Mechanical Zero Search - JVL MAC050 User Manual

2.5
2.5.1 Mechanical zero search modes
In all positioning systems, there is a requirement to be able to find a mechanical zero po-
sition after the system is powered up or at specific times during operation. For this pur-
pose the MAC motor offers 3 different Zero search modes which can be selected in the
MacTalk main window or by sending a command at one of the serial interfaces.
The menu offers 7 choices:
Disabled (default)
Power up: Torque
Power up: Sensor type 1 Similar to "Sensor type 1" but the Zero search will auto-
Power up: Sensor type 2 Similar to "Sensor type 2" but the Zero search will auto-
Torque
Sensor type 1
Sensor type 2
The following sections explain in detail the functionality of the 3 fundamental Zero search
modes.
2.5.2 Starting a Zero search
If the Zero search mode is set to Disabled, no Zero search is done at any time.
If one of the 3 modes Power up: Torque, Sensor type 1 or Sensor type 2 is selected, the re-
spective Zero search mode will be executed every time the MAC motor is powered up.
The Zero search can also be initiated by sending a specific command via one of the serial
interfaces — please consult the technical manual (LB0048-xx) for more details.
26 JVL Industri Elektronik A/S - User Manual - Integrated Servo Motors MAC050 - 800

Mechanical zero search

The Zero search is disabled.
Similar to "Torque" but the Zero search will automatically
be started after power up.
matically be started after power up.
matically be started after power up.
The Zero search will start searching for Zero until a me-
chanical "collision" occurs. The point at which the motor
torque is equal to the specified value of the Zero search
torque is defined as the zero position.
The Zero search function will start seeking for Zero until
an external sensor is activated. The point at which the sen-
sor is activated is defined as zero. The active sensor level
can be changed by changing the sign at the value specified
in the Zero search torque field.
Like above (Sensor type 1) but after the sensor is activated
the direction of movement is reversed and the point at
which the sensor is disabled is defined as zero.
Select the Zero search mode
using this field. The selected format will
be used as follows :
- Immediately after ther motor is powered up
(only the "Power up ...." Formats)
- If a search is initiated via the serial
interface or
- From an expansion module (MAC00-R1,
R3 or FP2).
Please note that the 3 formats for
"Power up" Zero search must not be
selected if an expansion module is used
(MAC00-R1, R3 or FP2). If an automatic
zero search after "Power up" is required
when using one of these modules, the
function must be enabled on the product tab
for the actual module. (See also the chapters
describing the expansion modules)
TT0919GB