PRECISION MOTION CONTROL Steven Engineering

Precision Motion Control Steven Engineering-Free PDF

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Introduction to Spring Engaged Brakes 1,Profile Guide Rail Brakes 2. Rod Locks 3,Servomotor Brakes 4,Ball Screw Brakes 5. Flange Mounted Brakes 6,Shaft Mounted Brakes 7,Caliper Brakes 8. Flange Mounted Clutch Brakes 9,Spring Engaged Tooth Clutches 9. IMPORTANT NOTICE Nexen recommends regular inspection of the spring engaged brake s holding. force and suggests the installation of a sensor integrated into the control system to detect engagement and. disengagement, Nexen expects spring engaged products to be used correctly and is not responsible for injuries damages and.
operational malfunctions if, The product s User Manual instructions are ignored or neglected. The brakes are used inappropriately,The brakes are modified. The brakes are handled operated or maintained incorrectly. A proper service factor was not used, Spring engaged brakes are used in high cycle applications that can fatigue the engagement springs or. cause breakage reducing the braking or holding force. Redundant and backup systems are recommended particularly if there is potential risk of loads falling in vertical. axes where personnel might be endangered Redundant systems are typically two brakes working independent. of each other and are capable of stopping and holding the load individually if one or the other fails to engage. Nexen offers reliable solutions for,braking holding applications. Courtesy of Steven Engineering Inc 800 258 9200 sales steveneng com www stevenengineering com. INTRODUCTION TO SPRING ENGAGED BRAKES, Nexen continues to work closely with major manufacturing organizations that want to reduce the risk of harm to.
people equipment or the environment that may arise from the operation of a section of production equipment. An intelligent risk reduction strategy protects personnel machines and the environment increases productivity. improves efficiency and increases uptime The result of these partnerships is a growing range of spring engaged. air released brakes and linear clamping elements, Studies in Europe and Japan show that most robot accidents do not occur under normal operating conditions. but rather during programming maintenance repair and testing Adequate safety measures are therefore. required to prevent loads from falling or axes from moving when performing maintenance tasks or partially. powering up the equipment, Even in purely horizontal movements many systems utilize brakes to prevent coasting during machine stops. triggered by the opening of a movable guard or other safety barrier. Nexen offers the most dependable technology available for E Stop and holding applications High holding force. and zero or low backlash provide accurate positioning and increased stiffness of equipment resulting in higher. quality end products, Nexen s spring engaged air released brakes are much more energy efficient than electric products They only. use about 1 2 watts to power the pneumatic control valve versus at least 100 times more for the power supply. and magnetic coils electric brakes require when being held in their released state. The electric coils also saturate the electric brake with heat while released reducing it s ability to stop a load due. to brake fade Heat also degrades the winding insulation bearing seals and lubrication and the facing material. reducing brake life, Air released brakes if they ever need servicing can be rebuilt very economically vs electrically released brakes. that usually are not cost effective to rebuild saving you money and reducing the environmental impact. These benefits give you a better performing brake that improves your processes and lowers the cost of ownership. A wide range of options with consistent performance means Nexen has a braking solution for most new or. retrofit applications Regardless of the application count on Nexen to offer high performance stopping and. holding products with these great features,Short stopping distance.
Low energy consumption,High stopping holding torque or linear force. Fastest response,High heat absorption capacity,No displacement when locking unlocking. Zero or low backlash,Easy integration,Varies with model. NEXEN S SPRING ENGAGED BRAKE SOLUTIONS INCLUDE,Profile Guide Rail Brakes Shaft Mounted Brakes. Rod Locks Caliper Brakes,Servomotor Brakes Tooth Interface Devices.
Ball Screw Brakes Spring Engaged Brake Air Engaged Clutch. Combinations,Flange Mounted Brakes, Courtesy of Steven Engineering Inc 800 258 9200 sales steveneng com www stevenengineering com. PROFILE GUIDE RAIL BRAKES, Nexen s RB rail brake series offers holding and E stop capability in. power off situations Rail brakes clamp onto the center of profile guide. rails to provide positive braking and holding in all axes without touching the. bearing surface of the rail High holding force and very low backlash make. it ideal for accurate position holding where drive train backlash or lack of. rigidity could allow excessive movement, Available for profile guide rail sizes 15 20 25 30 35 45. Spring engaged air released,Static holding force from up to 585 lbs 2 600 N. Low backlash 0 004 0 200 in 0 10 0 2 mm,Fast engagement 0 049 0 080 seconds.
