mitutoyo 6" caliper with bad curcuit board

Caliper model is 500-196

On Sun, 18 Dec 2016 23:58:26 -0800 (PST), grbrown6@gmail.com wrote:

>Caliper model is 500-196

<http://www.longislandindicator.com/p189.html>
Scroll down to where the 500-196 section starts.
Early models have few parts available.
The 500-196-20 model has a "reader unit" available but no price.
What's the exact model number?

Plenty available on eBay for little money:
<http://www.ebay.com/sch/i.html?_nkw=Mitutoyo+500-196>
However, I suspect they're all counterfeit.
I was hoping to find the PCB from a wrecked caliper, but nothing
found.  I'll continue digging tomorrow.


-- 
Jeff Liebermann     jeffl@cruzio.com
150 Felker St #D    http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann     AE6KS    831-336-2558

Jeff, Thank you for what you have found so far. The mitutoyo model number 500-196, and that is the full number the 500-196-20 or 30 are the newer ones. I have heard about long island but ii am from Canada and they dont ship here. You have been my best source of any kind for this curcuit board hang up to date. I do appreciate any other light you cn shine on it. Thank you, gordon

On Mon, 19 Dec 2016 10:09:04 -0800 (PST), grbrown6@gmail.com wrote:

>The mitutoyo model number 500-196, and that is the full number 
>the 500-196-20 or 30 are the newer ones. 

There are two series of calipers that lack the -20 or -30 suffice as
differentiated by the serial number.  Is you your serial number above
or below 0214920 ???

Exploded views of the 500 series calipers:
<http://www.mitutoyo.com.br/novosite/lista_pecas/PDF/500.pdf>

Current catalog for calipers:
<http://www.motionusa.com.s3-website-us-east-1.amazonaws.com/mitutoyo/D-Section_US-1002.pdf>

>I have heard about long island but ii am from Canada and they 
>dont ship here.

Drop ship to an accomplis in the USA and have him forward it to you.

>You have been my best source of any kind for this curcuit board 
>hang up to date. I do appreciate any other light you cn shine 
>on it. Thank you, gordon

Y'er welcome, but I haven't been very successful at finding parts or
repairs.  That's probably because the cost of the parts plus labor to
repair your $150 calipers is more than the cost of a new pair.  I was
hoping to find one that could be used for parts, but that's not
happening.

07GZA238 is the part number for Mitutoyo 500-196 with serial number
over 0214920.  I could not find a number for lower serial numbers.  I
suggest you inspect your "reading unit" for a part number to verify
that this is the correct unit:

Googling:
<https://www.google.com/search?q=mitutoyo+09GZA238>
I find several vendors that carry the "reading unit" at about $75.

<https://www.motionusa.com/eCommerceProductDetail?productId=162221&productCategoryId=900120>
<http://www.newark.com/mitutoyo/09gza238/reading-unit-assy/dp/05P0163>

Whether it's worth $75 to fix yours is dubious and risky.  You can get
a new and up to date Mitutoyo caliper for $150, or a pile of battery
killing cheap calipers for about $15.

"How to spot a fake Mitutoyo 500-196-20 caliper"
<https://www.youtube.com/watch?v=GJed9Rsl-8E>
More of the same:
<https://www.youtube.com/watch?v=KnDype-j3hk>
<https://www.youtube.com/watch?v=HpGUOTVBZ3c>
<https://www.youtube.com/watch?v=2xs5mODh-P4>

Personally, I prefer a (cheap) ditital micrometer for <1"
measurements:
<http://www.harborfreight.com/digital-micrometer-68305.html>
<https://www.youtube.com/watch?v=WvszAb0Y0Ec>

Good luck.
-- 
Jeff Liebermann     jeffl@cruzio.com
150 Felker St #D    http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann     AE6KS    831-336-2558

On Tue, 13 Dec 2016 21:27:17 -0800 (PST), grbrown6@gmail.com wrote:

>Ii have a mitutoyo electronic caliper that is now obsolete and the curcuit board seems to be shorted out. Anyone have experience with how to trouble shoot this problem. It used to power up but only read in metric now it just stopped working all together.. the rest of the caliper is perfect condition. Cant just discard it?

