What causes the bending action on a dial indicator?
The bending action occurs as a result of gravity and cannot be totally eliminated in almost all cases of alignment. Numerous attempts have been made by fixture manufacturers to minimize the amount of sag that occurs; however, none have been successful in “eliminating” it for all alignment situations, only in minimizing it.
What are the parts of a dial indicator?
It’s easy to note that there are 2 pointers (long and short) and 2 scales (outer and inner) on the dial. Aside from that, there are some other parts such as crystal, plunger, contact tip, bezel, screw, etc. These parts make the dial indicators look more distinguishable.
Where do I mount a dial test indicator?
Dial Indicators are often mounted using a lug on the back. Dial Test Indicators typically mount via either a dovetail or a small shank that can go into a collet or chuck. I’ve tried a bunch of Dial Test Indicators from Starrett, Interapid and others, and I have to say, the Interapid’s are my favorite.
Which is more accurate dial indicator or dial test indicator?
Interapid Dial Test Indicator, Tenths Accuracy (0.0001″)… Once again, a Dial Indicator measures how far up the plunger moves while the Dial Test Indicator measures how far the tip of a needle moves when deflected sideways. Why use the Dial Test Indicator more often?
Which is the correct way to read a dial indicator?
Spin the outer face until the hand hovers over zero. Your calibration measurements will ensure that the dial indicator does read measurements starting at zero. If you discover errors, you will be able to correct for them by readjusting the outer face so that the hand hovers over the zero point.
What to do when dial indicator makes more than seven revolutions?
If your dial indicator makes more than seven revolutions, check for errors at every revolution after your reach seven. Do not let go of the spindle because you will need to check for errors in the reverse. Begin to reverse your revolutions. Follow the same error-checking procedure, but in reverse.
What should I do if my dial indicator is not working?
If your dial indicator is showing errors, adjust the outer face and clean the spindle. Dust can accumulate on the spindle and cause issues with taking measurements. Repeat the calibration process until there are no errors. Look at the faces on your dial indicator. The hands will move when you press the spindle at the bottom of your gauge.