Coaxial Centering Indicator Use

[barnesrickw]

when using a coaxial centering indicator on a mill, do you need to use a spindle lock?

 

[canadianhorsepower]

when using a coaxial centering indicator on a mill, do you need to use a spindle lock?

no your spindle have to rotate


[ame]https://www.youtube.com/watch?v=kETFbWFvoq8[/ame]

cheers

 

[barnesrickw]

Thanks, that looks almost too easy. Time for a purchase.

 

[Gordon]

I have never used mine with the mill running. I just turn the spindle by hand. when it is rotating like that how do you tell which direction to adjust it? X or Y?

The biggest problem is the amount of head room required.

 

[canadianhorsepower]

Thanks, that looks almost too easy. Time for a purchase.

LOVE mine Thm:Thm:Thm:

 

[canadianhorsepower]

I have never used mine with the mill running. I just turn the spindle by hand. when it is rotating like that how do you tell which direction to adjust it? X or Y?

The biggest problem is the amount of head room required.

he does push it with RPM but you turn one handle no effect or it increasse
change Handel
it only take 4 inch

 

[kvom]

I have never used mine with the mill running. I just turn the spindle by hand. when it is rotating like that how do you tell which direction to adjust it? X or Y?

I run the spindle at about 200 rpm. Move one axis until needle movement seems to be at the minimum, then the other the same. If the movement increases go the other direction.

 

[Cogsy]

I have never used mine with the mill running. I just turn the spindle by hand. when it is rotating like that how do you tell which direction to adjust it? X or Y?

I run mine slow, about 95 rpm I think. I roughly centre it by eye then switch on and watch the needle sweep, then slowly crank one of the handles. If the sweep reduces I keep going til it starts to increase again then switch to the other one and repeat. In less than a minute I can have a round piece indicated to better than 0.01mm (0.4 thou). If I had to rotate by hand I'd stop way before I got that close.