LaserSpeed: Not All Non-Contact Length and Speed Encoders Are Created Equal
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The document discusses the importance of understanding non-contact laser encoders and their advantages over contact methods in length and speed measurement. It highlights various testing methods, feature comparisons, and application examples to evaluate encoder performance and suitability for different conditions. The conclusion emphasizes considering the transition to non-contact measurement as an investment that can lead to significant cost savings and improved product quality.
LaserSpeed: Not All Non-Contact Length and Speed Encoders Are Created Equal
- 1. Not All Non-Contact Length and Speed Encoders Are Created Equal
- 2. Non-Contact Laser Measurement Non-Contact Laser Encoder Today’s Speaker Regional Market Manager Veteran of high-tech measurement controls industry Mechanical engineer & engineering metrologist 20 yrs with Beta LaserMike Stuart Manser, Beta LaserMike Extensive expertise in non- contact measurement
- 3. Non-Contact Laser Measurement Non-Contact Laser Encoder Presentation Overview Intro: Why it’s important to know the difference between all the gauges on the market Comparing device performance through tests Comparing feature sets Application example Conclusion Questions
- 4. Non-Contact Laser Measurement Non-Contact Laser Encoder Introduction Non-contact length & speed measurement is becoming increasingly cost effective Significantly better than contact methods But, not all non-contact encoders are created equal There are accuracy and performance differences that affect ROI Important to verify and compare gauge performance at your facility and with your product
- 5. Non-Contact Laser Measurement Non-Contact Laser Encoder Test Setup Items needed: Quadrature outputs Counter or meter panel Calibrated standard Installation and configuration Mount encoders close to each other Connect counters to quadrature outputs Tie reset signals to each counter Discuss test plans with each encoder manufacturer
- 6. Non-Contact Laser Measurement Non-Contact Laser Encoder Comparison Tests Evaluating encoders under various situations Test 1: Length Measurement During Steady Speed 1. Start up line and bring to normal operating speed 2. Reset counters and mark product 3. Run for certain length 4. Mark product and record counter lengths 5. Compare actual verified length with reported counter lengths
- 7. Non-Contact Laser Measurement Non-Contact Laser Encoder Comparison Tests Evaluating encoders under various situations Test 2: Length Measurement During Acceleration & Deceleration 1. Reset counters 2. Start up line 3. Run line with as many acceleration/deceleration periods as possible 4. Stop line 5. Compare actual verified length with reported counter lengths
- 8. Non-Contact Laser Measurement Non-Contact Laser Encoder Comparison Tests Evaluating encoders under various situations Test 3: Measurement Acquisition Times 1. Start up line 2. Switch counters to speed/rate 3. Block each laser beam 4. Watch how long it takes for the speed to drop to zero 5. Wait an additional 30 seconds 6. Unblock each laser beam 7. Watch how long it takes for the counter to display the actual line speed
- 9. Non-Contact Laser Measurement Non-Contact Laser Encoder Comparison Tests Evaluating encoders under various situations Test 4: Length Measurement Under Varying Temperature Conditions 1. Start up line and bring to normal speed 2. Reset counters and mark product 3. Run for certain length 4. Mark product and record counter lengths 5. Compare verified length with reported counter lengths 6. Repeat steps 1 – 5 and cool gauge 7. Repeat steps 1 – 5 and heat gauge
- 10. Non-Contact Laser Measurement Non-Contact Laser Encoder Comparing Feature Sets For usability and ease of integration Feature 1: Stand-off Distance Long stand-off distance protects gauge from damage Short stand-off distance allows you to mount gauge in tighter area Key Point: Look at the different stand-off distances available for your unique application. Note: stand-off distance affects the size of measurement area
- 11. Non-Contact Laser Measurement Non-Contact Laser Encoder Comparing Feature Sets For usability and ease of integration Feature 2: Depth of Field (Measurement Area) Region where product moves through sensor’s laser Larger measurement area = more tolerance Determines if operator needs to reposition the gauge when product approaches limits Key Point: Look at the different depth-of-field ranges available to meet your measurement needs.
