Husqvarna PG 530 Operator's Manual page 16

NOTICE! Planetary head and grinding heads are set to
both turn in the same direction (i.e. both in clockwise
rotation or both in counter-clockwise rotation).
A more powerful grinding force is created when both
planetary head and grinding discs heads are running in
the same direction. The end result is higher productivity
than when the discs are set to run in opposite directions.
It is here that you will also experience the beneift of Dual
Drive Technology™.
To improve the cutting efficiency of diamonds, change
directions on a regular basis. This will work both sides of
the diamond crystals, keeping the abrasives as sharp as
possible by creating maximal exposure of the diamond
crystal.
16 – English
OPERATING