Yaskawa ∑ - II Servo Drive Debugging Guide

Yaskawa ∑ - II Series SGMBH/SGDH Servo Drivers: A Complete Technical Manual from Installation to Advanced Debugging

In the fields of high-end mechanical manufacturing, large-scale automated production lines, and precision positioning control, 400V level high-power servo systems play a core driving role. The combination of SGMBH servo motors (22-55 kW) and SGDH servo drives (SERVOPACK) in the Yaskawa ∑ - II series is widely used in presses, injection molding machines, large gantry machines, and wind pitch systems due to its high response, high precision, and rich control modes (speed, position, torque). This article is based on the original factory technical manual and provides a comprehensive operation guide for on-site engineers, system integrators, and maintenance personnel, covering hardware installation, main circuit wiring, parameter initialization, trial operation, gain adjustment, and fault diagnosis.

Chapter 1: Product Overview and Acceptance Inspection

1.1 System composition

The ∑ - II series 400V servo drive system consists of SGMBH servo motors (synchronous type, rated speed of 1500 min ⁻¹, maximum speed of 2000 min ⁻¹, maximum torque of 200%) and SGDH SERVOPACK (speed/torque/position control optional). The motor is equipped with a 17 bit incremental or absolute encoder (optional 20 bit absolute).

1.2 Open box inspection

After receiving the product, it is necessary to confirm:

Does the servo motor match the SERVOPACK model (see manual combination specification table, such as SGDH-2BD with SGDH-2BE).

Can the motor shaft be smoothly rotated manually (motors with brakes cannot be manually rotated).

Check for any transportation damage to the appearance and loose screws.

Check the nameplate data: voltage level (400V level), rated current, serial number, etc.

1.3 Storage Environment

Servo motor: -20~60 ℃.

SERVOPACK: -20~85 ℃.

Humidity: below 90% RH (no condensation).

Chapter 2: Installation and Mechanical Connection - Ensuring Long term Reliable Operation

2.1 Installation of servo motor

SGMBH motors can be installed horizontally or vertically. Before installation, it is necessary to remove the anti rust coating on the shaft end with diluent (to avoid contact with other parts). The installation surface must meet the following requirements:

Concentricity: The concentricity between the flange mating surface and the output shaft is T.I.R. ≤ 0.05 mm.

Verticality: The verticality T.I.R. between the flange surface and the output shaft is ≤ 0.05 mm.

Shaft runout: Shaft end runout T.I.R. ≤ 0.03 mm.

2.2 Allowable radial/axial loads

When designing a mechanical system, the radial load (Fr) and axial load (Fs) borne by the shaft end shall not exceed the following table:

Motor model allows radial load Fr (N) and axial load Fs (N), with a distance of LR (mm) from the point of application

SGMBH-2BD 5880 2156 100

SGMBH-3ZD 6272 2156 100

SGMBH-3GD 7448 2156 100

SGMBH-4ED 7840 2156 100

SGMBH-5ED 8428 2156 110

Important: Exceeding the allowable load can cause bearing damage or encoder failure. It is strictly prohibited to directly impact the shaft end when installing the coupling.

2.3 Motor fan and thermal protection

The SGMBH motor comes with a fan, which needs to be connected to a three-phase 380-480V power supply (terminals U (A), V (B), W (C)), and ensure that the wind direction is correct (switch the two phases arbitrarily when reversing). The fan is equipped with a built-in thermal protector (operating temperature 140 ℃± 5%), which needs to be used in conjunction with a 2A non fuse circuit breaker. The internal thermostat of the motor (terminals 1 and 1b) must be connected to the control circuit, and the main power or servo must be cut off when the thermostat is activated.

2.4 SERVOPACK Installation

SGDH is a base mounted type that must be installed vertically and meet the following spacing requirements:

At least 50 mm up and down, and at least 10 mm left and right.

The ambient temperature is 0-55 ℃, the humidity is ≤ 90% RH, and the vibration is ≤ 4.9 m/s ².

When multiple units are installed side by side, a cooling fan needs to be installed at the top to ensure that the temperature inside the cabinet does not exceed 45 ℃ (long-term reliability).

2.5 Power loss reference

SERVOPACK model main circuit loss (W) control circuit loss (W) total loss (W)

SGDH-2BDE 650 120 770

SGDH-3ZDE 880 170 1090

SGDH-3GDE 1050 140 1260

SGDH-4EDE 1350 150 1560

SGDH-5EDE 1600 180 1840

Chapter 3: Wiring of Main Circuit and Control Circuit - Safety and Anti Interference

3.1 Definition of main circuit terminals

Terminal symbol function description

L1/R, L2/S, L3/T main power input three-phase 380~480VAC ± 10%, 50/60Hz

U. V, W motors are connected to servo motors U, V, W

DC24P, DC24N control power input 24VDC ± 15%

+1. Connect the+2 DC reactor to the factory short-circuit for harmonic suppression

B1 and B2 regenerative resistors are connected to external regenerative resistor units

DU, DV, DW dynamic braking unit connection for models of 37kW and above

DBON, DB24 dynamic braking unit controls models of 37kW and above

3.2 Typical Wiring Example (22/30kW)

The main power supply is connected to L1/L2/L3 through MCCB (recommended 100-150A) and electromagnetic contactor (MC).