This book uses 521 examples to introduce the electrical fault diagnosis and treatment process of CNC lathes, CNC milling (boring) machines, CNC grinders, machining centers, and other CNC machine tools, targeting the electrical faults that often occur during the machining process of FANUC CNC machine tools. These fault examples are all from the front line of CNC machine tool use and maintenance, and are highly targeted and practical. The fault examples selected in this book are mainly distributed in the CNC system, PMC, power supply, spindle, servo feed axis, tool changer and other parts. Each example starts with the fault phenomenon, conducts logical analysis step by step, and gradually eliminates non-fault factors from the shallow to the deep, and finally finds the fault.The real cause of the fault is identified and dealt with accordingly. Preface Chapter 1 CNC System Faults 65 Examples Example 001 The lathe cannot start after power failure Example 002 The CNC milling machine cannot start after power failure Example 003 The machining program cannot be input Example 004 The machining program cannot be executed (1) Example 005 The machining program cannot be executed (2) Example 006 The machining program cannot be executed (3) Example 007 The lathe feed axis cannot move Example 008 The tool change action cannot be completed (1) Example 009 The tool change action cannot be completed (2) Example 010 The tool change action cannot be completed (3) Example 011 Machine tool parameters are incomplete Example 012 Feed value does not match the programmed value Example 013 Lathe spindle speed is too low Example 014 Spindle speed cannot be displayed Example 015 Can only move in the negative direction Example 016 Feed position error Example 017 Processing pitch is incorrect Example 018 X axis often runs away Example 019 X axis exceeds travel in the negative direction Example 020 Both axes exceed travel in the positive direction Example 021 Spindle cannot stop when jogging Example 022 Turret cannot return to zero position Example 023 Cannot return to the exact position Example 024 Cannot return to the reference point after power failure Example 025 All three axes cannot return to the reference point Example 026 Each axis cannot return to the reference point Example 027 Rough grinding Example 028 RAM test cannot pass Example 029 System execution speed slows down Example 030 The pallet cannot enter the specified position Example 031 Position error is greater than the set value Example 032 The two axes cannot return to the reference point Example 033 Creeping occurs when processing curves Example 034 The spindle rotates automatically Example 035 Moves automatically without command signal Example 036 Stops after working for more than ten minutes Example 037 The milling machine CRT has no display Example 038 The display interface cannot change Example 039 The display interface cannot be switched Example 040 Some garbled characters are displayed on the CRT Example 041 The CRT cannot communicate with the controller Example 042 An alarm occurs when returning to the reference point (1) Example 043 An alarm occurs when returning to the reference point (2) Example 044 An alarm occurs when returning to the reference point (3) Example 045 Three alarms occur simultaneously Example 046 Overtravel alarms occur on both axes Example 047 An alarm occurs when the C axis returns to zero Example 048 An alarm occurs before feeding starts Example 049 #2000 alarm occurs when the machine is turned on Example 050 #300 and #307 alarms appear Example 051 ALM923 alarm occurs Example 052 9999R202 alarm occurs Example 053 #910 alarm occurs after power-on Example 054 ALM930 alarm occurs after power-on Example 055 An alarm occurs after being idle for a period of time Example 056 #417 and #427 alarms are displayed Example 057 #501 overtravel alarm is displayed Example 058 #9999 alarm is displayed (1) Example 059 #9999 alarm is displayed (2) Example 060 #9999 alarm is displayed (3) Example 061 Display of \"NOTREADY\" alarm Example 062 Alarm #101 appears during machining Example 063 Alarm #131 appears during machining Example 064 Alarm #086 appears during communication Example 065 Alarm message \"Wrong name\" Chapter 2 PMC Fault 14 Examples Example 066 Unable to execute rotation command Example 067 Unable to execute tool change statement Example 068 Z axis does not move in various modes Example 069 Feeding when the spindle is not rotating (1) Example 070 Feeding when the spindle is not rotating (2) Example 071 Spindle suddenly stops and collides with tool Example 072 Spindle cannot be oriented