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Digital micrometers with LCD displays usually do not have a power on.off feature. Older units have an "on" button only that is used to turn them back on after a predetermined time-out or period if inactivity to conserve battery capacity but newer Mitutoyo mics cannot be turned off.
yes. Just remove the screw in the lock, lift the lock arm off its shaft, and reposition at different angle. (put to lock, take off without turning, and set back on at unlocked position...may ned adjusting)
You have a nice micrometer! Your problem could be caused too many different things. I would take the lead screw spindle off first and then clean both assemblies. (You can use W-D 40) this will allow you to clean the I.D. I do not know how much you understand how a micrometer works and would caution you not to adjust any of the adjustmants on the micrometer because it could end up out of calibration. I would be happy to take a look at it and free it up and calibrate it for you! I was the Manager and working Supervisor of a precision Tool Room for over 25 years and have quite a selection of parts. I would not want any compensation for the help and I would just ask that you include a prepaid return package. I am retired now and miss the work and I am constantly cleaning all my tools and I could do it then. Here is my e-mail address email@example.com
In order to reset the zero point for your specific micrometer, you will need to have a standard set of pre-set dimensional pin(s). You can check the attached link (page 71 of the Mitotoyo catalog) for the information you need). I guess you could try to find or make a pin with the same dimensions as those noted on the catalog page, but if you're using this in a manufacturing setting, you might have no choice but to purchase a set of gauges for calibrating your micrometer.
Micrometers must be calibrated at 4 spots around the barrel and at zero and full scale to be
truly accurate. You will have to send it to a calibration lab or back
to Starrett for a full calibration because they will check it with gauge blocks of known length and verify the spindle and anvil surface flatness.
If you are only concerned with the zero and not as much about the full
accuracy of the tool, then you can reset the zero yourself. With the
mic fully closed (spindle and anvil touching), turn the barrel with the
funky, half circle shaped wrench that came with the mic in the box.
There is a little hole in the barrel where the nub on the wrench will
fit then you just turn it until it reads zero. Good luck.