What's new
What's new
By:
Advanced search…

Calibrating Digital Calipers

F

Flash Gordon

Aluminum
Joined
Jan 29, 2004
Location
Chicago, IL
I have three sets of Mitutoyo digital calipers, a 4", a 6" and a 12".
The 12" seems to be the most accurate and the 4" the least accurate.
The 4" consistently reads .0015 less than the actual dimension.
Is there a way to correct that?
Sorry in advance for the stupid question!
 
If it’s consistently less by .0015” and it’s an absolute model just reset the absolute position to account for it. Yes your zero May be off but then all real measurements will be correct
 
Check the jaw parallelism. Quick and dirty method is to close the jaws and hold it up to the light looking for a gap. The two setscrews on the top are for adjusting parallelism and drag. The front screw is pointed and fits into a hole in the brass gib so it can't fall out.
Look for a bent tip too, not uncommon and easily stoned away.
 
Does not zero right or does not calibrate right?
Tried to set zero on a pin/block rather than just being closed?
Measuring with the tips or inside a tad or a bunch?
What is really funny is those who mix ID and OD zeros and checks and hope for good.
You can not change calibrate, you can change how zero is set.
Making round parts and using nice flat gauge blocks for zero with calipers is another mistake so often done.\
So many will say the gib is loose. Snug it up a bit. This may help bit not real high odds here.
Bob
 
AAHHH where's Gordon B Clarke when you need him.
(For those who have no idea what I'm babbling about, Mr Clarke made a name for himself on this forum several years ago.
He moderated the metrology forum for a time and made a ton of enemies there.
His claim to fame was calipers and thread measuring; he sold a caliper attachment for that purpose)

Cheers

Marcus
Implant Mechanix • Design & Innovation > HOME
Vancouver Wire EDM -- Wire EDM Machining
 
Holescreek said:
Check the jaw parallelism. Quick and dirty method is to close the jaws and hold it up to the light looking for a gap. The two setscrews on the top are for adjusting parallelism and drag. The front screw is pointed and fits into a hole in the brass gib so it can't fall out.
Look for a bent tip too, not uncommon and easily stoned away.
Click to expand...
I have a older mit 196-20 pair that are out of parallel. Touch at the tips and gap toward the head. What direction would I turn the gib screws to correct?
 
You must log in or register to reply here.

Similar threads

E
Master vernier caliper?
Replies
5
Views
258
William Lynn
W
MMC Design
FS: Gaging and measuring equipment
Replies
13
Views
1K
MMC Design
MMC Design
M
Is there a Service for Reconditioning Dial Calipers?
Replies
9
Views
1K
Cyclotronguy
C
S
For Sale Brown & Sharpe Standard Reference Discs No. 657
Replies
4
Views
617
marka12161
M
S
Kalmaster 0-6" Caliper Calibration Tool
Replies
0
Views
662
SteveM
S








 

ABOUT PRACTICAL MACHINIST

With more than 10.6 million unique visitors over the last year, Practical Machinist is the most visited site for metalworking professionals. Practical Machinist is the easiest way to learn new techniques, get answers quickly and discuss common challenges with your peers. Register for the world’s largest manufacturing technology forum for free today to stay in the know.

Learn more about us.

STAY CONNECTED

Facebook Instagram YouTube LinkedIn Pinterest Twitter Tiktok

Register Become a forum member. Register today.

Sign Up Sign up for our e-newsletter.

© 2024 Copyright Practicalmachinist.com. All Rights reserved.

Back
Top