and tool changed Example 073 Tool change cannot be performed when machining the next workpiece Example 074 Abnormal machining accuracy of Y axis Example 075 Tailstock ejector cannot retract Example 076 \"Tool chaos\" phenomenon often occurs Example 077 Multiple complex faults occur Example 078 Alarm #23 appears when changing tool Example 079 \"Not ready\" alarm appears Chapter 3 Power Fault 55 Examples Example 080 System power cannot be turned on (1) Example 081 The system power cannot be connected (2) Example 082 The system power cannot be connected (3) Example 083 The CNC lathe cannot start (1) Example 084 The CNC lathe cannot start (2) Example 085 The CNC lathe cannot start (3) Example 086 The CNC milling machine cannot start (1) Example 087 The CNC milling machine cannot start (2) Example 088 The machining center cannot start (1) Example 089 The machining center cannot start (2) Example 090 The CNC punching machine cannot start Example 091 Cannot restart after power failure Example 092 The system is in a \"freeze\" state Example 093 Has been in a waiting state Example 094 The milling machine suddenly stopped working (1) Example 095 The milling machine suddenly stopped working (2) Example 096 The machine suddenly stopped during processing (1) Example 097 The machine suddenly stopped during processing (2) Example 098 Sometimes the machine stops running suddenly Example 099 The workbench loses control Example 100 The milling machine vibrates violently Example 101 Violent vibration occurs after relocation Example 102 Spindle gear shifting often fails Example 103 No signal from the spindle gear switch Example 104 The Z axis is unable to rise Example 105 Cannot return to the reference point after power is turned on Example 106 The cooling motor is often overloaded Example 107 There is a \"squeaking\" sound during high-speed operation Example 108 The display screen is black (1) Example 109 The display screen is black (2) Example 110 The display screen is black (3) Example 111 A black screen suddenly appears during processing Example 112 The CRT interface is messy Example 113 The CRT interface suddenly disappears Example 114 The CRT cannot display any interface Example 115 The servo amplifier displays \"—\" Example 116 Displays #400 and #401 alarms Example 117 The #401 alarm appears on the CRT (1) Example 118 The #401 alarm appears on the CRT (2) Example 119#409 alarm appears frequentlyExample 120#950 alarm appearsExample 121#424 servo alarm appearsExample 122#910 and #930 alarms appearExample 123#930 alarm appears frequentlyExample 124Forward overtravel alarm appearsExample 125Overvoltage alarm appearsExample 126Overvoltage alarm appears on both axesExample 127Overcurrent alarm appears on Z axisExample 128Four alarms appear simultaneouslyExample 129CRT displays multiple alarmsExample 130Milling machine cannot start and alarmsExample 131#750 alarm appears during processingExample 132Alarm \"A\" is displayed on the main board Example 133 The driver displays AL-04 alarm Example 134 The position control board samples the alarm Chapter 4 Spindle (main component) failure 17 examples Example 135 The spindle cannot start after power failure Example 136 The spindle stops in the tool magazine and cannot move Example 137 The spindle speed change system is paralyzed Example 138 The spindle cannot run at high speed Example 139 The spindle speed fluctuates greatly Example 140 The spindle jitters when it stops when oriented Example 141 \"Stuck\" occurs during cutting Example 142 The display does not light up Example 143 CRT displays #409 alarm Example 144 #430 alarm appears frequently Example 145 #451 alarm appears during processing Example 146 #751 alarm appears after power on Example 147 #2009 alarm appears when changing tools Example 148 \"ERI\" alarm appears at start-up Example 149 Spindle overcurrent alarm (1) Example 150 Spindle overcurrent alarm (2) Example 151 Spindle overcurrent alarm and trip Chapter 5 Spindle (auxiliary component) failure 14 examples Example 152 Lathe spindle cannot start (1) Example 153 Lathe spindle cannot start (2) Example 154 Spindle cannot run forward and reverse Example 155 Spindle does not rotate after sudden power failure Example 156 Cannot execute automatic operation command Example 157 Neither the spindle nor the feed axis moves Example 158 All three axes cannot move Example 159 Cannot complete positioning action Example 160 Cannot perform normal indexing Example 161 Spindle speed cannot be increased Example 162 Spindle speed cannot be increased Example 163 \"Gnawing\" phenomenon occurs during processing Example 164 #911 