t do this with out help from some one who has experience
There are multiple different styles of rod heads
This example has a nut and 3 allen keys
thank you RexB
if this does not answer the question let me know
Ray