AFFZP0BB – ACE3 – User Manual Page – 73/139
8 OTHER FUNCTIONS
8.1 PROGRAM VACC function
This function enables the adjustment of the minimum and maximum useful levels of
the accelerator voltage, in both direction. This function is particularly useful when it
is necessary to compensate for asymmetry of mechanical elements associated with
the potentiometer, especially relating to the minimum level.
The following two graphs show the output voltage of a potentiometer versus the
mechanical angle of the control lever. Angles MI and MA indicate the points where
the direction switches close, while 0 represents the mechanical zero of the lever, i.e.
its rest position. Also, the relationship between motor voltage (Vmot) and
potentiometer voltage (Vacc) is shown. After the adjustment procedure, Vmot
percentage is mapped over the useful voltage ranges of the potentiometer, for both
directions. On the other hand, before calibration it results mapped over the default
0 – 5 V range.
Before ‘PROGRAM VACC’ After ‘PROGRAM VACC’
PROGREAM VACC can be carried out through Zapi PC CAN Console or through
Zapi Smart Console. For the step-by-step procedures of the two cases, refer to
paragraphs 0 and 12.2.6.
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