Yaskawa MP920 Motion Module - Manual (Page 254)

6.2 SVB-01 Parameters
6-19
6
21 Servomotor Gear
Ratio
(GEAR_MOTOR) These parameters determine the gear ratio between the motor and the load.
The following two values are set for a configuration in which the load shaft will
turn n times in response to m turns of the motor shaft.
• Gear ratio at Servomotor: m
• Gear ratio at load: n
Setting Example
In the above example, the reduction ratio is n/m, or 3/7 × 4/9 = 4/21. The follow-
ing setting would thus be made.
Servomotor Gear Ratio: 21
Load Gear Ratio: 4
1
22 Machine Gear Ratio
(GEAR_MACHINE) 1
23 Infinite Length Axis
Reset Position
(POSMAX) Set the reset position for a rotation when infinite length axis is set. This parame-
ter is not valid when a finite length axis is set.
• Setting range: 1 to 2 31 -1 [reference units]
Example: For rotating load, the value will be reset every 360 °.
360000
25 Maximum Number of
Absolute Encoder
Turns
(MAXTURN) Set the maximum number of rotations for the absolute encoder when an absolute
encoder is used.
• Setting range: 1 to 2 31 -1 [rotations]
Refer to Chapter 8 Absolute Position Detection of Machine Controller MP920
User’s Manual: Design and Maintenance (SIEZ-C887-2.1) for details.
99999
Table 6.2 Motion Fixed Parameters (cont’d)
No. Name Description Factory
Setting
Motor shaft:
m turns
7 turns
3 turns
9 turns
4 turns
Load shaft: n turns
270 °
180 °
90 °
0 °
0
POSMAX