How to Build Robotic Positioning Systems for Long-Stroke Applications
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The webinar discusses building robotic positioning systems for long-stroke applications, emphasizing the components that ensure high speed, accuracy, low backlash, and maintenance. Various drive options are explored, including belts, ballscrews, and linear motors, each with unique benefits and limitations. Nexen's precision motion control products, such as the roller pinion system and harmonic gearheads, are highlighted for their contributions to enhancing the performance of these positioning systems.
How to Build Robotic Positioning Systems for Long-Stroke Applications
- 1. #DWwebinar How to Build Robotic Positioning Systems for Long-Stroke Applications
- 2. #DWwebinar q This webinar will be available afterwards at www.designworldonline.com & email q Q&A at the end of the presentation q Hashtag for this webinar: #DWwebinar Before We Start
- 3. #DWwebinar Lisa Eitel Motion Editor — Power Transmission and Motion Control Design World Magazine Jean-Paul Beyak Regional Manager, Midwest/Eastern USA & Canada Director of Sales, Latin America Nexen Group Inc. How to Build Robotic Positioning Systems for Long-Stroke Applications
- 4. #DWwebinar Gantry and robot-positioning systems perform myriad functions:
- 5. #DWwebinar RTUs — Sold as pre-engineered assemblies, as custom-engineered systems from integrators, or built from motion components TranTek ABB Milwaukee MachineTool
- 6. #DWwebinar Gantry and robot-positioning systems need components that deliver: High speed • High positional accuracy • Low backlash •
- 7. #DWwebinar Otherwise, alternative designs also called robot-transfer units (RTUs) use adaptive control to prioritize flexibility …
- 8. #DWwebinar RTUs for gantry and precision robot-positioning systems necessitate: • Low maintenance • Long life • Safety
- 9. #DWwebinar The long-stroke applications can use drives with: Belts Rack-and-pinion sets Linear motors Ballscrews ... and all drive types have benefits and limitations. Gantry and robot-positioning RTUs use an array of drive setups
- 10. #DWwebinar Check out this example — an RTU that lets one robot automate a whole machine-tool operation: Gantry and robot-positioning systems abound
- 11. #DWwebinar Robot gantries traversing mid-range linear distances use motor+ belt designs — belt drives are quite common on H robots and other gantry setups… ... especially those with shorter strokes
- 12. #DWwebinar … so are more common on shorter axes … but there are exceptions to the scalability caveat. Belt drives in long-stroke applications can be subject to limitations
- 13. #DWwebinar — these use framing and linear tracks in various orientations to get more precision from belt drives … Belt-driven gantry and robot-positioning RTUs exist — Stroke — 30 ft Payload — 3,000 lb Repeatability — ±0.001 in.
- 14. #DWwebinar ... So what are some benefits and caveats? Long-stroke applications can also use drives with ballscrew axes … Peak Analysis & Automation — robot track with ballscrew or linear motor option Thomson linear ballscrew-driven axes exceed 10-meter strokes
- 15. #DWwebinar Long-stroke applications with ballscrew-driven axes must address the challenge with more supports, appropriate diameter, and speed limits … On longer axes, the main problem is whip—
- 16. #DWwebinar Long-stroke applications with screw variations … … just another option: There are other iterations of screws in seventh-axis setups—
- 17. #DWwebinar Consider this option — using linear actuators driven by servomotors instead of hydraulics for vertical platform lifts. One manufacturer decided it was the only option. Long-stroke vertical arrangements are also seeing alternative designs
- 18. #DWwebinar Motor-driven actuators on the lifts ensured a clean environment for the composite aircraft-hull manufacture. Electric actuators may come to displace hydraulics for aerospace
- 19. #DWwebinar Pneumatic robot transfer units (RTUs) — low-cost solution for A and B Not to say that fluid power is completely out …
- 20. #DWwebinar Accurate though expensive • More common is average-sized gantry setups Linear motors … always an option
- 21. #DWwebinar Eight meters long … reproducible accuracy of ±0.01 mm Linear motors … here, for a specialty application
- 22. #DWwebinar • Higher accuracy; more controllability Rack-and-pinion sets excel on seventh-axis designs (RTUs)
- 23. #DWwebinar Stroke — 30 meters with repeatability to ±0.2 mm!
