SEW BrakesSEW Brakes - SEW‑EURODRIVE
SEW BrakesService and MaintenanceSEW-EURODRIVE—Driving the world
Product Training2Objectives Upon completion of this session, you will be able to dothe following:- Identify the components of an SEW brakemotor- Explain the operation of the SEW brakemotor- Apply basic troubleshooting proceduresSEW-EURODRIVE—Driving the world
Product Training3Brake Purpose To Stop Motion- The brake engages when power is removed from the motor- The brake applies force to an object in motion until frictioneither slows or stops the motion.- Motor slows and finally stops To Prevent Motion- Brake engages after motor has cometo complete stop- Brake merely holds motor to preventrotation.SEW-EURODRIVE—Driving the world
Product Training4Brake Features SEW features:– Fail-safe operation– Rectifier for conversion of AC into DC current– DC controlled brake coilWithout a fail-safe brake,whath wouldld happenhtomachinery in the event ofa power loss?Wh t aboutWhatb t theth product?d t?SEW-EURODRIVE—Driving the world
Product Training5Brake Operation Coil functions like an electromagnet when energizedBrake CoilSEW-EURODRIVE—Driving the world
Product Training6Brake OperationDe-energizedEnergizedWhen the coil is de-energized, thespringsp g applypp y force to thestationary plate.When the coil is energized, itsmagnetic field pulls the platetowards the coil.This force presses against thebrake disc to create friction.The magnetic force compressesthe springs.Friction stops the motor and/orprevents it from rotating.The motor can now rotate freely.VIDEOSEW-EURODRIVE—Driving the world
Product Training7Brake Operation Coil:- The brake coil actually consists of two separate parts: anAccelerator coil (BS) and a Fractional holding coil (TS).- An SEW brake rectifier controls both coils.FractionalAcceleratorBrake CoilSEW-EURODRIVE—Driving the world
Product Training8Brake Operation Step 1- Initially, the rectifier energizes the Accelerator (BS) coil veryquickly, due to its low resistance.Low resistance High CurrentHigh Current Strong ElectromagnetismStrong Electromagnetism Fast —Driving the world
Product Training9Brake Operation Step 2- After 120 ms, the rectifier energizes both coils. Combined coilshave a higher resistance, allowing the coils to de-energizede energize fasterwhen power is removed.High resistance Low CurrentLow Current Weak ElectromagnetismWeak Electromagnetism Quick Coil —Driving the world
Product Training10Brake Operation Step 1RectifierBrakeMotorInputPower SStepep 2 – 120ms0 sSEW-EURODRIVE—Driving the world
Product Training11Brake Operation Starting1. The rectifier energizes the brake coil.2. The brake coil attracts the stationary disc, removing pressurebetween stationary disc and brake disc.3. Motor rotates freely. Stopping1. Rectifier de-energizes the coil.2. Brake springs create pressure between stationary disc andbrake disc.3. Friction stops motor and prevents it from rotating.SEW-EURODRIVE—Driving the world
Product Training12Brake ComponentsBrake Disc (rotates)Air GapSpringBrake End ShieldBrake Carrier((rotates))Brake CoilCoil BodyBrake Rotor Shaft(rotates)Stationary Disc(moves)Dampening Plate(BMG only)SEW-EURODRIVE—Driving the world
Product Training13Brake E—Driving the world
Product Training14Brake Components Rectifiers and relays that mount in Motor Conduit BoxSEW-EURODRIVE—Driving the world
Product Training15Brake Components Rectifiers that mount in Control PanelSEW-EURODRIVE—Driving the world
Product Training16Brake Components Typical wiring diagramSEW-EURODRIVE—Driving the world
Product Training17Troubleshooting Troubleshooting an SEWbrakeSEW-EURODRIVE—Driving the world
Product Training18Troubleshooting Always follow the properlockout/tagout procedures. Use the proper safetyequipment at all timesSEW-EURODRIVE—Driving the world
Product Training19Troubleshooting Resources needed- Nameplate data from motor- Brakemotor operating instructions- Motor/Brakemotor parts list- Digital multi-meterSEW-EURODRIVE—Driving the world
