influence of temperature changes on a linear motion system · influence of temperature changes on a...
TRANSCRIPT
![Page 1: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/1.jpg)
Influence of temperature changes on a linear motion system
Jonathan Abir, Paul Shore, Paul Morantz
Laser Metrology and Machine Performance (LAMDAMAP) 2015
![Page 2: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/2.jpg)
2
Research overview
• Design and control of a compact linear motion system for high dynamic performance
• Lightweight structure
• High ratio of moving mass to static mass
• Structural flexibility
• Low damping
• The linear motion system characteristics:
Thermal distortion
![Page 3: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/3.jpg)
3
What is the linear motion system?
Slave side guideway
Master side guideway
Carriage
Encoder
491mm
609mm
215mm
• Main material - Aluminium
• Guideways material - Alumina
![Page 4: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/4.jpg)
4
Bearing arrangement
Slave side
Master side
Roll
Pitch
Yaw
Z
X
Y
• Over constrained design - Roll
• Symmetric design
![Page 5: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/5.jpg)
5
Aluminium 6061
Alumina AD 96
Inverse
specific
stiffness
ρ∙E-1 [s2∙m-2]∙10-6
0.39 0.12
Expansion/
conductivity
α∙λ-1 [m∙W-1]∙10-6
0.14 0.24
Inverse
diffusivity
ρ∙Cp∙λ-1
[s∙m-2]∙10-6
0.01 0.5
CTE α [µm/m·°C]
23.6 @ 23-100 °C
6 @ 25-200 °C
Material properties
Alumina Guideway
Aluminium Frame plate
Lower values – superior material
![Page 6: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/6.jpg)
6
Why using Alumina guideways?
FEM simulation @ Free-Free boundary condition
Improving dynamic performance
Mode #
Frequency [Hz] Aluminium guideways
Alumina guideways
Improvement
1 107 103 -4 2 122 134 12 5 361 395 34
8 551 582 31
![Page 7: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/7.jpg)
7
What is measured?
Thermal distortion of: guideways and frame
![Page 8: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/8.jpg)
8
Where it was measured?
Leitz PMM-F CMM
1.9 ( / 400)
@18 22
MPE L m
C
3000mm
1000mm
2000mm
![Page 9: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/9.jpg)
9
Component on a CMM
Measured component
Coordinate Measuring Machine
Three points support
![Page 10: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/10.jpg)
10
Heating the component on a CMM
Measured component
Coordinate Measuring Machine
Three points support
Heat sources
![Page 11: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/11.jpg)
11
Insulating the CMM
Measured component
Coordinate Measuring Machine
Three points support
Heat sources
Reflection and insulation materials
![Page 12: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/12.jpg)
12
Measured component
Reflection and insulation materials
Three points support
![Page 13: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/13.jpg)
13
Heating source - lamps
Measured component
Reflection and insulation materials
![Page 14: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/14.jpg)
14
Measurement at ambient temperature (reference)
Reference measurement
![Page 15: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/15.jpg)
15
Response to applied heat
Reference measurement
![Page 16: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/16.jpg)
16
Turning off the heat sources
Reference measurement
![Page 17: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/17.jpg)
17
Measurements at elevated temperature
Reference measurement
Measurements at elevated temperatures
![Page 18: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/18.jpg)
18
Reference measurement
Reference measurement
Measurements at elevated temperatures
Measurement at ambient temperature (2)
![Page 19: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/19.jpg)
19
Reference measurement
Aluminium restraint bar
Alumina guideway
![Page 20: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/20.jpg)
20
Aluminium restraint bar
Alumina guideway
Applying heat – lamps
![Page 21: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/21.jpg)
21
Measurement(s) at elevated temperature
Aluminium restraint bar
Alumina guideway
![Page 22: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/22.jpg)
22
“Bottom up” methodology
Alumina Guideway Aluminium restraint bar
Alumina Guideway
Alumina Guideway
Aluminium Frame plate
D. Distortion of full assembly
A. Expansion of single component B. Bending of two components bolted together
C. Bending of Three components bolted together
![Page 23: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/23.jpg)
23
24.32[µm/m·°C] (23.6 [µm/m·°C])
5.72 [µm/m·°C] (6 [µm/m·°C])
Aluminium plate
Alumina Guideway
Linear expansion of single component
![Page 24: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/24.jpg)
24
FEM and measurements of two components bolted together
Aluminium restraint bar
Alumina guideway X
Y
![Page 25: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/25.jpg)
25
FEM and measurements of three components bolted together
X
Y
Aluminium frame plate
Aluminium restraint bar
Alumina guideway
![Page 26: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/26.jpg)
26
Flatness measurements at different temperatures of three components bolted together
![Page 27: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/27.jpg)
27
Measuring the thermal distortion of full assembly
![Page 28: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/28.jpg)
Schematic view of bended guideways
Slave side guideway
Master side guideway
![Page 29: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/29.jpg)
29
Flatness measurements of slave and master guideways
![Page 30: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/30.jpg)
Summary:
•Thermal distortion can be measured using a CMM
30
•Thermal distortion can be measured using a CMM •Heating a component on the CMM requires: Thermal insulation
Temperature monitoring •A “bottom up” methodology improve the measurements confidence •The setup allows a repeatable measurement process
•Thermal distortion can be measured using a CMM •Heating a component on the CMM requires: Thermal insulation
Temperature monitoring
•Thermal distortion can be measured using a CMM •Heating a component on the CMM requires: Thermal insulation
Temperature monitoring •A “bottom up” methodology improve the measurements confidence
![Page 31: Influence of temperature changes on a linear motion system · Influence of temperature changes on a linear motion system Jonathan Abir, Paul Shore, Paul Morantz Laser Metrology and](https://reader036.vdocuments.mx/reader036/viewer/2022070720/5ee084a1ad6a402d666bb017/html5/thumbnails/31.jpg)
Future work:
•Measuring the dynamic performances •Developing a compensation method for the structural flexibility •Improving the servo bandwidth, settling time, position error
31