79
AXOR Industries
Service Manual
NanoMack
®
ver.1 rev.11/'19
Homing Offset
This defines the difference between the zero position for the application and the machine's home
position (which is found during homing process). It is measured in pulses and the allowed values are
in ranges: +/-(2
32
-1). This value is assigned to the home position found at the end of a successful
homing process. The Homing Offset value is obtained by the execution of the following calculation:
Homing Offset = n° turns (also not integer) * 65536
Example:
suppose we have an application where the distance between the home position and the
zero position of the axis is equal to the distance that the axis can go with a rotation of 4 turns
plus an addition 90° mechanical turn.
The first thing to do is to find the number of turns to insert into the formula. In this example:
n° turns = 4 + 90°/360° = 4.25 to refer to the fraction of turn above 360°. Now it is possible to
calculate utilizing the following operation:
4,25
*65536 =
278528.
This bold number is the value
that must be inserted in the "Homing Offset" window.
After the setting of the desired homing parameters save the changes using the “Save
To EEPROM” function on the software interface, doing this the drive's setup will become
permanent.
4.9 Homing - Settings
Speed
This parameter sets the speed reference used during the homing process and it is given in “rpm”.
Zero Speed
This defines the motor's speed during the realignment with the homing sensor and/or during the
search for the encoder's zero pulse from the motor feedback after the home sensor is reached.
5- Digital inputs/outputs settings:
A homing procedure needs following settings:
- a digital programmable input with function
"Start Homing"
;
- a digital programmable input with function
"Homing Sensor"
;
- an output with function
"Homing OK"
.
Homing sensor connection:
Connect homing sensor to the digital input pin set with the "
Homing Sensor
" function.