Product Training20Troubleshooting Possible Faults- RectifierR tifi iis ddamaged.d- Rectifier is wired incorrectly.- AC brake voltage is incorrect or not applied.- Brake coil is damaged or malfunctioningmalfunctioning.- Brake is mechanically locked.- Air gap is outside of tolerance.- Brake disc is worn or damageddamaged.FAULT.SEW-EURODRIVE—Driving the world
Product Training21Troubleshooting Brake rectifier is damaged- Incorrect voltageg or wiringg of the rectifier causes internal orexternal damageRectifier receivedincorrect voltageComponents aredamagedSEW-EURODRIVE—Driving the world
Product Training22Troubleshooting Rectifier is wired incorrectly.- Refer to nameplate for correct type ofconnection (Conn Dia)- Refer to the operating instructions for wiringdiagramsSEW-EURODRIVE—Driving the world
Product Training23Troubleshooting AC brake voltage is incorrect or not applied- Refer to nameplate for correct brake voltage460 ACAC Voltage that should beappliedppto the brake rectifierSEW-EURODRIVE—Driving the world
Product Training24Troubleshooting Check voltage at brake contactor- If rectifier ppower does not come from motor terminals,, measurethe voltage at the brake contactor Check the activation of the brake contactor- Verify that the brake contactor functions properly and changesposition when energizedSEW-EURODRIVE—Driving the world
Product Training25Troubleshooting Brake coil is damaged or malfunctioning- Wrongg voltageg appliedppto brake coil causes internal andexternal damageCo receivedCoilece edwrong voltageSEW-EURODRIVE—Driving the world
Product Training26Troubleshooting Obtain normal coil resistancesLook up the correct values in the SEWBrakemotor Operating Instructions.SEW-EURODRIVE—Driving the world
Product Training27Troubleshooting Measure the actual resistances of accelerator coil andfractional coil14-white w/blue stripe15-blue13-14 (accelerator coil)14 15 (fractional coil)14-1513-15 (total coil)13-redAccelerator coil windingg resistance ¼ of windingg resistanceFractional coil winding resistance ¾ of winding resistanceTotal coil winding resistance sum of accelerator and holding coil resistanceSEW-EURODRIVE—Driving the world
Product Training28Troubleshooting Brake is mechanically locked- Verify the free play on the releasearm. Loosen the locking nuts asneeded to achieve 1.5 – 2.0 mmgap (S Dimension)gap.Caution!There must always be clearanceon the lever.Note: The brake releasemechanism is not used to changethe brakebrake’ss torque settingsetting.SEW-EURODRIVE—Driving the world
Product Training29Troubleshooting Air gap is outside of tolerance- Insufficient air ggapp between the dampeningpgpplate ((BMG brakes))and the brake coil. (For BM brakes, there is no dampeningplate, so air gap lies between stationary disc and brake coil).Air-gapSEW-EURODRIVE—Driving the world
Product Training30Troubleshooting Obtain correct value for air gap.Look up the correct values in the SEW Brakemotor Operating Instructions.SEW-EURODRIVE—Driving the world
Product Training31Troubleshooting Adjust the Brake Air Gap (Method 1)1.Insert feeler gauge betweendampening plate and coil(BMG) or between stationaryplate and coil (BM).2.Tighten (3) hex nuts until thereis minimal air gap (clearance)equally around the discAttention:When using a feeler gaugeon a BMG bbrake,k measurefrom a dimple on thedampening plate!SEW-EURODRIVE—Driving the world
Product Training32Troubleshooting Adjust the Brake Air Gap (Alternate Method 2)1. Tighten the three adjustment nuts equally to establish zero air gap1gap.2. Loosen the adjustment nuts according to the figures below.Degree offDRotationApproximateAi t RRotationt tiAmountBM(G)05, BM(G)1160 7/16 TurnBM(G)2, BM4135 3/8 TurnBM(G)8180 1/2 TurnBM15, BM30, BM31145 2/5 TurnBM32, BM62135 3/8 TurnBMG61, BMG122145 2/5 TurnBrake SizeNote: Chart is based on the middle air gap tolerance.However all SEW brakes fall within the air gap toleranceHowever,range if the degree of rotation is ½ turn.SEW-EURODRIVE—Driving the world
