Grinder
| Symptoms of failure | Affected parts | Method of inspection | Cause of failure | Recommended action | Recommended action |
|---|---|---|---|---|---|
| Operation out of control (disconnected) | Switch | Check the switch ON/OFF and for damage | Mixing in of foreign matter | Cleaning and foreign matter removal | Cleaning |
| Decrepitude (exceeded the endurance limit) | Modifying and replacing the switch | Exchanging the switch | |||
| Damage due to impact | |||||
| Check the left and right rotation and the change of speed | |||||
| Socket damage and omission | |||||
| Code | Check whether the code is disconnected | Disconnection due to abnormal tension of the part of code clip when moving | Modifying and replacing the code section | Exchanging the code | |
| Phenomenon of code being gnawed due to misuse during operation | |||||
| Code socket damage and omission | |||||
| Switch connection | Check the switch socket connection and for damage | Code lead wire socket damage and breakaway | Reconnecting the lead wire, modifying and replacing the socket | Switch connection picture | |
| Connection failure | |||||
| Stator lead wire socket damage and breakaway | |||||
| Soft starter | Check the soft starter connection and for damage | Soft starter socket damage due to overload | |||
| Damage due to impact | Replacing the soft starter | Exchanging the soft starter | |||
| Amateur | Check whether the amateur coil is disconnected | Coil burn-out thermic due to overload caused by excessive operation | Replacing the amateur | Exchanging the amateur | |
| In case of operation exceeding the rated using time | |||||
| Coil damage due to entry of foreign matter | Cleaning and replacing | ||||
| Stator | Check whether the stator coil is disconnected and for burn-out | Stator burn-out due to overload caused by excessive operation | Replacing the stator | Exchanging the stator | |
| Operation exceeding the rated using time | |||||
| Coil damage due to entry of foreign matter | Cleaning and exchanging | ||||
| Stator lead wire connection part damage | |||||
| Carbon brush | Check if the carbon brush is able to connect with the amateur | Use exceeding the carbon brush abrasion limit line | Replacing the carbon brush | Exchanging the carbon brush | |
| Spring operation failure due to assembling failure | |||||
| Amateur commutator part contact failure due to entry of foreign matter into the brush holder | Cleaning and exchanging | ||||
| Check whether or not the desired carbon brush is inserted into the brush holder | |||||
| Interference | Amateur, Stator | Check the amateur and stator for interference | Amateur, stator not duly reaching the housing | Modifying and replacing | Exchanging the amateur |
| Stator and amateur core failure | Exchanging the stator | ||||
| Bearing | In case of bearing abrasion and damage | In case of abrasion and damage due to exceeded bearing part endurance limit | Replacing the bearing | Exchanging the bearing | |
| Processed goods, Projected goods | Check the processed goods, projected goods bearing's duly reaching part and the processed goods bearing's duly reaching part for abrasion(gear cover, housing, packing grand) | Inappropriate bearing injection part's distance between shelves | Separate replacement in case of abrasion on each part | Exchanging the housing, gear cover, packing grand, amateur | |
| In case of bearing injection part's abrasion due to exceeded endurance limit of each processed good/projected good | |||||
| Louver packing | Check the louver packing for damage, abrasion, and its insertion | Damaged and pressed down in case of inserting the louver packing (assembling failure) | Modifying and replacing | ||
| Shaking | Amateur | Check the A/R shaft for bending and puncture | Putting drivers between the fans due to the carelessness of the consumer while exchanging the wheel | Replacing the amateur | Exchanging the amateur |
| Check the amateur fan for bending | Deformation | ||||
| Bearing | Check the bearing for wear and damage | Check whether the code is disconnected | Replacing the bearing | Exchanging the bearing | |
| In case of bearing damage | |||||
| Processed goods, Projected goods | Check the processed goods,projected goods bearing's duly reaching part for abrasion (gear cover, housing, packing grand) | In case of decrepitude of each part's processed goods | Separate replacement in case of abrasion on each part | Exchanging the housing, gear cover, packing grand | |
| Inappropriate bearing injection part's distance between shelves | |||||
| Others | Whether or not the stone is shaking | Abnormal warping due to humidity dry | Replace the wheel&wheel nut with genuine parts | Exchanging the cap | |
| In case of wheel nut processing failure (check floor plan) | Wheel damage occurred | Exchange the wheel & wheel nut with genuine parts | |||
| Louver packing omission | Use of defective wheel goods (fixture) | Louver packing assembly | Exchanging the drill chuck | ||