alarm occurs during processing Example 165 AL-11 alarm is generated during braking Chapter 6 Spindle (feedback part) failure 30 examples Example 166 No action when executing G01 program (1) Example 167 No action when executing G01 program (2) Example 168 The working program stops halfway (1) Example 169 The work process was stopped midway (2) Example 170 The work process was stopped midway (3) Example 171 The spindle cannot run in the forward direction Example 172 The rotary table cannot rotate Example 173 The spindle of the lathe stops suddenly Example 174 The spindle cannot reach the command speed Example 175 The speed is too low when the spindle is oriented Example 176 The spindle cannot enter the high-speed gear Example 177 The spindle speed suddenly increases Example 178 The spindle is flying at high speed Example 179 Continuous rotation when executing the orientation command Example 180 The rotary table jitters Example 181 The specified tool position cannot be found Example 182 The tool is misaligned when inserted Example 183 The teeth are messy when turning threads Example 184 Cannot perform orientation stop Example 185 The spindle cannot be oriented when changing tools Example 186 The spindle lacks braking torque Example 187 The spindle oscillates greatly Example 188 There is a \"clang-clang\" noise in the spindle box Example 189 The spindle has multiple alarms Example 190 The spindle alarms as soon as it starts Example 191 The alarm occurs when the spindle starts and stops Example 192 The alarm occurs after running for more than ten seconds Example 193 The #409 alarm occurs during processing Example 194 #409 alarm occurs during boring Example 195 The spindle stops and #1000 alarm occurs Chapter 7 Spindle (other parts) failure 28 Examples Example 196 The machining center spindle does not rotate (1) Example 197 The machining center spindle does not rotate (2) Example 198 The spindle and other axes do not move Example 199 Cannot execute forward and reverse commands Example 200 Cannot execute thread turning commands Example 201 Suddenly stops during boring Example 202 The spindle suddenly stops Example 203 The spindle cannot complete orientation Example 204 The spindle cannot be accurately oriented Example 205 The spindle has an orientation error Example 206 The spindle speed cannot be changed Example 207 The spindle cannot shift gears continuously Example 208 The spindle box cannot change gears Example 209 The spindle does not rotate in high gear Example 210 The spindle orientation cannot be stopped Example 211 The tool change action stops automatically Example 212 Stops after the tool change point No action Example 213 Unable to reach the specified speed Example 214 The robot is stuck and cannot change the tool Example 215 The turntable is obviously misaligned when it falls Example 216 The spindle collides when changing the tool Example 217 The spindle vibrates when rotating Example 218 The spindle oscillates near the orientation position Example 219 The spindle cannot be oriented and an alarm is sounded Example 220 Alarm #2 appears on the PCB Example 221 Alarm #12 appears in the spindle system Example 222 Alarm #451 appears during positioning Example 223 Spindle intermittent overcurrent alarm Chapter 8 Servo (Main Component) Failure 54 Examples Example 224 The system is in emergency stop state (1) Example 225 The system is in emergency stop state (2) Example 226 The system is in emergency stop state (3) Example 227 The power cannot be turned on again after a sudden power failure Example 228 Reverse feed suddenly stops Example 229 The U axis cannot move during cutting Example 230 The processing dimension error is large Example 231 The dimension of the X axis is unstable Example 232 The error of the X axis exceeds the allowable range Example 233 There is an irregular error in the Y axis Example 234 There is a deviation in the dimension of the Z axis Example 235 The following error is greater than the specified value Example 236 The processing hole spacing is inaccurate Example 237 The current of the Z axis motor is too large Example 238 The robot J4 axis automatically slides down Example 239 The X axis motor runs at an overspeed Example 240 The X axis has high-frequency oscillation Example 241 The Y axis has intermittent movement Example 242 The Y axis vibrates during processing (1) Example 243 The Y axis vibrates during processing (2) Example 244 Irregular jitter of the Z axis Example 245 Vibration and electric current sound after shutdown Example 246 Violent oscillation after working for a while Example 247 Impact sound when returning