INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Member Login

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips now!

Talk With Other Members
Be Notified Of Responses
To Your Posts
Keyword Search
One-Click Access To Your
Favorite Forums
Automated Signatures
On Your Posts
Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

LINK TO THIS FORUM!

Eng-Tips LinkedIn^® Group

Join our
LinkedIn^® Group!

Hook up with past and present colleagues and classmates quickly.

Partner With Us!

"Best Of Breed" Forums Add Stickiness To Your Site

(Download This Button Today!)

Feedback

"...This site is like first coffee in the winter morning..."

More...

Geography

Where in the world do Eng-Tips members come from?

Click Here To Find Out!

Eng-Tips Shirts!

Get your
Eng-Tips Forums
SWAG here!

Home > Forums > Industrial / Manufacturing Engineers > Activities > Machines & Machining engineering Forum

measuring a radius

Read More Threads Like This One

Junid (Mechanical)

30 Mar 11 8:05

Hi,
I have to measure the radius of a needle.
I attached a drawing of needle, where you can see that the dimension of the needle radius is R=0.2032 ± 0.0025 (0.008"±0.0001").
Today we use a "Conefocal" microscope (the system bolong to another company, and very expensive, price of 60,000 $)
We want to buy cheap system which have the same measuring precision.
"Conefocal" precision at zoom of X 100: Z axis=10 nm ; X,Y axis=120nm
The measuring area on the radius on X,Y axis, is 0.12mmX0.12mm
thanks

btrueblood (Mechanical)

30 Mar 11 10:40

Optical comparator, toolmaker's microscope...

unclesyd (Materials)

31 Mar 11 7:45

In addition to the above here is another approach to measurement.
Look at the VZM 200 or 3D CX-3000. Here is a link to Caltex Scientific. Take a look at the measurement software it has both measurement and comparison capability.
Some of this type software can be used on captured images from other sources.
There many makers of this type instrument.

http://www.caltexsci.com/

http://www.caltexsci.com/measurement_software.htm

ttabolt (Industrial)

16 Apr 11 9:18

The frequency of the inspections should determine your investment in the measuring process. If this must be checked several times per hour, then a very expensive equipment is justified - even automation of measurements.
If only 1x/month or so, then your contract inspection is best economics. I agree with btrueblood (Mechanical) - many makers of this equipment. OGP, Nikon, Sony, Zeiss.

nornrich (Mechanical)

1 May 11 23:03

Junid,

There are a couple of off the shelf 2D, high precision sensors, that will measure a profile. We have used Omron and Keyence in the past. Price point for this level of measurement with this level of accuracy is going to be around $7-14 thousand for the sensor, with some additional money for a computer and programming.

Rich..... viking2