Husqvarna PG 680 RC, Operator'S Manual

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English – 31
OPERATING
Speed and direction of rotation for different uses
Speed and direction setting is often a matter of personal choice. Operators are encouraged to experiment to find which
settings best suit the given applications. The following table lists some suggested set-ups for different applications.
Variable speed drives/frequency converters
Each Husqvarna PG820 RC is equipped with 2 variable speed drive or frequency converter. This unit is incorporated
into the machine for the following reasons:
Functional
• Manipulate incoming power to enable increase/decrease in speed & direction change.
• Regulate current and voltage supply to the motors to ensure motors run at optimum levels (e.g. torque boost).
Protection
• Monitors incoming power to ensure suitability for machine and application being performed.
• Controls current being drawn by motors to ensure motors are running within safe operational limits (to prevent
damage to motor).
• Monitors load on machine to ensure the grinder is not being overloaded thus offering protection for belt, bearings
and other internal components.
• Protects motors from faulty power supply (e.g. running on 2 phases).
Diagnostic
• Identifies electrical faults with the machine and registers fault code.
• Has monitoring menus that help isolate cause of potential electrical faults.
Monitoring menus also enable operator to gauge how hard machine is working. Whilst it is not essential for an operator
to intimately know every feature of the variable speed drives or frequency converters, it is useful to be familiar with both
the fault codes as well as some of the monitoring menus.
Applications
Direction control
for planetary head
rotation Speed control for
planetary head
rotation
Direction of rotation
of grinding discs Speed setting for
grinding discs
Ceramic tile adhesive
removal
FWD 6-7 FWD 8-10
Carpet glue removal FWD 5-7 FWD 8-10
Epoxy paint removal FWD 5-10 FWD 8-10
Rain damaged concrete FWD 7-10 FWD 8-10
Smoothen exposed
aggregate
FWD 7-8 FWD 8-10
Lippage removal in
terrazzo/stone tiles
FWD 5-7 FWD 8-10
Concrete polishing with
plastic bonded tools
FWD 10 FWD 8-10
PIRANHA™ scraper tool REW 3-5 REW 3-5
Re-grouting procedure
during HiPERFLOOR™
process
FWD 8-10 FWD 3-5
NOTICE! In the above table, FWD & FWD are listed together to indicate direction settings in the same direction (i.e.
It can also be REV/REV). The only application where direction settings must be in the same directions and also
direction specific is when using the PIRANHA™ scraper tools. In this particular application the setting must be in the
REV/REV direction.