HEIDENHAIN iTNC 530 Service Manual page 25

Sources of Also observe likely sources of interference that may have a negative effect on the connected
interference units.
Noise is mainly produced by capacitive and inductive coupling from electrical conductors or from
device inputs/outputs, such as ...
Make sure that ...
Contact the machine manufacturer if these conditions are not fulfilled!
Contamination Pay special attention to contaminated units (oil, grease, dust, etc.)!
What could be the reason for the contamination?
Some examples:
Humidity Check whether humidity has entered the units!
What could be the reason?
Some examples:
Shipping brace of Check whether the shipping brace of the hard disk of the mounted control has
the hard disk been removed.
May 2006
Strong magnetic fields from transformers or electric motors
Relays, contactors and solenoid valves
High-frequency equipment, pulse equipment and stray magnetic fields from switch-mode
power supplies
Power lines and leads to the above equipment
There is a minimum distance of 20 cm from the MC 42x(B), CC 42x and its leads to interfering
equipment.
There is a minimum distance of 10 cm from the MC 42x(B), CC 42x and its leads to cables that
carry interference signals. For cables in metallic ducting, adequate decoupling can be achieved
by using a grounded separation shield.
The cross section of potential compensating lines is min. 6 mm2.
Caution
Only use original HEIDENHAIN cables, connectors and couplings as replacement!
Machining of graphite
Coolant or coolant vapor
Defective filter system in the electrical cabinet (filter pads)
Oil or oil vapor
Oil in the compressed-air system
Defective climate control unit in the electrical cabinet
Coolant or coolant vapor
Condensation of boards due to differences in temperature
Defective tubes, sealings, etc.
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