- 24. #DWwebinar • Standard for the longest setups • Length exceeds 50 feet Rack-and-pinion sets — for the longest RTUs
- 25. #DWwebinar • Racks assemble together • Rack-pinion sets maintain accuracy More rack-and-pinion sets (though note difference in guides + bearings that keep tracks aligned and supported)
- 26. #DWwebinar Quick note on software considerations — Programming
- 27. #DWwebinar Another quick note on software considerations — Calibration
- 28. #DWwebinar Now we’ll hear from Jean-Paul Beyak, regional manager for our sponsor on this topic. Beyak will explain some of Nexen’s product offerings, including: • A zero-backlash roller-pinion system in linear-rack and rotary-gear forms • A high-speed PRD Precision Ring Drive indexer • A compact HG Harmonic Gearhead Jean-Paul Beyak Regional Manager, Midwest/Eastern USA & Canada Director of Sales, Latin America Nexen Group Inc.
- 29. Precision Motion Control Solutions for Gantry and Robot Positioning Systems Jean-Paul Beyak Eng. BIE, MBA Regional Manager jbeyak@nexengroup.com
- 30. Gantry and Robot Positioning Systems Gantry and Robot Positioning/Transfer Systems require components that provide some or all of the following attributes: high speed, positional accuracy, low backlash, low maintenance, long life and safety. Nexen offers numerous innovative Precision Motion Control products that provide these benefits and integrate well into these types of systems.
- 31. Precision Motion Control Products
- 32. RPS Roller Pinion System The Precision Roller Pinion System converts rotary motion to linear motion. Its revolutionary design makes it an excellent choice for applications that require a linear drive system.
- 33. Linear Drive Technologies • RPS Roller Pinion System • Linear Motors • Ball Screws • Rack and Pinion • Lead Screws • Chain Drives • Belt Drives
- 34. Roller Pinion System (RPS) • High Positional Accuracy (up to 30 µm) • Unlimited Travel Distances (modular) • Extremely High Speeds (up to 11 m/s) • Near Zero Backlash (≤3.2 µm) • Low Maintenance/No Maintenance • Long Life (60,000,000 pinion revs) • Efficient (>99%) • Quiet (≤75 db) • No Magnetic Field
- 35. RPS Pinion Bearing & Roller
- 38. Flow Waterjet and RPS The ability that it provides for our new modular waterjet system (an industry first) to be expanded by customers as their business needs change, has single-handedly won us three orders totaling over one million dollars. Besides these three orders, other post-sales interviews were quick to iden5fy the Nexen RPS system as THE KEY DRIVER of their decision to "go Flow". Ongoing accuracy tests have conBnued to be fantasBc and these machines are turning out the most accurate waterjet parts the world has ever seen. We conBnue to be impressed, as we increasingly see the benefits of a high-precision, backlash free, highly efficient, modular moBon system is able to do. TIM FABIAN Manager, Global Product MarkeBng Flow Waterjet Americas
- 39. Rotary RPS Systems • Accurate Positioning • Near Zero Backlash • High Speed • Arc Segments, Rings & Fully Programmable Ring Drives
- 40. HG Harmonic Gearhead Industry’s Shortest and Most Compact Automation Gearhead • Compact-Replace Larger, High-Ratio Planetary Gearheads • Zero Backlash, Extremely Accurate Save up to 70% or more in Gearhead length
- 41. Aerospace Gantry Riveting System
- 43. #DWwebinar How to Build Robotic Positioning Systems for Long-Stroke Applications Questions? Lisa Eitel Design World @DW_LisaEitel Jean-Paul Beyak Nexen Group Inc. @NexenGroup
- 44. #DWwebinar Thank You q This webinar will be available at designworldonline.com & email q Tweet with hashtag #DWwebinar q Connect with Design World q Discuss this on EngineeringExchange.com