Formech IMD508, Installation, Operating And Service Manual

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Manual - Formech IMD508
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Machine Adjustments & Settings
Electrical
The PLC relies on the limit switches continually reporting correct mechanical positioning information.
Although extremely robust, limit switches and cylinder sensors are frequently activated. The security and
operation of switches and sensors require checking during periodic maintenance.
If a limit switch is not operating properly nor will the PLC operating system. Limit switch faults will stop the
auto cycle and may prevent the machine functions completely.
A logical approach to detecting the fault begins with an exact appraisal of the fault scenario.
Much time can be wasted looking in the wrong areas for a problem that, when found, was obvious.
Assessment of the fault will entail understanding which interlocks operate to prevent further actions.
Typical fault scenarios
> Table will not rise
Check that the heaters are in the back position and that the heater-back limit switch has been operated.
Check that the clamp frame is properly engaged and the limit switch operated.
Heater will not come forward
Check that clamp and table are down and then plug is up and the carriage is to the right and the limit
switches operated.
Heater
The flexible cable chain between the heaters and the control cabinet contain a number of heatproof power
and thermocouple cables. Due to the continual motion of the heater these may eventually suffer from
fatigue and require replacement.
Only the correct grade of cable should be used, and the work carried out by a skilled technician.
The Ceramic heating elements should be periodically inspected for damage to the Ceramic elements and to
make sure that they are securely mounted and that the electrical connections are tight.
For the reasons stated the elements, associated cables, connectors, fuses and are specifically excluded from
our standard warranty.
Before any maintenance work is carried out both electrical and air supplies must be locked in the
OFF position. Only a qualified electrical technician may work on any parts carrying mains voltage.
That person is responsible for ensuring that the machine is in a safe condition before allowing
services to be restored.