1. From
Albion Devices, Inc.
www.AlbionDevices.com
Presented by
Paul Sagar
President
Temperature Compensationof Shop Floor Gages

2. About Albion
Albion Devices, Inc., was founded in 1988.
Albion was first to make a concerted effort to address the problem of thermal expansion as it affects shop floor gages
We have developed many products, software programs and custom sensors for temperature compensation applications.
We have had hundreds of successful applications.
Customers include all Big Three auto companies, major railroads, GE, bearing companies (SKF), printers, auto industry suppliers, etc.
Albion Devices, Inc.
3. Why Compensate for Temperature?
Albion Devices, Inc.
Because variations in temperature during the production process cause measurement errors.
Particularly when close to tolerance limits.
Correction improves customer acceptance, product performance and correlation.
60 measurements taken of the same feature on the same part on the same shop floor gage over a period of 2 weeks. Measurements varied by approx. 100% of tolerance due almost entirely to varying ambient temperatures.
4. Benefits of Eliminating Thermal Errors
Consistent Accuracy (rather than precision)
Maintains Gage R&R on shop floor.
Gives Dimension at the International Standard 68F / 20C, (or other specified nominal temperature).
Albion Devices, Inc.
5. Product History
Snap gages
Tcomp (tee-comp)
GageComp
Sensors
MicroComp
Tcomp II
Albion Devices, Inc.
6. Latest Development
Fireball Digital Temperature Sensors (and Measurement Probes).
DigiGage software.
Albion Devices, Inc.
7. Applications
Albions systems have been used to compensate a wide range of gages.
Albion Devices, Inc.
8. Temperature Compensation System Components
Albion Devices, Inc.
Combined Workpiece/Master Temperature Sensor, for OD or ID.
Gage Temperature Sensor.
Connecting cables.
Controller or PC.
9. Sensor Configuration
Workpiece sensor positioned to pick up temperature of workpiece and master.
Gage sensor monitors temperature of fixture or gage.
For Temp Comp to be most effective, best to MINIMIZE contact between gage and workpiece.
Albion Devices, Inc.
LVDT
Workpiece/
master
sensor
Workpiece
Gage Fixture
Gage
sensor
Note minimal contact
10. Applied Principles
Compensate for Work, Master and Gage.
Note: Gage, not ambient.
Sense each temperature independently.
Customizable coefficients of correction.
Nominal size.
Workpiece
Temperature
Master
Temperature
Gage
Temperature
Workpiece
Coefficient
Master
Coefficient
Gage
Coefficient
Compensation
Algorithm
Nominal
size
Correction
Offset
Albion Devices, Inc.
11. Linearity
Albion Devices, Inc.
Coefficients of Expansion are often non-linear over large temperature ranges.
However, materials used in mass produced items are linear over the temperature range that concerns us.
F
F
12. Correction Coefficients
Practically speaking, strict handbook COEs are not necessarily the most accurate.
Several factors influence the way sizes vary with temperature (e.g. combinations of materials and geometries, thermal gradients, joints, springs).
Albion refers to the net effect of these influences as the Correction Coefficient.
One way to determine the Correction Coefficient is through Characterization.
Albion Devices, Inc.
13. Characterization
Empirical determination of Correction Coefficients.
Patiently heat and cool parts, masters and gages independently while taking measurements.
Results used to calculate linear coefficient.
Albions new software (DigiGage) includes a program that facilitates this procedure.
Albion Devices, Inc.
14. Operator Involvement
Albion Devices, Inc.
Temp Comp systems are designed to run in the background.
Just need to be Zeroed when gage is zeroed (may sometimes be automatic).
System will automatically sense temperatures of work, master and gage, compute correction and apply it to measurements.
The result is that the gage displays dimension as if workpiece, master and gage were at nominal temperature (usually 68F/20 C)
15. Temperature Sensors
Compromise between speed and durability.
Custom-designed for heavy duty, shop floor use.
They balance durability and speed of response.
Maintenance: Keep clean and free of chips, excess oil.
Graph above shows typical contact sensor asymptotic response curve.
Albion Devices, Inc.
16. Success
Data obtained by Big Three auto co. Plug gage equipped with Albions temperature compensation system measuring aluminum housing bore.
Albion Devices, Inc.
17. Digital temperature sensors and gaging probes
Albion Devices, Inc.
Fireball and DigiGage
18. Fireball Temperature Sensors
Albion Devices, Inc.
Temperature sensors with direct USB connectivity.
DigiGage software programmable with all variables for temperature compensation algorithm.
DigiGage reads, calculates and displays.
19. Fireball Digital Gaging Probe
Albion Devices, Inc.
Low cost per measurement channel.
Instant USB connectivity.
0.0001 mm/0.000005 inch accuracy and repeatability.
Various measurement ranges, linear throughout.
No expensive external signal conditioning and amplification circuitry.
Pre-calibrated at the factory.
Minimal setup time. Plug and play.
Requires single master only.
Multiple probes via USB ports on PC or hubs.
Optional interface to SPC programs.
20. DigiGage Software
Albion Devices, Inc.
Multiple capabilities:
Temperature compensation offset output only.
Temperature compensated dimension output.
Gage probe display.
Can be configured to output offset to other gaging software. (Needs cooperation with software vendors or software engineers to create .dll).
DigiGage includes characterization routine.
21. Complete Temp Comp System for PC
Albion Devices, Inc.
Combine:
Up to 8 temperature sensors
DigiGage software
A complete temperature compensation system based on a PC.
Runs in background, interfacing to customers preferred host SPC or gaging software.
22. Albion Devices, Inc.
www.AlbionDevices.com
Thank You