mitutoyo digimatic micrometer 2293-766-10 instructions

Good afternoon I have been left a mitutoyo digimatic micrometer 293-766-10 it's in need of adjustment I have searched Mitutoyo websites looking for a user guide/ instruction to no avail, does anyone have this type of mic if any chance of a copy of the instructions/ adjustment please.

Cheers H

Harry,

You will hopefully find something useful here: **LINK**

http://www.mitutoyo.eu/en_us/downloads/manuals/micrometers/

If that page won't open, start here:

 http://www.mitutoyo.eu/en_us/downloads/manuals/

and Agree not to copy or distribute, etc.

The Digimatic instructions are pretty brief though.

MichaelG.

Edited By Michael Gilligan on 20/02/2018 15:06:34

Thanks for the links Michael I had already checked them out the one was useful as far as the functions but not adjustment

H

What adjustment are you needing to make, Harry ?

MichaelG.

My Mitutoyo is the 293-605 version which reads to 0.001mm. When replacing the battery, the Zero/ABS and the Preset buttons have to be 'played with' to ensure readings are correct. Press and hold the Zero/ABS until the screen shows all zeros, then the Preset button. The time interval to press-for varies with what you are trying to achieve.

The mechanical correction is carried out first, as others have described, with a small C spanner, then the screen display altered to match.

Pete

Michael the barrel doesn't zero I seem to remember reading somewhere (maybe in a dream) that small adjustments could be carried out with 'C' spanner other adjustment could be made by taking the barrel off and slightly rotating it on the splines !

H

Well, I might be barking up the wrong tree here, but if it is a bog standard Digimatic the origin setting is electronic. If you take out the battery and replace it, the first display after it wakes up shows all zeroes, and a flashing P. Twiddling the thimble doesn't change the display. Set the micrometer to zero (setting block or whatever) and press "Origin". Now the "P" disappears and the display responds to movement of the thimble.

You can do the same without removing the battery by pressing and holding "Origin" for about three seconds. This brings on the flashing P and sets the display to frozen zeros. Pressing origin a second time (briefly) removes the flashing P and sets the micrometer working as a measuring device.

I googled the part number 293 etc but couldn't find a close up enough photo to decide if it was different from the standard digimatic. If this doesn't make sense my apologies for leading you up the garden path. If so Can you up-load a photo of the display and controls we can see what you are playing for?

Best rgds Simon

Simon I have managed to find some info on setting of the function but it needs mechanical adjustment the barrel is not zeroing

H

The thimble sleeve is fitted on a taper, loosen the end cover of the thimble a couple of turns and holding the thimble give it a sharp tap and it should break the taper, you should now be able to reposition the thimble sleeve to your liking and retighten the screw. If you remove the thimble you can access the adjustment for the spindle thread nut.

Mike

The the thimble position is not adjustable along the spindle axis as its position is defined by the taper. It may be possible to adjust the position of the fixed sleeve by carefully twisting and pulling or pushing it.

Mike

Harry,

I've been out this evening, but I see that Mike Poole has explained.

Frankly, I'm a little surprised that a Mitutoyo thimble appears to have 'slipped'.

MichaelG.

Edited By Michael Gilligan on 20/02/2018 22:04:51

Mike thanks for the info, Michael I am now thinking it may have been damaged in some way but I cannot see any 'war wounds' If I close the mic and zero the display it reads fine, I have other micrometres I can use if the battery fail's it's just so much easier

H

It was a standard procedure with older non-electronic mikes to note the zero reading at the user's feel point before taking other readings. Then add (or subtract) this figure from the reading taken. This method avoids the time consuming adjustment which some seem to prefer, including the time taken to find the requisite c-spanner.

One or two of the modern generation seem to have as much difficulty with subtraction as they do with spelling, though.

Cynical, as usual ... Tim

Tim,

Even as an uber cynic ... You must, I hope, appreciate that a dual-reading micrometer [analogue mechanical, plus digital electronic] simply must have its readings 'in-synch'.

Any discrepancy puts the user on the road to madness !!

MichaelG

It´s "über" not uber. Sorry couldn´t resist.

Dick.

Feel free, Dick

MichaelG.

.

P.S. ... You may wish to advise the folks at Oxford

https://en.oxforddictionaries.com/definition/uber-

Edited By Michael Gilligan on 21/02/2018 20:11:25