to zero point Example 248 Overtravel alarms appear on all axes Example 249 \"S03-Z\" alarm appears Example 250 TGLS alarm appears Example 251 \"TG\" alarm appears on the Z axis Example 252 CRT displays SV003 alarm Example 253 CRT displays SV011 alarm Example 254 CRT displays SV013 alarm Example 255 #31 alarm appears on the CRT (1) Example 256 #31 alarm appears on the CRT (2) Example 257 #37 alarm appears on the CRT (1) Example 258 #37 alarm appears on the CRT (2) Example 259 CRT displays ALM401 alarm Example 260 Displays ALM411 and ALM414 alarms Example 261 Displays ALM440 and ALM443 alarms Example 262 Seven alarms appear at the same time Example 263 Servo motor overload alarm Example 264 #414 alarm appears during processing (1) Example 265 #414 alarm appears during processing (2) Example 266 #414 alarm appears during processing (3) Example 267 #414 alarm appears during processing (4) Example 268 #414 alarm appears during processing (5) Example 269 #400 and #401 alarms appear Example 270 #401 and #414 alarms appear (1) Example 271 #401 and #414 alarms appear (2) Example 272 #410 and #414 alarms appear (1) Example 273 #410 and #414 alarms appear (2) Example 274 The #434 alarm appears frequently Example 275 The #431 and #434 alarms appear Example 276 The HC and TG servo alarms appear Example 277 The driver displays DC and TG alarms Chapter 9 Servo (auxiliary component) failure 30 Examples Example 278 The next program segment cannot be executed Example 279 The Y axis cannot feed in the positive direction Example 280 The Y axis reverse feed sometimes stops Example 281 The Z axis feed speed is unstable Example 282 The reference point position is unstable (1) Example 283 The reference point position is unstable (2) Example 284 The X axis cannot return to the reference point (1) Example 285 The X axis cannot return to the reference point (2) Example 286 The Y axis cannot return to the reference point (1) Example 287 The Y axis cannot return to the reference point (2) Example 288 The Z axis cannot return to the reference point (1) Example 289 The Z axis cannot return to the reference point (2) Example 290 The Y axis cannot find the reference point Example 291 No deceleration when returning to the reference point Example 292 Inaccurate position when returning to the reference point Example 293 Cannot return to the reference point after being idle Example 294 Emergency stop when returning to the reference point Example 295 The X axis exceeds the stroke in the positive direction Example 296 The Z axis exceeds the stroke in the negative direction Example 297 There is a large error in the workpiece diameter Example 298 The tool change position changes frequently Example 299 The worktable has obvious jitter Example 300 The display suddenly goes out during processing (1) Example 301 The display suddenly goes out during processing (2) Example 302 Overcurrent alarm on X axis Example 303 Overtravel alarm on positive side of Z axis Example 304 Alarms ALM403 and ALM441 are displayed Example 305 Alarm occurs after the workbench is removed Example 306 Alarm occurs when A axis rotates Example 307 Milling machine cannot start and there is no alarm Chapter 10 Servo (Feedback Part) Failure 52 Examples Example 308 B axis rotation cannot be stopped Example 309 Oscillation occurs during high-speed feeding Example 310 \"Tool planting\" phenomenon occurs on X axis Example 311 Position deviation is greater than the set value Example 312 Processing dimension changes irregularly Example 313 All processed workpieces are scrapped Example 314 Moving dimension deviates from the set value Example 315 Periodic vibration marks appear on the workpiece surface Example 316 The speed of returning to the reference point is very slow Example 317 Zero drift often occurs Example 318 X axis speed fluctuates (1) Example 319 X axis speed fluctuates (2) Example 320 X axis vibrates during feeding (1) Example 321 X axis vibrates during feeding (2) Example 322 The X-axis vibrates irregularly Example 323 The Y-axis vibrates violently Example 324 Vibrates violently during processing Example 325 Vibrates during forward motion Example 326 High-speed operation as soon as the power is turned on Example 327 The turret loses control during rotation Example 328 The display shows the #411 alarm (1) Example 329 The display shows the #411 alarm (2) Example 330 The #351 alarm appears during processing (1) Example 331 The #351 alarm appears during processing (2) Example 332 The #416 alarm appears during processing (1) Example 333 The #416 alarm appears during processing (2) Example 334 The #510 overtravel alarm