A low backlash precision worm gear drive - Winsmith

1 ". A low backlash precision worm gear drive OVERSIZED COUPLING ACCESS HOLE- ADJUSTMENT CARTRIDGE- Provides for easy motor & gear drive assembly. Fine threaded cartridge with (Not shown) dual angular contact ball bearings which allows precise adjustment of the worm backlash . BEARING SUPPORT DESIGN. (EACH END OF worm ). Provides the best design to minimize backlash and provides high structural rigidity. COUPLING STYLE SERVO. MOTOR ADAPTOR- Wide variety (square & round) to match most servo & NEMA frame motors. Prevents the cartridge ( backlash setting). from axial movement. SPLASH LUBRICATION- backlash precision - Oil reservoir, for high thermal capacity, Factory adjusted for maximum of 2 arc filled to operating level minutes of backlash . with synthetic lubricant for high efficiency and minimum maintenance. S-ELIMINATOR worm - Patented design which allows very low backlash settings. I. WlNSMITH. All of us at Winsmith thank you for your interest in In any position control application, perhaps the most our newest catalog.

2 This motion control catalog is important consideration from a mechanical component our first effort at combining our decades of precision selection standpoint is that no component, including the gear design and manufacturing experience with the new gear reducer, should negatively affect the precision patented technology that we developed to offer a wide control of the electrical and electronic components. Since variety of low backlash products. the total control objective is precision , repeatable cycling and positioning of the mechanical output, normal gear This entire catalog is devoted to precision motion control reducer transmission errors and backlash often create gear reducers. All the gear reducer products covered performance problems. in this catalog are designed to address requirements beyond the basic reduction of speed and multiplication We at Winsmith have developed a broad technical under- of torque. This catalog offers products specifically standing, expertise and product offering in gear reducers designed to complement position control requirements to address the specific needs of position control systems.

3 Where servo or stepper motors are used for electro- Specifically, we apply several different approaches to the mechanical conversion. minimization of backlash . In position control applications involving high linear or We realize that a few years ago, most all position control angular velocities and short cycle rates, the primary role of gearboxes utilized a parallel input to output construction, a gear reducer is to optimize overall system performance using either: helical, planetary or harmonic gearing. Few and cost by matching the inertias between the load and manufacturers even offered right angle worm gears for the servo or stepper motor. When relatively low final these demanding applications. positioning velocities are required, the torque multiplica- worm gears specifically designed for position control are tion function of the gear reducer becomes a major factor now available and they offer some distinct advantages. in system cost optimization.

4 worm gears are the most cost effective "mid to high". ratio reducers available. Moving a servo- gear design from a parallel or inline to a right angle configuration will often save space and money. Extremely low backlash (2 arc minutes) worm gears are available. Even field backlash adjustable worm gearboxes are now available. Because of both the "wear-in" characteristics of worm gears after some operations and the new field adjustable'. capabilities, backlash of arc seconds can be achieved. worm gear technology advancements continue to reduce gear mesh losses. In low 5:1 and 10:1 ratios gear mesh efficiencies are approaching Although you may not have considered them in the past, specially designed right angle worm gears deserve serious consideration in any position control application. We hope this catalog helps you realize the advantages of a worm gear alternative. If your requirements exceed the catalog offering, consider our technological expertise and willing- ness to design and build "modified" and "specials:' and call us at Winsmith .

5 Werner Heller Manager of Engineering Werner Heller graduated from Mannheim Engineering College and General Motors Institute with a He has worked with: Opel-GM, Ford, Curtis Wright, Warner Electric and joined Winsmith in 1974. He has received patents in the areas of: planetary gears, integral bi-directional spring clutches, adjustable lead worm gears and hydraulic ratio control systems and one on low backlash planocentric gears is pending. Werner is also a licensed FAA-ANP and has a multi engine pilot's license. ii motion control . FAMILY OF PRODUCTS. S-ELIMINATOR C-ELIMINATOR. (AXIAL ADJUSTABLE worm ) (VARIABLE CENTER DISTANCE). S-MINIMIZER C-MINIMIZER. (MINIMUM FIXED backlash ) (MINIMUM FIXED backlash ). iii TABLE OF CONTENTS. Page motion control Product Family .. A1. Introduction .. A2. ~NTRODUCTION motion control Size Selection Procedures .. A3 A7. Selection Worksheet .. A8. motion control Order Form .. A9. How To Order .. A10 A12. S ELlMINATOR Introduction & Capabilities.

