friction clutches - Arten Freios e Embreagens Industriais

More documents

Recommendations

Info

Table of Contents◗TENSION CONTROLSDimensionsMB41Web ProductsMB SERIES TENSION SENSORSSizingTwo factors affect SensorSizing. The sensor must beable to measure the Force (F)created by the Web Tension (T)wrapping the roll at given angle.The sensor must also supportthe tare weight of the sensingroll and bearings. These twofactors are independent of oneanother and must be calculatedseparately.Force CalculationLoad range per sensor (seespec. chart next page ) is Fdivided by the number of pointssupporting the load, i.e. twosupport points in bilateral,Unilateral or Cantileveredconfiguration, or one supportpoint in Narrow Web or Wireand Filament configuration.Tare per sensor (see spec.chart next page) is calculatedthe same way. The tare persensor is the total weight of thesensor roll and the bearingsdivided by the number ofsupport points.InstallationSensor ConfigurationBilateral - Standard arrangementused on most machines.Sensing tension on both endsprovides maximum sensitivityand eliminates sensing errorsdue to tension variation fromedge to edge.Unilateral - More economicalsensing method. Not recommendedfor webs over 14 inches(355,6mm) wide or on machineswhere the web is run off center.WarningTare capacity can decreaseby up to 50% when sensorsare mounted vertically or atan angle (see items B and Dunder “Sensor Mounting”next page). Reduce tare persensor rating in spec. chart by50% or contact the factory.Narrow Web - Useful onnarrow web machines. Shouldnot be used where roll faceexceeds six inches.Cantilevered Rolls - MBSensor mounted on supportbracket to machine frame.300Contact Nexen or your Nexendistributor or representative ifyou have any question aboutsensor sizing.Wire or Filament- Similar to narrow web style.For tension in excess of 2 lbs.(0,09 kg).For tensions less than twopounds multiply the force withleverage. F=2T(Y/X)
Table of ContentsSensor MountingMounting dimensions for the five framesizes are given on previous pages.Sensors may be mounted at any angle(see Figures A-D).All sensors include a 16 ft. (5M) cablewhich may be extended with 18 AWG 4conductor shielded cable to as long as500 ft. (152M). Presized, Extension Cablesare also available. (see Page 298).Web ProductsMB SERIES TENSION SENSORSFigure A B C DTENSION CONTROLS ◗All sensors must be mounted accordingto the following guidelines:1. Flatness must be 0.002” (0.05 mm) over thelength of the sensor. This can be achievedby milling of the mounting surface.NOTE: Any shimming required for sensorroll leveling must be done between sensorand pillow block. Never shim betweensensor and sensor mounting surface.2. Sensor roll span must equal sensorspan. This is achieved by securing thesensor to the mounting surface, then thepillow block bearings to the sensors, andfinally the bearings to the sensor roll shaft(see Fig. E).3. When sensors are mounted to a base ofmaterial different than that of the sensorroll, i.e. aluminum roll, steel mounting base;secure only one pillow block bearing to theroll shaft. This will allow for different ratesof thermal expansion (see Fig. E).4. Mounting surfaces must be parallel.Self centering pillow block bearings arerequired to take up any variations inparallelism (see Fig. F).Figure EFigure FFigure GMB IIFigure HMB 25NOTE: Noncompliance with these conditionswill induce heavy side loads withinthe sensor. This will cause hysteresis, andthe sensor will measure mechanicalresistance rather than tension load.MB 05, MB II and MB 25 onlyMB05 is normally mounted using the sidemounting plate and cap screws providedwith the unit.MB II and MB 25 may be mounted oncustomer supplied wall mounting brackets .(See figures G & H).All three sizes may be mounted for eithernormal or reverse web wrap. The tensioninduced force (F) is calculated the same inboth cases and the allowable load range persensor (see chart page 3) does not change.MB 33 and MB 41Due to the high forces generated by websneeding MB 33 and 41 load cells, reversewrap is not recommended.Due to the high forces generated, side wallmounting is not recommended.Contact Nexen or your Nexen distributoror representative if you have any questionabout sensor sizing.InstallationSensor LocationCorrect LocationFigure (3) illustrates correct sensorlocation for winding or unwinding control.One transport roll (A) located between thesensors and roll stand serves to fix theweb angle over the sensor roll.Figure (4) illustrates angular changes asthe roll changes diameter during processing.Incorrect LocationThese angular changes will cause incorrectreadings from the Tension sensors and mustbe avoided by use of roll (A) (see Fig. 3).Figure (5) illustrates a common mistake insensor mounting. In this configuration, the“S” wrap drive will effectively isolate tensioninto two zones, T 1 and T 2 . A nip roll at thesame position would provide the sameisolation. The roll stand brake or clutchcan only control tension in T 1 zone. Sincethe sensors are mounted in the T 2 zone,they can not sense any tension changescaused by the roll stand and can not beused for closed loop control. The sensorsmust be moved to position “A” for propercontrol of the roll stand and T 1 tension.Contact Nexen or your Nexen distributoror representative if you have any questionabout sensor sizing.301