Product Training33Troubleshooting Brake disc is worn or damaged- Slidingg friction causes carbon-based brake disc to wear- High cycle rates require more frequent disc replacement- Overheating can cause stationary disc to warpCarboncompositematerialSEW-EURODRIVE—Driving the world
Product Training34Troubleshooting Check thickness of brake disc1.Measure the brake disc withcaliperslitto ddetermineti ththe actualt ldisc thickness.2.If the disc is below tolerance,replacelitit.3.If the disc is acceptable, reinstall itaccording to the parts list andoperating instructionsinstructions.SEW-EURODRIVE—Driving the world
Product Training35Review What are the components of an SEW brake?SHOW ME How does an SEW brake function?SHOW ME What possible faults could occur when an SEWbrake does not operate properly?SHOW MESEW-EURODRIVE—Driving the world
Product Training36Brake Operation Starting1. The rectifier energizes the brake coil.2. The brake coil attracts the stationary disc, removing pressurebetween stationary disc and brake disc.3. Motor rotates freely. Stopping1. Rectifier de-energizes the coil.2. Brake springs create pressure between stationary disc andbrake disc.3. Friction stops motor and prevents it from rotating.SEW-EURODRIVE—Driving the world
Product Training37Review What are the components of an SEW brake?SHOW ME How does an SEW brake function?SHOW ME What possible faults could occur when an SEWbrake does not operate properly?SHOW MESEW-EURODRIVE—Driving the world
Product Training38Brake ComponentsBrake Disc (rotates)Air GapSpringBrake End ShieldBrake Carrier((rotates))Brake CoilCoil BodyBrake Rotor Shaft(rotates)Stationary Disc(moves)Dampening Plate(BMG only)SEW-EURODRIVE—Driving the world
Product Training39Review What are the components of an SEW brake?SHOW ME How does an SEW brake function?SHOW ME What possible faults could occur when an SEWbrake does not operate properly?SHOW MESEW-EURODRIVE—Driving the world
Product Training40Troubleshooting Possible Faults- RectifierR tifi iis ddamaged.d- Rectifier is wired incorrectly.- AC brake voltage is incorrect or not applied.- Brake coil is damaged or malfunctioningmalfunctioning.- Brake is mechanically locked.- Air gap is outside of tolerance.- Brake disc is worn or damageddamaged.SEW-EURODRIVE—Driving the world
Motor Brake Input Power SEW-EURODRIVE—Driving the world. Product Training 10 Brake Operation Motor Brake Step 1 Rectifier Input Power SSeptep 2 – 1200sms SEW-EURODRIVE—Driving the world. Product Training 11 Brake Operation Starting 1. The rectifier energizes the brake coil. 2. The brake
SEW-EURODRIVE—Driving the world SEW-EURODRIVE Driving the world www.sew-eurodrive.com SEW-EURODRIVE GmbH & Co KG P.O. Box 3023 D-76642 Bruchsal/Germany Phone 49 7251 75-0 Fax 49 7251 75-1970 sew
SEW BrakesSEW Brakes Service and Maintenance SEW-EURODRIVE—Driving the world. Product Training 2 Objectives Upon completion of this session, you will be able to do the following: - Identify the compo
3 Principle of SEW Brakes SEW brake systems in detail 10 Drive Engineering – Practical Implementation – SEW Disk Brakes 3.3.2 BR03 brake The BR03 brake is used for size DR63 AC brakemotors. According to the BR principle, the brake
Products and systems from SEW-EURODRIVE for any application – worldwide. SEW-EURODRIVE products can be found in a variety of industries, e.g. automotive, building materials, food and beverage as well as metal-processing. The decision to use drive . – Manual b
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8 SEW-EURODRIVE Designation Inside measurements H x W x D (mm) Properties and use Type 06 215 x 565 x 365 Non-conductive container for manual handling, closed sides and botto
Jun 06, 2000 · Brake Connection (AC Voltage) SEW-Eurodrive motor brakes can be connected in a number of different ways. In order to connect the brake for each application, it is important to refer to the data on the motor nameplate that describes the brake system. The brake fields are: brake voltage, . Brake Motor ConnectionFile Size: 232KB
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