The spacings are larger just to make it easier to read and make more room for the numbers 0 … 10 on the Vernier scale. The marks on the Vernier scale correspond to 0.00, 0.05, 0.10 … 1.00 mm. For example, when the mark labeled "2" lines up with a tick mark on the main scale, you add 0.20mm to the main scale reading.
Micrometer calipers measure thickness. Vernier calipers can measure both thickness and inside diameter. For the same least count and accuracy, both are similarly priced. Do micrometers have any adv...
I have a digital caliper, my son looked at it and said I would get more accuracy with a steel ruler. What is the make of it? Does it read to 3 decimal places? Does it come with a calibration certificate? has it ever been sent for calibration?
And use them to transfer the measurement you your vernier calipers using the external jaws on the back You will lose a bit of accuracy in the transfer but not that much. Some skill is required to use jaw calipers as you need to feel for the actual diameter by rocking them and adjusting untill you just feel very light touch.
3 I'm trying to clarify my understanding about the requirements [read: best practices] for measurement resolution and measurement confidence. The "Rule of 10s" is a commonly tossed around guideline for measurement resolution that, to the best of my understanding and searching, suggests the following:
If you need better precision that your ruler subdivision (i.e. if you want to measure the 0.1) and you don't have a caliper then a work-around is the following: place your ruler next to the object, take a picture as perpendicular as possible blow up the image (resize/resample) measure how many pixels correspond to a full mm. (lets say a)
It says it's is for woodworking, but the vernier is marked into 2' segments. That seems a little too accurate for wood, and of course the description could very well be wrong. I could envisage this in a machinist's shop. And the associated photos suggest an engineering use, not carpentry. So what's it do and how could it be used..?
I need to know the difference between a direct and indirect reading instrument. Would a caliper be a direct and a gauge block be indirect? Is a direct instrument something with a variable measureme...
A single-pivot side-pull caliper brakes is composed of the following elements, pictured below: brake line brake line housing (aka noodle) brake line puller (ie, a handle) left caliper (green) attached to pivot point right caliper (red) attached to pivot point spring, which pushes the calipers apart wheel/tire
On a side note, in the lower picture those horizontal lines on the barrel behind the linear scale are used to get even higher precision through the Vernier effect. You have to check for the line which is most closely matched to the horizontal lines on the rotating part.