appears (1) Example 335 The #510 overtravel alarm appears (2) Example 336 The #510 overtravel alarm appears (3) Example 337: #521 overtravel alarm appears Example 338: ALM091 alarm appears when returning to zero point Example 339: Soft limit overtravel alarm appears Example 340: SERVO-062 alarm appears Example 341: ALM091 alarm appears Example 342: B axis cannot rotate and alarm appears Example 343: Y axis speed is too fast and alarm appears Example 344: Shutdown and #401 alarm appears Example 345: #300 alarm appears after shutdown Example 346: #05 and #07 alarms are displayed (1) Example 347: #05 and #07 alarms are displayed (2) Example 348: #05 and #07 alarms are displayed (3) Example 349 Display \"424YSERVO\" alarm Example 350 Servo system alarm #319 appears Example 351 #387 and #447 alarms appear Example 352 #436 alarm appears irregularly Example 353 #414 and #401 alarms appear Example 354 Alarm appears during self-check Example 355 Alarm occurs as soon as the tool contacts the workpiece Example 356 Hydraulic alarm occurs when the Z axis moves Example 357 Alarm occurs during rotation and positioning Example 358 Alarm occurs when the fourth axis is turned on Example 359 Alarm occurs when the machine is turned on after a holiday Chapter 11 Servo (other parts) failure 25 examples Example 360 Cannot reverse during positioning Example 361 X-axis size is sometimes large and sometimes small Example 362 Serious error occurs in the processing size Example 363 The center of the hole Example 364: The X axis has an error when punching Example 365: The feed value does not match the given value Example 366: There is a sliding phenomenon when returning to the reference point Example 367: There is jitter when returning to the reference point Example 368: After returning to the reference point, the operation cannot be continued Example 369: It stops before reaching the reference point Example 370: It cannot return to the reference point after relocation Example 371: The turret cannot rotate Example 372: The servo motor temperature is too high Example 373: The servo motor makes an abnormal sound Example 374: The X axis jitters Example 375: The X axis oscillates Example 376: The X axis load suddenly increases Example 377: The reference point indicator light is not on Example 378: The B axis has an alarm when rotating Example 379: The Y axis has an overtravel alarm Example 380: Overtravel alarm when returning to the reference point (1) Example 381: ReturnExample 382 Overtravel alarm when returning to the reference point (2) Example 383 Display PS200 alarm Example 384 #417 alarm appears during processing Chapter 12 Tool change mechanism failure 55 Example Example 385 Cannot perform any operation Example 386 Cannot start in automatic mode Example 387 All three feed axes cannot move Example 388 Cannot execute tool change command (1) Example 389 Cannot execute tool change command (2) Example 390 Cannot execute tool change command (3) Example 391 Cannot execute tool change command (4) Example 392 Cannot execute tool change action (1) Example 393 Cannot execute tool change action (2) Example 394 Cannot execute tool change action (3) Example 395 Cannot execute tool change action (4) Example 396 Cannot execute tool change action (5) Example 397 Cannot execute tool change action (6) Example 398 Cannot execute tool change action (7) Example 399 Cannot execute tool change action (8) Example 400 The tool change program stops midway (1) Example 401 The tool change program stops midway (2) Example 402 The tool change program stops midway (3) Example 403 The tool change program stops midway (4) Example 404 The tool change program stops midway (5) Example 405 The spindle sometimes stops suddenly Example 406 The rotary turret rotates continuously Example 407 The tool holder rotates continuously (1) Example 408 The tool holder rotates continuously (2) Example 409 Unable to input parameters such as tool setting values Example 410 The spindle moves down from the tool change position Example 411 The tool magazine cannot find the tool position due to swinging Example 412 The tool chain cannot find the reference point Example 413 The tool holder cannot find the tool number Example 414 The tool number is often mixed up during tool change Example 415 The tool holder cannot be positioned at an even-numbered position Example 416 The tool change mechanism changes tools twice in a row Example 417 The tool holder cannot be locked Example 418 The tool cannot be locked after it is in place Example 419 The tool holder cannot be locked when it is rotated Example 420 When the robot rotates 