30
Prima Sprint.
OPERATING MANUAL
VERSION 07/2009 ORDER NUMBER DOC 2305835
5.8 GROUNDING
For security reasons the manual system must be correctly grounded. Normally this is done
via the mains cable.
Good grounding of the workpiece is also necessary for optimum powder coating.
It is important to keep the earth cables as short as possible. Earth cables of an excessive
length must be shortened. Earth cables of an excessive length must never be wound up
on a roller.
A poorly grounded workpiece causes:
● Dangerous electric charging of the workpiece.
● Very bad wrap around.
● Uneven coating.
● Backspraying to the spray gun, i.e. contamination.
Prerequisites for perfect grounding and coating are:
● Conducting suspension for the workpiece that is to be coated.
● Grounding of the powder coating booth, transport and suspension equipment to
be provided on site, in accordance with the corresponding Operating manuals or the
defi nitions laid down by the manufacturer.
● Regular cleaning of hangers from powder residues.
● Grounding resistance for the workpiece of a maximum of 1 MΩ (mega ohm).
● Grounding cable connected to the controller module or control cabinet.
Sparks between workpiece and conveyor hooks (hangers) can occur if hooks or
other hanger parts are not completely cleaned! These sparks can cause heavy radio
frequency interference (electro-magnetic compatibility = EMC).
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