laser alignment - basic shaft and geometric concepts
Post on 19-Jan-2015
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Laser Alignment – not just Shaft Alignment!
Christo van der Walt, CEO, Engineering Dynamics, “Laser Alignment – not just Shaft Alignment”
www.worldtrendsinmaintenance-eng.com
Facts About Lasers
Christo van der Walt, CEO, Engineering Dynamics, “Laser Alignment – not just Shaft Alignment”
Diode laser400nm 700nm
10nm100nm 1m 10m 100m 1mm
Visible light
Infrared lightUltraviolet
Typical laser wave length is at 690 nm
Older HeNe style tube for Laser beam generation
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Facts About Lasers cont.
Christo van der Walt, CEO, Engineering Dynamics, “Laser Alignment – not just Shaft Alignment”
CCD
The Position Sensing Device PSD is used to determine the position of the laser beam for further calculations
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Divergence
Christo van der Walt, CEO, Engineering Dynamics, “Laser Alignment – not just Shaft Alignment”
All laser beams diverge. Optics are used to control the divergence for the required distance and detector size.
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Laser Beam Centering
Christo van der Walt, CEO, Engineering Dynamics, “Laser Alignment – not just Shaft Alignment”
Laser beams are not perfectly round, but the PSD senses the true center and use that for calculations
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Environmental Effects
Christo van der Walt, CEO, Engineering Dynamics, “Laser Alignment – not just Shaft Alignment”
Like any optical system, lasers will also be influenced by environmental effects and can play havoc with results
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Thermal Growth
Christo van der Walt, CEO, Engineering Dynamics, “Laser Alignment – not just Shaft Alignment”
Be aware of different setup requirements for when machines are “hot” and “cold”. OEM values can be inserted into our systems to achieve correct alignment.
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Straightness
Christo van der Walt, CEO, Engineering Dynamics, “Laser Alignment – not just Shaft Alignment”
Straightedge and dial indicator
Straightedge and thickness gauge
Spirit level
Optical system and target
Laser and detector
Different straightness measurement methods. Changing the reference or zero points can change the results. Visit our geometry systems.
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Straightness Results
Christo van der Walt, CEO, Engineering Dynamics, “Laser Alignment – not just Shaft Alignment”
A Typical straightness plot using a dual-axis detector to show horizontal and vertical values.
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Flatness
Christo van der Walt, CEO, Engineering Dynamics, “Laser Alignment – not just Shaft Alignment”
Here we add another “dimension” to a straightness measurement. The 3-D display helps in understanding the situation for machine bases and flanges. Learn more here.
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Squareness
Christo van der Walt, CEO, Engineering Dynamics, “Laser Alignment – not just Shaft Alignment”
Values from one plane is compared to another using the pentaprism and switching the beam by 90 degrees. Learn more about Machine tool systems here.
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Spindle Direction
Christo van der Walt, CEO, Engineering Dynamics, “Laser Alignment – not just Shaft Alignment”
Spindle direction or pointing direction is useful after a “crash” or damage to the lathe. The results are for horizontal and vertical directions.
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Line Bore (straightness)
Christo van der Walt, CEO, Engineering Dynamics, “Laser Alignment – not just Shaft Alignment”
Bearing pockets or propeller shaft bearings are typical applications in 2 directions of line bore measurements. Visit line bore systems here.
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Pulley/V-Belt Alignment
Christo van der Walt, CEO, Engineering Dynamics, “Laser Alignment – not just Shaft Alignment”
V-belts, chains etc. can be aligned by laser. Tolerances can be used. See our range here.
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Christo van der Walt, CEO, Engineering Dynamics, “Laser Alignment – not just Shaft Alignment”
Please visit our website at www.edprevent.com or call us at +27 12 9913168 for more information.
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