180° Example 421: Collision during tool change Example 422: Tool change door cannot be opened Example 423: Tool disc collides with workpiece after mistaken tool change Example 424: Turret indexing time exceeds Example 425: Abnormal movement of X-axis and Z-axis Example 426: Tool cannot be transferred to the right position Example 427: Tools cannot be exchanged with each other Example 428: Tool arm cannot retract claws Example 429: Tool magazine motor heats up and vibrates Example 430: Alarm occurs when tool magazine retreats Example 431: Alarm occurs when executing single-segment program Example 432: Alarm occurs when executing tool inspection program (1) Example 433 Alarm when executing tool inspection program (2) Example 434 Timeout alarm during tool change Example 435 #1200 and #1040 alarms Example 436 #2011 and #2014 alarms Example 437 #2096 alarm during tool change Example 438 \"Machine not in place\" alarm Example 439 Alarm at the position of the first tool Chapter 13 Auxiliary Part Failure 48 Examples Example 440 System power cannot be started Example 441 CNC lathe suddenly loses power (1) Example 442 CNC lathe suddenly loses power (2) Example 443 CNC lathe suddenly loses power (3) Example 444 Machining center suddenly stops (1) Example 445 Machining center suddenly stops (2) Example 446 Machining center suddenly stops (3) Example 447 No button can be operated Example 448 Plasma power supply cannot be started Example 449 Lathe cannot perform automatic cycle Example 450 Workpiece has no clamping action Example 451 Pneumatic chuck cannot be operated Example 452 Cannot perform table change action Example 453 Cannot perform plasma cutting Example 454 Crossbeam cannot rise or fall Example 455 X-axis suddenly stops moving Example 456 The machine tool vibrates when X-axis moves Example 457 Z-axis vibrates severely Example 458 Emergency stop switch cannot be unlocked Example 459 Worktable rotation cannot be stopped Example 460 Pallet stops in the middle of exchange Example 461 Vibration marks appear on the workpiece surface Example 462 Lathe processing size exceeds tolerance Example 463 There is an error when returning to zero point Example 464 The system detects parity error Example 465 Tool magazine cannot be locked after rotation Example 466 Telescopic rod motor does not rotate in the middle Example 467 Telescopic motor of push table rod is blocked Example 468 Spindle releases tool after 5s delay Example 469 Chuck is always in the loose state Example 470 The clamping jaws of the workpiece chuck open automatically Example 471 B table division Example 472: The milling machine display screen is completely dark Example 473: The screen disappears when returning to the reference point Example 474: #2021 alarm appears Example 475: #401 alarm appears occasionally Example 476: #431 alarm appears frequently Example 477: The machine stops and #941 alarm appears Example 478: The machine stops and #2005 alarm appears Example 479: #401 alarm appears during processing Example 480: The APC mechanism cannot rotate Example 481: Five alarms suddenly appear during processing Example 482: A9 appears when changing the tool —1151 Alarm Example 483 Lathe emergency stop alarm Example 484 Circuit breaker trip alarm Example 485 Hydraulic system alarm Example 486 Workpiece clamping alarm Example 487 Chip removal motor overload alarm Chapter 14 Other parts failure 34 examples Example 488 Machine tool cannot cycle start Example 489 System cannot start after power on Example 490 Cannot start after being idle for many years Example 491 CNC system has no power Example 492 CNC system automatically powers off Example 493 Hydraulic system cannot start (1) Example 494 The hydraulic system cannot start (2) Example 495 Cannot return to the reference point Example 496 Automatic processing often pauses Example 497 Processing program stops midway Example 498 Punch press suddenly stops working Example 499 The blank repair machine suddenly stops working Example 500 All feed axes cannot move Example 501 Stops working after pallet exchange Example 502 The spindle direction is opposite to the command Example 503 Cannot fine-tune when setting the tool Example 504 The punch falls slowly after losing control Example 505 The pallet base in the processing area is abnormal Example 506 The X-axis of the milling machine cannot move Example 507 The spindle swings back and forth in the directional position Example 508 Crash occurs when test cutting the workpiece Example 509 Collision occurs at irregular intervals Example 510 The power supply unit does not start Example 511 There is an abnormal discharge