Setting Zero on Mitutoyo digital micometer

[EmgeeParticipant @emgee]

Help please to reset a Mitutoyo 25mm digital mic. After replacing the battery all my attempts have failed to remove the flashing P (print) from the display.

Fitted a new battery, closed anvil to stop, pressed Origin once, pressed Origin for a second time. P still flashing.

If Origin button held down after about 8 seconds an E–o3 message is displayed. The same message is displayed if the Zero/ABS button is pressed.

I do not have original instructions but have followed procedure as described on the Mitutoyo site.

Any help appreciated. Emgee

[EmgeeParticipant @emgee]

Setting Zero Mitutoyo 293-795-30 0-25mm digital micometer

[Michael GilliganParticipant @michaelgilligan61133]

Maybe you have seen this page already, but here's a good collection of manuals from Mitutoyo:

**LINK**

https://www.mitutoyo.co.jp/eng/support/service/manual/001.html

MichaelG.

[EmgeeParticipant @emgee]

Yes Michael, got details as in my request from there but Search for the model number 293-795-30 gives nothing.

Emgee

[Michael GilliganParticipant @michaelgilligan61133]

Sorry … I failed to notice the model number in your thread sub-title.

MichaelG.

[Brian Sweeting 2Participant @briansweeting2]

You say that you have closed the mic, should you not be using the calibration block to set the origin?

[SillyOldDufferModerator @sillyoldduffer]

I've got a height gauge that has a nervous breakdown every time I change the battery.

I think it's because the gauge remembers previous settings for several minutes whilst the cell is being swapped over. If the volts are already too low when the change is made, the memory is garbled. That causes chaos when the gauge powers up on the new cell. For me the cure is to wait about 20 minutes after taking the old cell out before putting the new one in. I guess letting the gauge discharge completely before putting in a new battery forces a full reset, restoring sensible factory defaults.

May not solve your problem but easy enough to try.

Dave

[Simon Williams 3Participant @simonwilliams3]

If I remember right, the P isn’t print it’s to indicate that the origin has been lost. Remove battery, leave for a few minutes. Replace battery, display shows zero’s and flashing P. Display shows zeros even if you move the thimble. Close anvil and spindle for true zero. Press origin (from memory, check instruction). Now flashing P is off, and display responds to thimble position.

If not it’s sicky poorly

[Phil super7Participant @philsuper7]

When the "p" is flashing press the Origin Button once do not hold

Phil

[Raymond AndersonParticipant @raymondanderson34407]

Looked all through the Mit catalogue and 293 is certainly part of the product family but the range does not appear to go up as far as the next 3 numbers ie 795. Do you have the numbers correct ? as it is easy to err on that. [ I've been there ] Also is it one of the "Digimatic " ones. as not all the Digital models are "Digimatic "

[Raymond AndersonParticipant @raymondanderson34407]

Just removed the battery from one of me Mit's [ 293331] once I set the origin the P will flash and as Phil mentioned press it [ Origin ] again and it will [ should ] vanish. Not sure about the E–03 code, Possibly a faulty battery.

Just tried putting in the number of my mit 25-50mm Digimatic [ 293331] and even it comes up with "no results " so it is obviously not a current model, looks like the same for Emgee's one.

[Neil WyattModerator @neilwyatt]

One way to clear the confused memory of a caliper or micrometer is to briefly short the battery terminals, this is enough to discharge the on board capacitance and clear the memory.

Neil

[Michael GilliganParticipant @michaelgilligan61133]

At the risk of embarassing myself further:

This may help: **LINK**

https://www.mitutoyo.co.jp/eng/support/service/manual/pdf/99MAB025M4.pdf

MichaelG.

.

P.S. … The part number looks valid, albeit 'discontinued'

http://uk.rs-online.com/web/p/micrometers/0431426/

Edited By Michael Gilligan on 08/09/2017 18:05:20

[Nick_GParticipant @nick_g]

Posted by Neil Wyatt on 08/09/2017 17:59:07:

is to briefly short the battery terminals,

Neil

.

When the battery has been removed of course.

Nick

[EmgeeParticipant @emgee]

Thanks for all the tips, will try them one by one tomorrow, probably starting with shorting the battery compartment terminals out to discharge any voltage present.

