1、 Motor and Drive PartsTIMING BELT REPLACEMENT1, Power source must be connected to machine and turned on. Turn the power disconnect/lockout switch to the “O” (OFF) position and lock out. Allow machine to come to a complete stop, then press the “I” (START) button and hold for two seconds to verify tha
2、t the machine will not start.2, After the green guard locking switch status light illuminates (when all rotating parts are idle) rotate the latch handle on the gear compartment door and open the gear door.3, Remove the belt guard by removing the hand knob that holds the guard (inside the gear compar
3、tment).4, Loosen the two pinch fasteners in the jack shaft spindle assembly (Figure 50).5, Loosen the motor mounting fasteners and slide the motor to release belt tension. Remove the belts (Figure51). Figure 50Loosen pinch fasteners in jack shat spindle assembly (1) Pinch Fasteners,(2) Jack Shaft Sp
4、indle Assembly Figure 51 Timing Belts(1)TIMING BELT TENSION1, Use the motor tension wrench to slide the motor and apply tension to the timing belts. The pin on the wrench fits in a hole on the support housing(Figure52). The pinch fasteners in the jack shaft spindle assembly must be properly tension
5、both belts. Tighten the motor mounting fasteners, and then tighten the pinch fasteners in the jack shaft spindle assembly. Figure 52 Using the motor to apply belt tension. (1) Motor Tension Wrench2, Replace belt guard and tighten with the hand knob.3, Close and rotate latch handle connecting the gea
6、r compartment door and support housing. Electrical AssemblyINSPECTION WARNING: In the event of an electrical problem, only a qualified electrician should inspect or repair the fault. Voltages dangerous to life exist in the starter enclosure! The power disconnect/lockout switch must be in the “O”(OFF
7、) position. Live voltages are still present in the box even though disconnect is off. Always disconnect and lock out power source before beginning electrical inspection or repair. The electrical assembly must be in good working condition before operating this machine. For a description of the amplif
8、ier and safety switch operation and method for checking this system. Electrical schematics are located in the starter enclosure. Refer to Figures53 and 54 and inspect the following: Figure 53 Starter enclosure interior with variable frequency drive. (1) Disconnect Switch, (2) Guard Locking Switch Po
9、wer Disconnect, (3) Main Fuses, (4) Earthing Terminals, (5) Transformer, (6) Transformer Fuses Block, (7) Variable Frequency Drive, (8) Contactor, (9) Standstill Monitor, (10) Control Relay Figure 54 Starter enclosure interior, across-the-line start. (1) Disconnect Switch, (2) Guard Locking Switch P
10、ower Disconnect, (3) Main Fuses, (4) Earthing Terminals, (5) Transformer, (6) Transformer Fuse Block, (7) Overload Relay, (8) Contactor, (9) Standstill Monitor, (10) Control RelayStarter enclosure: Inspect interior of starter enclosure for corrosion. If a significant amount of water accumulates in t
11、he bottom of the starter enclosure, check the breather drain. Breather drain should be free from obstruction. Excess water could also indicate an opening or loose fitting that allows water to enter the enclosure. Check all access points to the enclosure. Check gasket around door and window. Inspect
12、push/pull stop button, “I” (START) push button assemblies, selector switches and pilot light assembly for damage or corrosion. Replace rubber boots and pilot light lens if damaged. NOTE: Electrical components that fail due to water or chemical contamination are not covered under the warranty.Fuses:
13、Remove transformer fuses, located in the transformer fuse blocks. Check with an ohmmeter or continuity light. If one fuse is replaced, all others of that type fuse should also be replaced. Machines equipped with variable frequency drive(VFD):The drive currently in use is the GPD315/V 7. If the digit
14、al display on the drive is not illuminated when the machine is energized, contact Urschel Laboratories. Standstill monitor: Terminals should be tight and free from corrosion. Monitor must be replaced if damaged. Power line filter (CE compliant machine with VFD): See the electrical assemblies illustr
15、ations in the “Parts” section of this manual for part locations. Guard locking switches: Replace or straighten actuator key if it is damaged or bent. Check cords for cuts or abrasions. If the green guard locking switch status light does not illuminate when power to the machine is connected, contact
16、Urschel Laboratories. Switch must be replaced if it has been forced open while locked. Use only new screws that are supplied with the switch. Manual release must be in “lock” position when removing and replacing lid( Figure 55). Figure 55 Guard Locking Switch. (1) Green Guard Locking Switch Status Light, (2) Guard Locking Switch Manual Release
