Lloyd LS1 - 8 Mechanical Assemblies; General; Performance Checks

LS SERIES SERVICE MANUAL
ISSUE 4.0 MECHANICAL ASSEMBLIES 1
8. MECHANICAL ASSEMBLIES
8.1 General
The machine should be checked annually to ensure that it runs at optimum efficiency. This
annual maintenance consists of a performance check, inspection of the mechanics and
lubrication of the main mechanical items. The machine should also be calibrated according
to the local standards as explained in the Calibration Section.
The loading frame is a precision electro-mechanical unit that is constructed and assembled to
withstand a variety of tests with minimum maintenance. There is no periodic maintenance required
for any of the electronic modules, which are designed for long life and have adequate heatsinking
where required.
Please be aware that there are high voltages present in some parts of the machine and whilst
every precaution has been taken in the design to ensure safety, care must be taken when the
covers are removed for servicing.
REMOVE THE MAINS INPUT CABLE BEFORE WORKING ON THE MACHINE.
The mainframe is capable of exerting large loads when the crosshead is moving and it is important
to ensure that parts of the body or clothing do not come into contact with the load bearing surfaces,
especially when in the compression mode.
8.2 Performance Checks
1 Check the machine for obvious signs of damage.
2 Check that the earth pin of the mains input connector is connected to all exposed
metalwork. The resistance should be less than 0.5 Ohms. If the reading is higher than this,
check the earth tags for corrosion and check the tightness of the earth tag bolts.
3 Check that the mains input selector is set to the correct voltage as indicated on the selector
on the mains input connector.
4 Switch the machine on and check that the console displays the start-up message. If there is
no sign of power, check the mains input fuses mounted on the mains input connector on the
rear of the machine.
5 Press the FAST UP key and check that the machine runs upwards at full speed without
excessive noise. If the machine does not run, check the fault-finding section for details.
6 Press the SLOW UP key and check that the machine runs at a slow speed. If the machine
continues to run at full speed, check the motor encoder.
7 Press the FAST DOWN key and check that the machine runs downwards at full speed
without excessive noise. If the machine does not run, check the fault-finding section for
details.