Zapi ACE0 2mC, User Manual

Page: 87 / 155

AF6ZP0CA – COMBIAC0 & ACE0 2uC – User Manual Page – 87/155
9 OTHER FUNCTIONS
9.1 PROGRAM VACC function
This function enables the adjustment of the minimum and maximum useful levels
of the voltage from the accelerator potentiometer, in both directions. 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. Before calibration, Vmot percentage
is mapped over the default 0 – 5 V range; instead, after the adjustment procedure
it results mapped over the useful voltage ranges of the potentiometer, for both
directions.
Before ‘PROGRAM VACC’ After ‘PROGRAM VACC’
PROGRAM 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 13.1.4 or 13.2.6.
9.2 PROGRAM LIFT / LOWER function
This function allows to adjust the minimum and maximum useful signal levels of
lift and lowering request. This function is useful when it is necessary to
compensate for asymmetry of the mechanical elements associated with the
potentiometer, especially relating to the minimum level.
This function looks for and records the minimum and maximum potentiometer
wiper voltage over the full mechanical range of the lever.
The values to be acquired are organized in the ADJUSTEMNT list, they are:
- MIN LIFT DC
- MAX LIFT DC
- MIN LOWER