Emgee

[EmgeeParticipant @emgee]

Still no change, the Origin button now toggles the display between P flashing and the E–o5 mesage. (Not 03 as stated incorrectly earlier unless the fault has changed)

At rest and at frequent intervals the display momentarily shows 666.000 and not 0.000. (mm mode selected)

Does anyone know or have used an instrument repairer with a good outcome ?

Emgee

[jimmy bParticipant @jimmyb]

E-05 makes more sense!

I dropped a Mitutoyo QuantuMike at work and got the same error. Tried all sorts of things, in the end the inspector had to strip it down. Turns out the encoder had shifted.

Jim

[Simon Williams 3Participant @simonwilliams3]

Just before you give up and start taking things to bits, I’ve seen the E-05 message cured by fitting a new battery. It’s worth trying a new new battery

[Raymond AndersonParticipant @raymondanderson34407]

Error code E-05 is an overspeed error for Digimatic calipers The overspeed/ electrical noise error code for Digimatic mic's is E-oS.. Certainly would try a known good battery. Failing that, a call to Mitutoyo would be in order. I certainly would not attempt to take any of mine to pieces.

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Emgee on 09/09/2017 11:03:34:

At rest and at frequent intervals the display momentarily shows 666.000 and not 0.000. (mm mode selected)

.

You may need the services of an Exorcist

MichaelG.

.

But seriously: Post #6 on this thread refers:

 http://www.practicalmachinist.com/vb/metrology/help-mitutoyo-electronic-digital-micrometer-200909/

Edited By Michael Gilligan on 09/09/2017 13:59:45

[EmgeeParticipant @emgee]

Hi Michael, thanks for the link, interesting reading but no access to the pictures, really sounds like it is past the use date unless an instrument repairer can be found. In the meantime back to the conventional mic !!!

Emgee

[Nick HulmeParticipant @nickhulme30114]

If you're fairly handy don't be afraid to have a look inside, my 0-25 Mitutoyo dicital mic gave the same error and some judicious fettling got it up and running, it's still my best micrometer,

– Nick

[EmgeeParticipant @emgee]

Hi Nick, to dismantle will no doubt be a last resort thing for me if all else fails.

Now found that if the anvils are left open by a small amount (0.50mm) and the Origin is pressed the P stops flashing and the display is stable 0.000mm.

The mic can now be opened to it's full extent and the display changes as in normal working mode recording the distance opened.

As soon as I turn the spindle to return the mic to closed the display indicates the E–o5 mesage, pressing the Origin button now resets to 0.000 with flashing P and pressing Origin again stops P flashing and display is 0.000.

Any more ideas on the fault ?

Emgee

[Ken NadenParticipant @kennaden82234]

Hi Guys

Have same overspeed error E-05 when insert battery in Mitutoyo 293-601 digital micrometer. Tried preset held down through reset cycle and the when flashing p back releasing button and immediately giving the button a quick press. This was all done with mic jaws closed at 0 on barrell. But still reverts to E-05 after a very brief display of 0.000 mm that increments quicly with negative sign up to – 0.221.

So moved barrell well put to 10mm gsp between micrometer jas and repeared the hold preset down for more than 8 seconds until all 000.000 cycled and flashing p input seen and release of button flowing by a quuvk press gave s sustained 0.000mm with no E-05. Moved micrometer barrrl out and mic behaved as normal incrementing the display inline with the barrel rotation marks. So you would think all wells good after a preset at 10mm jar gAP but not really

The turning of the barrel back in so the micrometer jaws close worked to a point of 10mm jar gap then around negative -0.220 the display wentry to E'05 so a fresh hold had been reached.

Just want to know if othere mitutoto users have ecirencester the same snd if they fix it. Think this mic needs to have its contacts cleaned or reset which I believe is some sort of ring on the barrel with 3 initial screws no 21 followed by some inner no 16 setting of contact ring screws.

Any helpnot this piggy back post please

Ken

[old martParticipant @oldmart]

The flashing P is "preset" , you have to set the zero, or the start length if the mic is 25-50 or bigger. I sold the three I had bought back in 1990, so I don't have the instructions any more to help.

[Author]

Posts