Page 1:
Table of ContentsPRODUCTCAT ALOG10-
Page 4 and 5:
Table of Contents◗PRODUCT NUMBER
Page 6 and 7:
Page 8:
Page 12 and 13:
Table of Contents◗FAMILY OF PRODU
Page 16:
Page 19:
Table of Contents“Air Champ” ®
Page 24:
Table of Contents◗APPLICATION GUI
Page 27 and 28:
Table of ContentsWeb ProductsGUIDE
Page 29 and 30:
Page 31 and 32:
Table of Contents◗ MICRO FRICTION
Page 33 and 34:
Page 35 and 36:
Page 37 and 38:
Page 39 and 40:
Page 41 and 42:
Page 43 and 44:
Page 45 and 46:
Page 47 and 48:
Page 49 and 50:
Page 51 and 52:
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
Table of Contents◗“Air Champ”
Page 59 and 60:
Page 61 and 62:
Page 63 and 64:
Page 65 and 66:
Page 67 and 68:
Page 69 and 70:
Table of ContentsWeb ProductsIn acc
Page 71 and 72:
Table of ContentsWeb ProductsTENSIO
Page 73 and 74:
Table of ContentsWeb ProductsHousin
Page 75 and 76:
Page 77 and 78:
Page 79 and 80:
Page 81 and 82:
Page 83 and 84:
Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Page 93 and 94:
Page 95 and 96:
Page 97 and 98:
Page 99 and 100:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Table of Contents◗ AIR PRESSURE C
Page 113 and 114:
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Page 121 and 122:
Page 123 and 124:
Page 125 and 126:
Page 127 and 128:
Table of ContentsEclipse SERVOMOTOR
Page 129 and 130:
Table of ContentsEclipse SERVOMOTOR
Page 131 and 132:
Table of ContentsEclipse LINEAR MOT
Page 133 and 134:
Table of ContentsEclipse NEMA AC MO
Page 135 and 136:
Table of ContentsEclipse METRIC AC
Page 137 and 138:
Table of Contents◗ BW MODEL BRAKE
Page 139 and 140:
Page 141 and 142:
Page 143 and 144:
Page 145 and 146:
Page 147 and 148:
Page 149 and 150:
Page 151 and 152:
Page 153 and 154:
Page 155 and 156:
Page 157 and 158:
Page 160 and 161:
Table of Contents◗CALIPER BRAKES
Page 162 and 163:
Page 164 and 165:
Page 166 and 167:
Page 168 and 169:
Page 170 and 171:
Table of Contents◗CALIPER BRAKESS
Page 172 and 173:
Page 174 and 175:
Page 176 and 177:
Table of Contents◗DRUM BRAKES“A
Page 178 and 179:
Table of ContentsDRUM BRAKES “Air
Page 180 and 181:
Table of ContentsDRUM BRAKES “Air
Page 182 and 183:
Table of Contents◗HEAVY DUTY BRAK
Page 184 and 185:
Page 186 and 187:
Page 188 and 189:
Page 190 and 191:
Page 192 and 193:
Table of Contents◗METRIC BRAKES
Page 194 and 195:
Page 196 and 197:
Page 198 and 199:
Table of Contents◗BRAKESWeb Produ
Page 200 and 201:
Table of Contents◗TENSION CONTROL
Page 202 and 203:
Page 204 and 205:
Page 206 and 207:
Page 208 and 209:
Page 210 and 211:
Page 212 and 213:
Page 214 and 215:
Page 216 and 217:
Page 218 and 219:
Page 220 and 221:
Page 222 and 223:
Table of Contents◗CLUTCH/BRAKES
Page 224 and 225:
Page 226 and 227:
Page 228 and 229:
Table of Contents◗CLUTCH/BRAKESFM
Page 230 and 231:
Page 232 and 233:
Page 234 and 235:
Page 236 and 237:
Page 238 and 239:
Page 240 and 241:
Page 242 and 243:
Page 244 and 245:
Page 246 and 247:
Page 248 and 249:
Page 250 and 251: Table of Contents◗CLUTCH/BRAKES
Page 252 and 253: Table of Contents◗CLUTCH/BRAKESA
Page 264 and 265: Table of ContentsCLUTCH/BRAKES “A
Page 272 and 273: Table of Contents◗METRIC CLUTCH/B
Page 292 and 293: Table of Contents◗TENSION CONTROL
Page 318 and 319: Table of Contents318
Page 320 and 321: Table of Contents◗WEB GUIDING CON
Page 336 and 337: Table of Contents◗WEB AUXILLARY C
Page 342 and 343: Table of Contents◗CONTROLS“Air
Page 350 and 351:
Table of Contents◗CONTROLS“Air
Page 352 and 353:
Table of Contents◗REPAIR KITS“A
Page 354 and 355:
Page 356 and 357:
Page 358 and 359:
Page 360 and 361:
Table of Contents◗APPLICATION ENG
Page 362 and 363:
Page 364 and 365:
Page 366 and 367:
Page 368 and 369:
Page 370 and 371:
Page 372 and 373:
Table of Contents◗FUNCTION EXAMPL
Page 374 and 375:
Page 376 and 377:
Page 378 and 379:
Page 380 and 381:
Page 382 and 383:
Page 384 and 385:
Page 386:
show all

friction clutches - Arten Freios e Embreagens Industriais

Create successful ePaper yourself

Delete template?

Save as template?