sound when cutting Example 512 There is no indication of the D phase of the stepper driver Example 513 The ammeter pointer swings sharply Example 514 The spindle is overloaded and alarms Example 515 The #414 and #424 alarms appear Example 516 The CRT displays the ALM950 alarm (1) Example 517 ALM950 alarm appears on CRT (2) Example 518 ALM085 and ALM086 alarms appear Example 519 Overtravel alarm during manual operation Example 520 Emergency stop alarm appears during operation Example 521 Alarm appears after power off and then restart Appendix Fault Quick Reference Table References\"Position\" alarm Example 439 Alarm at the first tool position Chapter 13 Auxiliary Part Failure 48 Example Example 440 System power cannot be started Example 441 CNC lathe suddenly loses power (1) Example 442 CNC lathe suddenly loses power (2) Example 443 CNC lathe suddenly loses power (3) Example 444 Machining center suddenly stops (1) Example 445 Machining center suddenly stops (2) Example 446 Machining center suddenly stops (3) Example 447 No button can be operated Example 448 Plasma power supply cannot be started Example 449 Lathe cannot perform automatic cycle Example 450 Workpiece has no clamping action Example 451 Pneumatic chuck cannot be operated Example 452 Cannot perform table change action Example 453 Cannot perform plasma cutting Example 454 Crossbeam cannot rise or fall Example 455 X-axis suddenly stops moving Example 456 The machine tool vibrates when X-axis moves Example 457 Z-axis vibrates severely Example 458 Emergency stop switch cannot be unlocked Example 459 Worktable rotation cannot be stopped Example 460 Pallet stops in the middle of exchange Example 461 Vibration marks appear on the workpiece surface Example 462 Lathe processing size exceeds tolerance Example 463 There is an error when returning to zero point Example 464 The system detects parity error Example 465 Tool magazine cannot be locked after rotation Example 466 Telescopic rod motor does not rotate in the middle Example 467 Telescopic motor of push table rod is blocked Example 468 Spindle releases tool after 5s delay Example 469 Chuck is always in the loose state Example 470 The clamping jaws of the workpiece chuck open automatically Example 471 B table division Example 472: The milling machine display screen is completely dark Example 473: The screen disappears when returning to the reference point Example 474: #2021 alarm appears Example 475: #401 alarm appears occasionally Example 476: #431 alarm appears frequently Example 477: The machine stops and #941 alarm appears Example 478: The machine stops and #2005 alarm appears Example 479: #401 alarm appears during processing Example 480: The APC mechanism cannot rotate Example 481: Five alarms suddenly appear during processing Example 482: A9 appears when changing the tool —1151 Alarm Example 483 Lathe emergency stop alarm Example 484 Circuit breaker trip alarm Example 485 Hydraulic system alarm Example 486 Workpiece clamping alarm Example 487 Chip removal motor overload alarm Chapter 14 Other parts failure 34 examples Example 488 Machine tool cannot cycle start Example 489 System cannot start after power on Example 490 Cannot start after being idle for many years Example 491 CNC system has no power Example 492 CNC system automatically powers off Example 493 Hydraulic system cannot start (1) Example 494 The hydraulic system cannot start (2) Example 495 Cannot return to the reference point Example 496 Automatic processing often pauses Example 497 Processing program stops midway Example 498 Punch press suddenly stops working Example 499 The blank repair machine suddenly stops working Example 500 All feed axes cannot move Example 501 Stops working after pallet exchange Example 502 The spindle direction is opposite to the command Example 503 Cannot fine-tune when setting the tool Example 504 The punch falls slowly after losing control Example 505 The pallet base in the processing area is abnormal Example 506 The X-axis of the milling machine cannot move Example 507 The spindle swings back and forth in the directional position Example 508 Crash occurs when test cutting the workpiece Example 509 Collision occurs at irregular intervals Example 510 The power supply unit does not start Example 511 There is an abnormal discharge sound when cutting Example 512 There is no indication of the D phase of the stepper driver Example 513 The ammeter pointer swings sharply Example 514 The spindle is overloaded and alarms Example 515 The #414 and #424 alarms appear Example 516 The CRT displays the ALM950 alarm (1) Example 517 ALM950 alarm appears on