YASKAWA Sigma-7 SGD7S Series

8.3 Inspections and Confirmations before Trial Operation
To ensure safe and correct trial operation, check the following items before you start trial
operation.
n Make sure that the SERVOPACK and Servomotor are installed, wired, and connected
correctly.
n Make sure that the correct power supply voltage is supplied to the SERVOPACK.
n Make sure that there are no loose parts in the Servomotor mounting.
n If you are using a Servomotor with an Oil Seal, make sure that the oil seal is not dam-
aged. Also make sure that oil has been applied.
n If you are performing trial operation on a Servomotor that has been stored for a long
period of time, make sure that all Servomotor inspection and maintenance procedures
have been completed.
Refer to the manual for your Servomotor for Servomotor maintenance and inspection
information.
n If you are using a Servomotor with a Holding Brake, make sure that the brake is
released in advance. To release the brake, you must apply the specified voltage of 24
VDC to the brake. A circuit example for trial operation is provided below.
M
BK
ENC
U
V
W
CN2
AC DC
L1
L2
L3
L1C
L2C
24 VDC
Power supply
SERVOPACK
Servomotor with
Holding Brake
24-V power supply or brake power supply
Fig. 205: Trial Operation - Releasing the Holding Brake
8.4 Trial Operation for the Servomotor without a Load
8.4.1 Overview
You use jogging for trial operation of the Servomotor without a load.
Jogging is used to check the operation of the Servomotor without connecting the SERVO-
PACK to the host controller. The Servomotor is moved at the preset jogging speed.
CAUTION!
During jogging, the overtravel function is disabled. Consider the range of
motion of your machine when you jog the Servomotor.
The tuning-less function is enabled as the default setting. When the
tuning-less function is enabled, gain will increase and vibration may occur
if the Servomotor is operated with no load. If vibration occurs, disable the
tuning-less function (Pn170 = n.  0).
Sigma-7 Series SERVOPACKs
Trial Operation and Actual Operation
Trial Operation for the Servomotor without a Load > Overview
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