Fits guide rails from companies like THK NSK IKO Hiwin INA SKF Star and Schneeberger. Does not contact and bearing raceways so has no impact on guide rail life. Brake body geometry matches the guide rail bearings making design and installation easier. Rail brakes can hold the load in position while failed reducers or motors are replaced. Suitable for infrequent dynamic E stops,Brake shoe gap is adjustable. Brake shoes are user replaceable, Large brake shoe guide rail contact area for consistent performance and low wear. Two internal independent braking mechanisms for redundancy. Can be stacked for higher holding forces, About 1 2 watts of energy consumption while released. Can provide redundant braking to brake motors, Can allow smaller drive systems to position the load and then the rail brake holds position while high force. operations are performed that would over power the drive system. Maintenance free, Nexen s RBR rail brake roller is a cost effective light weight solution for.
holding applications on guide rail systems The unique design uses a. horizontal air spring chamber to apply force on the rail through a wedge and. roller mechanism,Available for profile guide rail sizes 20 30 35. APPLICATIONS,Power off Stopping Holding,Accurate Position Holding. Courtesy of Steven Engineering Inc 800 258 9200 sales steveneng com www stevenengineering com. Nexen RL rod locks provide incredible holding force on NFPA and ISO cylinders. and precision rods in a small package Their internal clamping collar spreads. the clamping load over a large area on the rod ensuring it doesn t damage. it and gives a long life Very low backlash and no rod displacement when. engaging disengaging allows accurate positioning Optional manual release. allows rod movement without air pressure and engagement disengagement. sensor provides lock mode feedback in critical applications. 16 sizes available, Static holding force from 180 8560 lbs 890 38 077 N. Low backlash 0 002 0 008 in 0 05 0 20 mm,Fast engagement 0 030 0 115 sec. Holding forces exceed cylinder extending force at 100 psi 6 9 Bar. 60 psi release, Same holding force in both directions In vertical applications multiple.
rod locks can be stacked to, Sizes for most ISO and NFPA pneumatic cylinder brands. obtain a higher holding force,More compact than competitive models. Stand alone versions with dual guide bearings and seals for precision guide rod. applications, Anodized aluminum housing for corrosion resistance. No rod displacement during lock engagement disengagement. Suitable for infrequent dynamic E stops, Multiple springs assure reliable performance even if one spring breaks. Rod locks can be stacked to increase the holding force on a single guide rod. Sensor for engaged disengaged feedback, Manual release models default to the locked position.
Accepts standard air cylinder accessories like seals. scrapers and mounting brackets, Large locking collar rod contact area for consistent performance low wear. Rated for at least 1 000 000 cycles,IP67 rated exceeds NEMA 4X. Complies with ISO 6431 standards, About 1 2 watts of energy consumption while released. Maintenance free,Nexen s cylinder mounted Rod Locks match the. cylinder profile for easy compact integration,APPLICATIONS.
Accurate Position Holding,Power Off Stopping Holding. Courtesy of Steven Engineering Inc 800 258 9200 sales steveneng com www stevenengineering com. SERVOMOTOR BRAKES, Nexen s servo motor brake is designed to mount to the shaft end of. servomotors up to 20 horsepower The brakes input and output features can. be the same or different allowing it to act as an adapter between dissimilar. mounting features The input end bore accepts the motor shaft and is fixed. inside the brake with a split hub shaft collar arrangement With higher torque. and durability than other braking options and true zero backlash and high. rididity so drive system accuracy is not effected, Seven sizes to fit servomotors up to 20 horsepower. Models available for NEMA 23 34 and 42 frame sizes. Mounts on the output flange of a servomotor, Output shafts and flanges can match the motor reducer flanges and shafts or can differ. and act as an adapter between different motor reducer mounting features. Shaft bore sizes from 0 250 1 980 in 6 4 48 mm, Models for most motor gear head combinations others upon request.