- 12. Non-Contact Laser Measurement Non-Contact Laser Encoder Comparing Feature Sets For usability and ease of integration Feature 3: Speed Range All non-contact length & speed gauges have a specified speed range Key Point: Choose a gauge that covers your entire operating range for all production processes. Example: Line speed 3000 ft/min for 25,000 ft Gauge has min speed of 1.3 ft/min Line running below 1.3 ft/min for .5 sec at startup and when line is stopped Assume worst case: 1.2 ft/min during 1 second Max. additional error = 0.02 ft or 0.0008% over the 25,000 ft
- 13. Non-Contact Laser Measurement Non-Contact Laser Encoder Comparing Feature Sets For usability and ease of integration Feature 4: Outputs How do you plan to use the gauge? Replace encoder: same outputs? Can outputs be scaled? Identify length and speed update rate RS-232 or other comm ports available? Status indicator: working/not working? Key Point: Compare gauge outputs. Choosing the right gauge means the difference between optimal or marginal communication capabilities.
- 14. Non-Contact Laser Measurement Non-Contact Laser Encoder Comparing Feature Sets For usability and ease of integration Feature 5: Environmental Specifications Consider temperature during all seasons and at installation location Cooling options? Cooling ports? Install fan or cooling unit near gauge? Key Point: Be sure to compare operating temperature ranges and IP rating (or degree of protection).
- 15. Non-Contact Laser Measurement Non-Contact Laser Encoder Comparing Feature Sets For usability and ease of integration IP rating is 2-digit number describing the gauge’s protection against solid objects and liquids.
- 16. Non-Contact Laser Measurement Non-Contact Laser Encoder Comparing Feature Sets For usability and ease of integration Feature 6: Gauge Measurement Flexibility Can the gauge measure all products you manufacture? Shape Color Surface texture Reflectivity Key Point: Look for measurement versatility. This helps you change quickly from product to product without having to make time- consuming gauge adjustments. Also, minimizes # of spares required.
- 17. Non-Contact Laser Measurement Non-Contact Laser Encoder Comparing Feature Sets For usability and ease of integration Feature 7: Optional Components Interfaces or interface converters? Environmental protection? Air wipes Quick change windows or housings Diagnostic software? Key Point: Compare options closely to get the added performance edge.
- 18. Non-Contact Laser Measurement Non-Contact Laser Encoder Application Example Profile: Communication Cable Length Problem: Inaccurate Length. The installed non-contact encoder can’t track the rapid acceleration/deceleration, ramp- up/down on the production line. Solution: LaserSpeed >> tested by customer and found to follow the line ramp-up/down. Results: Accurate cable reel lengths to +/- 0.05%. Secondary cabling process has predictable lengths for each component cable.
- 19. Non-Contact Laser Measurement Non-Contact Laser Encoder LaserSpeed Performance LaserSpeed technology in marketplace since mid-1980s +/-0.05% accuracy, +/- 0.02% repeatability Measure product speeds to 65,600 ft/min (20,000 m/min) Stand-off distances to 98.4 in (2.5M) Depth of field to 8.0 in (200 mm) Measures Forward, Reverse, and down to Zero Speed
- 20. Non-Contact Laser Measurement Non-Contact Laser Encoder LaserSpeed Performance - continued Variety of industrial outputs: quadrature, RS-232, etc. 100,000 measurements per second Combats intermitted readings in contaminated environments Customizable pulse rates to 5 MHz Experienced team with extensive application knowledge Global service & support
- 21. Non-Contact Laser Measurement Non-Contact Laser Encoder Conclusion Jump from contact to non-contact measurement may seem expensive Look at it carefully Consider it an investment Advantages are numerous: Significant cost savings Increase product quality Improve processes Important to evaluate all aspects
- 22. Non-Contact Laser Measurement Non-Contact Laser Encoder Product & Contact Information www.laserspeedgauge.com www.laserspeed.eu USA: +1- 937-233-9936 UK: + 44 1628 401510 Germany: +49(0)231 758 93 0 Asia: +86 21 6113 3688 eMail: sales@betalasermike.com