Specifications

AP - 20 Applications Ver. 0002
AP.3.2 GEAR RATIOS
The gear ratios consist of parameters NP121, NP122 and NP123 only.
These parameters indicate the mechanical transmission ratio between the motor and the axis
ballscrew or between the motor and the tool in the spindle. NP123 indicates the pitch of the
ballscrew.
Axes:
These parameters must be set for each Gear Ration and change the Active Ratio with
each gear change.
Spindle:
These NP parameters must be updated for each change of Gear only when working in
SERCOSLE=1 mode and if we want to display the spindle speed on the CNC screen or
work in M19 mode or in Rigid Tapping.
In those cases, the mechanical maneuver in the machine gear box will be accompanied by a
change of Active Gear Ratio
The command to change gears is given through the Sercos interface. This change
cannot be handled through digital inputs.
Operation status:
Parameter GP6 sets the number of useful gear ratios (1
<
GP6
<
8).
Variable GV25 informs which is the current (actual) gear ratio (0
<
GV25
<
GP6).
Variable GV26 registers the preselected Gear Ratio
GV25GV26
ActualGearRatioGearRatioPreselection
Delay