6 81 82. S-ELIMINATOR Condensed Mechanical Ratings .. 83-84. S-ELIMINATOR Reducer Ratings .. 85-816. S"ELIMINATOR S-ELIMINATOR Dimensions DNK .. 817 DSNK .. 820. DTK .. 818 DSTK .. 821. DVK .. 819 DSFK .. 822. S-MINIMIZER Introduction & Capabilities .. C1 C2. S-MINIMIZER Condensed Mechanical Ratings .. C3-C4. S MINIMIZER Condensed Thermal Ratings .. C5-C6. S-MINIMIZER Dimensions S"MINIMIZER DN .. C7. D8 .. C8. DSN .. C11. DST .. C12. DT .. C9 DSF .. C13. DV .. C10. C-ELIMINATOR Introduction & Capabilities .. D1 D2. ELIMINATOR C-ELIMINATOR Condensed Mechanical Ratings .. D3-D4. C-ELIMINATOR Reducer Ratings .. D5-D20. C-MINIMIZER Introduction & Capabilities .. E1-E2. C-MINIMIZER Condensed Mechanical Ratings .. E3 E4. C"MINIMIZER C-MINIMIZER Condensed Thermal Ratings .. E5-E6. C-ELIMINATOR/C MINIMIZER Inertia Chart .. E7. motion control Options .. F1. NEMA Motor Flange Capability .. F2. Servo Motor Flange Capability OPT~ONS. Round 80dy.

7 F3. Square 80dy .. F4. Servo Motor Flange Capability .. F5. SF Flange Register Option .. F6. GAM/Jakob Flexible Couplings .. F7. Horsepower & Torque Discussion .. G1. Overhung Load Calculations .. G2-G3. 8acklash .. G4-G5. ENGINEERING DATA worm gear Drives in motion control Applications .. G6. Useful Formulas .. G7. Resource Guide .. G8. DISTRICT SALES. Terms & Conditions .. H1. OffICES AND District Sales Offices & Service Centers .. H2. SERVICE CENTERS. iv I. motion control . PRODUCT FAMILY. Winsmith has provided the industrial power trans- Both products are available in a wide range of configura- mission market place with quality enclosed gear products tions and sizes. Many motion control accessories have for decades. Products as diverse as differential planetary been developed to make these products easy to use. and worm gears are provided to every segment of the market. Products range from standard off-the-shelf to C-LlNE motion control PRODUCTS.

8 Custom designed gearboxes. As these services have This part of the motion control family of products expanded to different market segments, Winsmith is developed around the CoLine worm gear product. began to receive many requests from motion control These products are: users. The demand for products with a higher level of precision began to drive many product enhancements D C-ELIMINATOR-This is an adjustable backlash at Winsmith to better serve these needs. These product utilizing small changes in unit center distance enhancements have further led Winsmith to develop to change the backlash . A maximum of 6 arc minutes new higher precision products to serve motion control of backlash can be maintained. users. The motion control product family brings together these product enhancements and new products D C-MINIMIZER-This is a fixed backlash product shipped in an effort to serve motion control users with the best from the plant with a maximum of 11 arc minutes of precision right angle and in-line (under development) backlash .

9 gear products available. Both products are available in a wide range of configura- The motion control product name was chosen to tions and sizes. symbolize the mastery these products will have on motion control gear requirements. The Winsmith motion These motion control products represent a control product line sets new standards for cost carefully selected group of Winsmith product and competitive low backlash products. Since the motion capabilities that specifically serve motion control needs. control product line was built around some of our Winsmith is pleased to bring this complete family of standard products, the motion control products gear product solutions to the growing world of motion realize some of the cost advantages of our standard control users. The growing world of motion control industrial products. The use of standard products as a should find the wide range of motion control . basis for the motion control products also allows products very useful in discovering solutions to their the user a wider range of product configurations than all requirements.

10 Other precision gear products. The motion control family of products is structured around two approaches for achieving precision backlash control . One approach provides the ability for backlash adjustment over the life of the product. This approach allows for the highest level of precision . Products produced to low backlash levels that are non-adjustable make up the other approach. backlash levels achieved in this approach are not as low as the adjustable approach but still meet most of the marketplace requirements for precision gear products. D-90 TYPE SE motion control PRODUCTS. This part of the motion control family of products is developed around the 0-90 TYPE SE worm gear product. These are: D S-ELIMINATOR-This is an adjustable backlash product utilizing a Winsmith patented gear tech- nology. A maximum of 2 arc minutes of backlash can be maintained over the life of the product. Adjustment can be made without taking the product out of service.