CRT (2) Example 518 ALM085 and ALM086 alarms appear Example 519 Overtravel alarm during manual operation Example 520 Emergency stop alarm appears during operation Example 521 Alarm appears after power off and then restart Appendix Fault Quick Reference Table References\"Position\" alarm Example 439 Alarm at the first tool position Chapter 13 Auxiliary Part Failure 48 Example Example 440 System power cannot be started Example 441 CNC lathe suddenly loses power (1) Example 442 CNC lathe suddenly loses power (2) Example 443 CNC lathe suddenly loses power (3) Example 444 Machining center suddenly stops (1) Example 445 Machining center suddenly stops (2) Example 446 Machining center suddenly stops (3) Example 447 No button can be operated Example 448 Plasma power supply cannot be started Example 449 Lathe cannot perform automatic cycle Example 450 Workpiece has no clamping action Example 451 Pneumatic chuck cannot be operated Example 452 Cannot perform table change action Example 453 Cannot perform plasma cutting Example 454 Crossbeam cannot rise or fall Example 455 X-axis suddenly stops moving Example 456 The machine tool vibrates when X-axis moves Example 457 Z-axis vibrates severely Example 458 Emergency stop switch cannot be unlocked Example 459 Worktable rotation cannot be stopped Example 460 Pallet stops in the middle of exchange Example 461 Vibration marks appear on the workpiece surface Example 462 Lathe processing size exceeds tolerance Example 463 There is an error when returning to zero point Example 464 The system detects parity error Example 465 Tool magazine cannot be locked after rotation Example 466 Telescopic rod motor does not rotate in the middle Example 467 Telescopic motor of push table rod is blocked Example 468 Spindle releases tool after 5s delay Example 469 Chuck is always in the loose state Example 470 The clamping jaws of the workpiece chuck open automatically Example 471 B table division Example 472: The milling machine display screen is completely dark Example 473: The screen disappears when returning to the reference point Example 474: #2021 alarm appears Example 475: #401 alarm appears occasionally Example 476: #431 alarm appears frequently Example 477: The machine stops and #941 alarm appears Example 478: The machine stops and #2005 alarm appears Example 479: #401 alarm appears during processing Example 480: The APC mechanism cannot rotate Example 481: Five alarms suddenly appear during processing Example 482: A9 appears when changing the tool —1151 Alarm Example 483 Lathe emergency stop alarm Example 484 Circuit breaker trip alarm Example 485 Hydraulic system alarm Example 486 Workpiece clamping alarm Example 487 Chip removal motor overload alarm Chapter 14 Other parts failure 34 examples Example 488 Machine tool cannot cycle start Example 489 System cannot start after power on Example 490 Cannot start after being idle for many years Example 491 CNC system has no power Example 492 CNC system automatically powers off Example 493 Hydraulic system cannot start (1) Example 494 The hydraulic system cannot start (2) Example 495 Cannot return to the reference point Example 496 Automatic processing often pauses Example 497 Processing program stops midway Example 498 Punch press suddenly stops working Example 499 The blank repair machine suddenly stops working Example 500 All feed axes cannot move Example 501 Stops working after pallet exchange Example 502 The spindle direction is opposite to the command Example 503 Cannot fine-tune when setting the tool Example 504 The punch falls slowly after losing control Example 505 The pallet base in the processing area is abnormal Example 506 The X-axis of the milling machine cannot move Example 507 The spindle swings back and forth in the directional position Example 508 Crash occurs when test cutting the workpiece Example 509 Collision occurs at irregular intervals Example 510 The power supply unit does not start Example 511 There is an abnormal discharge sound when cutting Example 512 There is no indication of the D phase of the stepper driver Example 513 The ammeter pointer swings sharply Example 514 The spindle is overloaded and alarms Example 515 The #414 and #424 alarms appear Example 516 The CRT displays the ALM950 alarm (1) Example 517 ALM950 alarm appears on CRT (2) Example 518 ALM085 and ALM086 alarms appear Example 519 Overtravel alarm during manual operation Example 520 Emergency stop alarm appears during operation Example 521 Alarm appears after power off and then restart Appendix Fault Quick Reference Table References
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