| Flame failure | Carbon brush flame | Brush holder's shaking | Scratching phenomenon and deformation of external diameter of amateur commutator | Replacing the amateur | Exchanging the amateur |
| Severe carbon brush damage and abrasion | |||||
| Carbon brush spring elasticity loss | Exceeded the carbon brush abrasion limiting line | Replacing the amateur/ carbon brush | |||
| Flame due to carbon brush failure(equipment) | |||||
| Flame due to overheating | Check the contact between the amateur and the stator (interference) | Burn-out due to overload | Exchanging the amateur and stator | Exchanging the amateur, stator | |
| Coated Films' concentricity failure | Replacing the bearing | Exchanging the bearing | |||
| Flame caused by shaking | Check the bearing for damage | Bearing damage due to entry of foreign matter | Replacing the bearing | Exchanging the bearing, pinion, gear spindle | |
| Check the gear, pinion, Coated Films for wear | Coated Films and Processed goods loosening (deformation) | Replacing the Coated Films and Processed goods | |||
| Amateur Flame | Check the commutator surface's degree of scratching | Scratching phenomenon of commutator | Replacing the amateur | Exchanging the amateur | |
| Check the commutator surface's degree of wear | Amateur balance failure | ||||
| Check the amateur core insulating paper for damage | Insulating paper damaged due to entry of foreign matter(dust) | ||||
| Stator Flame | Check the stator coil for wear | Burn-out due to overload | Replacing the stator | Exchanging the stator | |
| Check the stator coil insulating paper for damage | |||||
| Brush holder | Check whether the brush holder is assembled correctly to the housing | Insufficient tightening of the brush holder volt (M4*10) | Tighten the brush holder volt | Checking and exchanging the brush holder | |
| Louver packing | Check if the louver packing is assembled well | Louver packing assembly omission and assembling failure (squashed) | Modifying and replacing | Exchanging the amateur | |
| Damage (broken) | Amateur | Check the amateur commutator and fan for damage | Use of goods other than the manufacturer's goods | Replacing the amateur (check with the naked eye) | Exchanging the amateur |
| In case of exceeding the term of guarantee | |||||
| Handle | Check the handle (A),(B) for damage | Material failure, external impact, deformation | Modifying and replacing the handle (check with the naked eye) | Exchanging the housing handle | |
| Bearing | Check the bearing for wear and damage | Decrepitude due to exceeded term of guarantee | Replacing the bearing | Replacing the bearing | |
| Damage due to forcible injection of bearing | |||||
| Gear, Pinion | Check the gear or pinion chisel part damaged | In case of overload due to operation exceeding the rated using time | Replacing the gear or spindle | Replacing the pinion | |
| Decrepitude due to exceeded term of guarantee | Exchanging the gear, spindle | ||||
| In case of material's heat treatment failure | |||||
| Cap | Check the cap for damage and omission | Cap, rock pin damaged by impact | Modifying and replacing | Exchanging the cap | |
| Press the cap during operation | |||||
| Processed goods, coated Films, Projected goods | Check the processed goods, coated films, and projected goods for damage | External impact | Modifying and replacing | Exchanging the housing | |
| In case of material failure | |||||
| In case of heat treatment failure | Exchanging the gear cover, packing grand | ||||
| Sape deformation | |||||
| Electronic parts | Check the switch, carbon brush, brush holder, and soft starter for damage | In case of non-operation due to entry of foreign matter into the switch | Modifying and replacing | Cleaning | |
| In case of excessive tightening of fixing bolt of brush holder part | Exchanging the code, switch | ||||
| In case of use of goods other than the manufacturer's goods for the carbon brush | Exchanging the soft starter | ||||
| Press, projected goods | Check the wheel guide for any crushed or damage part | In case of careless handling by the consumer | Replacing | Exchanging the cap | |
| External impact | |||||
| Noise | Amateur | Abnormal noise ("woong") due to amateur fan noise | In case the fan guide assembly is omitted | Replacing the amateur | Exchanging the amateur |
| Amateur fan is running idling | |||||
| Gear, Pinion | Check the gear and pinion chisel part for wear and damage | In case of abnormal use during the term of guarantee (decrepitude) | Modifying and replacing | Replacing the pinion | |
| In case of occurrence of abnormal noise resembling iron being sharpened | In case of failure of the chisel part | Exchanging the gear, spindle | |||
| Check the gear injection condition | In case of gear chisel part damage, wear | ||||
| Bearing | In case of the bearing's wear and damage | In using equipment | Replacing | Exchanging | |
