Yaskawa MP930 - Manual (Page 205)

Parameters
5.2.1 Fixed Parameters
5 -20
Parameter
No.
Name Description Default
20 Gear ratio, ser-
vomotor end The gear ratio between the motor and load is determined by these parameters. The fol-
lowing 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.
S Gear ratio, servomotor end: m
S Gear ratio, load end: n
Setting Example
7 turns
4 turns
1
21 Gear ratio,
load end
In the above example, the reduction ratio is n/m, or 3/7 x 4/9 = 4/21. The following set-
tings would thus be made.
Gear ratio, servomotor end: 21
Gear ratio, load end:
4
Motor shaft:
m turns
Load shaft:
n turns
3 turns
9 turns
1
22 Maximum in-
finite length
counter value
(POSMAX) Set the period of an infinite axis in reference units. This parameter is valid when an infi-
nite length axis has been set in the fixed parameters.
S Setting range: 1 to 2 31 − 1
360000
23 Maximum ab-
solute encoder
rotations Set the maximum number of rotations handled by the absolute encoder. This parameter
is valid when an absolute encoder is being used and an infinite length axis has been set.
Set according to the encoder specifications.
S Setting range: 1 to 2 31 − 1
99999
24 Positive stored
stroke limit Set the positions at which the stored stroke limit function is to operate on the machine
coordinate system. 2 31 −1
25 Negative
stored stroke
limit S Setting range: −2 31 to 2 31 − 1 (1 = 1 reference unit)
Whether or not the stored stroke limit function is used is set in bits b7 and b8 of the Ser-
vo Controller Function Selection flags in the fixed parameters.
−2 31
26 Zero point re-
turn method 0: DEC signal + C-phase
1: ZERO signal
2: DEC signal + ZERO signal
3: C-phase
S Setting range: 0 to 3
0
5