There are a few batteries with differing thicknesses used in these
types of calipers. If you use the thickest kind, it can distort the
battery holder terminals and board.

RL

The battery, hmmmm didnt check the thickness compared to the old one. Will check it out, thank you.

Jeff, the serial number sticker on the back was removed by my son and it dissapeared. All I have to even know the model is the original box. Will have to take it apart to try and find the reading unit part number for sure id Fixing this board is proving to be more difficult every day. I have a hard time learning that this is becoming unfixable. I can usually repair most things but this digital caliper board has got the best of me so far. Thank you for the web sites to learn more.

Checkd battery thickness, not any difference there.  

On 12/14/2016 1:57 AM, jurb6006@gmail.com wrote:
> Unfortunately thing like that are like toasters. One IC, surface mount at least, maybe even using the board as a substrate with a glop of epoxy over it. If you can't get the board it is over.
>
> If it has the markings to read it as a regular old time caliper you can use it like that. Or you can use it as a transfer device. Also, if it has the 30 degree cut in the depth gauge it also makes a good tool to measure the diameter of a hole.
>
> What almost amazes me is that these things can tell the position even with the battery out. Mine has a zero button but that is almost not necessary. I cranked it out to like 3" and took the battery out and when I put it back in it remembered where it was. Is this by memory or some sort of measurement technique of which I am not aware ? They talk of capacitance but there is no way that could be accurate at 6".
>
> Mine is an elcheapo, but it does allow for measurement without the battery, and I think most do. And they are cheap so you can just buy another one. I hate to say that but when something is unfixable it is unfixable. You can either get the part or not. You can hound the company, and they might even agree to "fix" it for you but what will happen is they will replace the unit. I work for factory service (not there) and when something cannot be fixed we just offer a replacement at a discounted cost.
>
> I wish we had more control over what the actual manufacturers do but we only bought half the company, what's more all the stuff is made by Apex, this company is just a US front. No more detail on that.
>
> You might find a used one online with bent jaws or something and be able to use the board from that. But there is no ordering "IC 12", replacing it and having it work again.
>
> Nother thing to consider is what these things cost. Mitutoyo is a really good company and I have some of their micrometers and other things, but the fact is they are selling their name if you cannot get parts. So for, I think $16, Harbor Freight or one of them has one that is so similar in performance you'll never notice any difference.
>
> Or just read a real caliper that has the scale on the side that gives you thousandths and forget about this digital shit and you will never have this problem again.
>
> On this page the first picture shows a caliper that can read down to the thousandths :
>
> http://www.instructables.com/id/How-to-read-a-vernier-caliper/step2/Course-reading-1/
>
> Forget the text. The top of the picture shows a different scale which is made specifically to reveal the next decimal place. Whichever line lines up with a line on the main scale indicates the next decimal place. They achieve that by using nine lines in the exact space of ten. It does not matter which line lines up with the main scale, just count it up and it is the next decimal place.
>
> I know this is hard to understand for modern people, but give it a try. The battery died in my digital caliper about two years ago and I never bothered to replace it. Plus I got better calipers laying around anyway. They just aren't digital and you have to really look at them to read them, it is not all done for you. I also have a pretty full set of micrometers, none digital.
>
> These conveniences are nice but make us lazy.

What is wrong with dial calipers?  I have a digital caliper, but I have 
to take the battery out each time I'm done with it or it dies.  I used 
to think the case was pressing the on button, but eventually I realize 
the durn thing just never turns off!  So I use my dial caliper which got 
dropped once and reads 1 or 2 thou when closed.  Not a problem for most 
of my work.

The dial caliper came with a micrometer which I used the other day to 
measure the thickness of some Chinese 18 gauge wire which is really more 
like 20 gauge.  I didn't contact the ebay seller early enough so they 
won't refund the money.  So I'm going to buy more of the same and then 
give him shit.  Do they *really* have to cut corners so much that they 
aren't even selling what they claim?

-- 

Rick C

On 12/21/2016 11:48 AM, rickman wrote:


> What is wrong with dial calipers?


Absolutely nothing. He was looking for advice for the problem he has at 
hand.