| Abrasion over time and damage due to exceeded endurance limit | |||||
| Dust seal assembly omitted | |||||
| Others | Check if the amount of grease is adequate | Noise caused by insufficient grease | Supplement grease | Injecting grease | |
| Output(RPM) decline | Amateur | Check the load current | Decrepitude due to exceeded endurance limit | Replacing the amateur | Exchanging the amateur |
| Amateur coil failure | |||||
| Amateur commutator fusing failure | |||||
| Stator | Check the stator coil for burn out due to overload | Overload heat splice(coil burn-out) | Replacing the stator | Exchanging the stator | |
| Bearing | Check whether rotation is not smooth due to wear and damaged | Entry of foreign matter | Cleaning, replacing | Cleaning, exchanging | |
| Punctured during assembly | Replacing the bearing | Exchanging the bearing | |||
| Grease quantity | Check whether excessive the grease has been injected | Grease over-injection (no-load current build-up) | Injecting a fixed amount of grease | Injecting a fixed amount of grease | |
| Processed goods (Coated Films) | Check the occurrence of blurring in case of abrasion due to overuse of bearing's injecting part | Decrepitude due to exceeded endurance limit | Replacing the processed good (Coated Films) | Exchanging the housing, gear cover, packing grand | |
| Inappropriate bearing injection part's distance between shelves(no-load current build-up) | |||||
| Louver packing | Check the louver packing's assembly condition | Louver packing omission and assembly failure (squashed) | Modifying and replacing | Exchanging the amateur | |
| Overheating | Amateur, Stator | Check the amateur and the stator for interference | Failure while fastening the stator fixing bolt | Modifying and replacing | Exchanging the amateur |
| In case of bearing abrasion and damage | Exchanging the stator | ||||
| Bearing | Check the bearing the abrasion and damage | Check for wear and damage due to exceeded endurance limit of the bearing part | Exchanging the bearing | Exchanging the bearing | |
| Bearing part dust seal assembly omitted | |||||
| Grease | Check whether the amount of grease is adequate | In case of insufficient amount of grease | Injecting a fixed amount of grease | Injecting grease | |
| Processed goods, Projected goods | Check the processed goods bearing's duly reaching part for abrasion (gear cover, housing, cylinder case, crank case) | In case of the bearing injection part's abrasion due to exceeded endurance limit of each processed good | Exchanging the housing | Exchanging the housing | |
| Others | Failure in assembly of various parts assembling failure (EX: less tighten) | Assembling failure | Modifying various parts | Using observable related measuring instrument | |
| Check the voltage(V) | Check whether or not the voltage(V) is rated voltage | ||||
| Running idle | Spindle, Gear | Check the running idle of the spindle, gear | Spindle, gear processing failure | Replacing | Exchanging the amateur |
| Gear pinion | Check the running idle of the gear pinion | Gear pinion heat treatment failure | Replacing | Exchanging the pinion | |
| Gear injecting failure | Exchanging the gear, spindle | ||||
| Others | Check whether the pinion tightening nut came loose | Loosening caused by lack of clamping force of pinion tightening nut | Modifying | Exchanging the pinion | |
| Amateur | Check the commutator for damage | Using amateur fixture | Modifying and replacing | Exchanging the amateur | |
| Check the amateur coil for puncture | Amateur coil turning failure | ||||
| Check the amateur coil part for foreign matter (dust) | Heat releasing due to entry of foreign matter | ||||
| Stator | The stator coil is punctured and the insulating paper is damaged | Coil and insulating paper burn-out due to heat release caused by mixing in of foreign matter | Cleaning and replacing | Exchanging the stator | |
| Foreign matter (dust) | Inadequate cleaning | ||||
| Leak | Carbon brush | Interchanging the carbon amateur and stator | Quality problem of carbon brush | Replacing the amateur | Exchanging the amateur |
| Inadequate cleaning | |||||
| Brush holder | Brush holder crack and damage | In case of excessive tightening of fixing bolt of brush holder part | Replacing the brush holder | Exchanging the brush holder | |
| Check the brush holder socket part | Short occurred due to loose socket part (fire phenomenon) | ||||
| Code | Check whether the code sheath is peeled off | Consumer carelessness | Modifying and replacing | Exchanging the code | |
| Check the code socket | Code failure | ||||
| Failure during assembly | |||||
| Switch | Switch socket failure, damage | Check the switch socket for damage and deformation | Modifying and replacing | Exchanging the switch | |
| Connection layout | Check whether the lead wire is squashed | Assembling failure | Modifying the squashed part | Check with the naked eye whether the lead wire is squashed |