Speeds up to 10 000 RPM,True zero backlash, Minimum static torque from 20 1100 in lbs 2 25 125 Nm. At least 50 more torque than competitive add on electric servo brakes. Unlike servo brake motors is capable of stalling the servomotor. Can withstand repeated E Stops that destroy other servo brakes or brakemotors. Low inertia,High torsional rigidity, Servomotor can be replaced while brake holds the load in place. Meets IP67 dust and waterproof standards, Can serve as a redundant or secondary brake to a brake motor. Very low energy consumption while released unlike electric brakes. Maintenance free,APPLICATIONS,Accurate Position Holding. Power Off Stopping Holding, Courtesy of Steven Engineering Inc 800 258 9200 sales steveneng com www stevenengineering com.
BALL SCREW BRAKES, Nexen s Ball Screw Brakes provide reliable holding in a compact package. overcoming a common problem found in vertical ball screw applications. During a power loss the motor has no holding torque allowing the ball. screw to back drive and the load to drop Even when a brake motor is used. the brake tends to be weak and doesn t withstand many E stops before. failing Ball Screw brakes connect to the machined end of a ball screw to. prevent back driving load drops and equipment damage even if the motor. or reducer fails,Five models with torque up to 1100 in lbs 125 Nm. Speeds up to 10 000 RPM,True zero backlash,Low inertia. High torsional rigidity, Directly couples to the machined non driven end of a ball screw. Uses a coupling that allows axial displacement due to ball screw thermal. Meets IP67 dust and waterproof standards, Prevents ball screw back drive and load drops in vertical applications.
Can serve as a redundant or secondary brake to a brake motor. Can support loads or maintain position while failed reducers or motors are. Very low energy consumption while released unlike electric brakes. Maintence free,APPLICATIONS,Accurate Position Holding. Power Off Stopping Holding, Courtesy of Steven Engineering Inc 800 258 9200 sales steveneng com www stevenengineering com. FLANGE MOUNTED BRAKES, Nexen has several flange mount spring engaged brake designs These. are mounted directly on NEMA and IEC flanged motors and or gearboxes. The SE and FMBES models can also be foot mounted with input shafts. EMB Brakes,Specifications Key Features,5 Sizes NEMA 56 256 TC. Zero Backlash Holding,4 Sizes IEC 71A 132S Fast Response.
Holding Torque 400 1100 in lbs 45 124 Nm Totally Enclosed. Low Inertia,Release Pressure 40 80 psi 580 1160 bar. Specifications Key Features,Sizes 5 sizes,Manual Release. Shaft Diameters 0 625 1 375 in 15 8 34 9 mm Low Inertia. Holding Torque 100 2000 in lbs 11 226 Nm Easy Facing Replacement. Release Pressure 30 50 psi 435 725 bar,FMBES Brakes. Specifications Key Features,Sizes 6 sizes Long Friction Facing Life. Shaft Diameters 0 625 1 375 in 15 8 34 9 mm Enclosed Nickle Plated Design. Manual Release, Holding Torque 100 900 in lbs 11 102 Nm 3 to 15 Springs.
Release Pressure 30 60 psi 435 870 bar IP 54 Rated. APPLICATIONS,Power Off Stopping Holding,Accurate Position Holding. Courtesy of Steven Engineering Inc 800 258 9200 sales steveneng com www stevenengineering com. SHAFT MOUNTED BRAKES, Nexen spring engaged shaft mount brakes are a self contained package. easy to install and service, They provide high dynamic torque and their ventilated discs can handle a. lot of heat making them ideal as emergency stopping brakes Long facing. life ensures low maintenance with little down time. SSE TSE Brakes,Specifications Key Features,Sizes 6 sizes. Ventilated Discs, Shaft Diameter up to 3 500 in 88 9 mm Long Friction Facing Life.
Holding Torque 450 8000 in lbs 51 904 Nm Easy Facing Replacement. Nexen expects spring engaged products to be used correctly and is not responsible for injuries damages and operational malfunctions if he product s User Manual instructions are ignored or neglected T he brakes are used inappropriately T he brakes are modified T he brakes are handled operated or maintained incorrectly T

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