Fuji Electric ALPHA5 Smart, User Manual

Page: 183 / 636

CHAPTER 4 PARAMETER
Basic Parameters
4-15
4
PA1_12 Z-phase position offset
No. Name Setting range
Default
value
Change
12
Z-phase position
offset
20-bit PG
：
0 to 1048575 [pulses]
18-bit PG ： 0 to 262143 [pulses]
0 Power
The Z-phase output position shifts. The Z-phase output position shifts in the CCW direction by the
specified pulse amount. For servomotors having "HB2" at the end of the model name (18-bit encoder),
the maximum value is 262143 pulses.
This parameter is irrelevant to the rotation direction selection (parameter PA1_04).
The Z-phase used for homing is also the position that is offset with this parameter.

Z-phase output position (20-bit encoder)

If the Z-phase position offset is 0

If the Z-phase position offset is 262144
* The position of the key is not always the Z-phase position.
The position of the key is supposed to be the Z-phase position in this explanation.
■
In the case of GYB motor,at speed of 100r/min or less after the power turned on,the output of first
Z phase will happen within 1 rotation after the motor becomes over 12-degree as worst.
PA1_13 Tuning mode selection
No. Name Setting range
Default
value
Change
13 Tuning mode selection
10: Auto tuning
11: Semi-auto tuning
12: Manual tuning
13: Interpolation operation mode
14: Trace operation mode
15: Shorter cycle time operation mode
10 Always
This parameter is enabled under position and speed control.
Select the tuning method of the servo amplifier. Refer to the following description to select the mode.
 Auto tuning (default value)
In this mode, the ratio of moment of inertia of the load of the machine is always assumed inside the
amplifier and the gain is automatically adjusted to the best one. "0" is entered, too, in case of easy
tuning.
 Semi-auto tuning
Use this mode if the ratio of moment of inertia of the load of the machine has relatively large
fluctuation or the ratio of moment of inertia of the load is not estimated correctly inside the
amplifier.
Z-phase position *
262144 pulses
Motor shaft
Motor shaft
Z-phase position *
1048576 pulses/rev
= 0.25 rev
The Z-phase shifts 0.25
revolutions in the CCW
direction.