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SERVO DRIVE UM Series DC Servo Control Installation & Operating Manual 4/00 MN1213...
Baldor assumes no responsibility for any errors that may appear in this document. Limited Warranty For a period of two (2) years from the date of original purchase, BALDOR will repair or replace without charge controls and accessories which our examination proves to be defective in material or workmanship.
Product Notice Intended use: These drives are intended for use in stationary ground based applications in industrial power installations according to the standards EN60204 and VDE0160. They are designed for machine applications that require variable speed controlled three phase brushless AC motors. These drives are not intended for use in applications such as: –...
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PRECAUTIONS: WARNING: Do not touch any circuit board, power device or electrical connection before you first ensure that power has been disconnected and there is no high voltage present from this equipment or other equipment to which it is connected. Electrical shock can cause serious or fatal injury. WARNING: Be sure that you are completely familiar with the safe operation of this equipment.
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AC power to these terminals may result in damage to the control. Caution: Baldor recommends not using “Grounded Leg Delta” transformer power leads that may create ground loops and degrade system performance. Instead, we recommend using a four wire Wye.
The Baldor UM series high frequency DC servo control provides performance with attention to economy. It is designed to operate a wide variety of Baldor DC brush type permanent magnet servo motors. The UM series control is a key component in motion control applications and provides 1 to six axes control.
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Functional Description The servo control consists of a power amplifier, a velocity control amplifier, and fault logic circuitry. Power Amplifier The power section of a PWM bridge normally acts as a low output impedance voltage source. However, if an analog signal representing motor current is applied to the input of the amplifier and a current command is present, the impedance of the PWM bridge then becomes high.
Section 3 Receiving and Installation Receiving & Inspection Baldor Controls are thoroughly tested at the factory and carefully packaged for shipment. When you receive your control, there are several things you should do immediately. Observe the condition of the shipping container and report any damage immediately to the commercial carrier that delivered your control.
Figure 3-1 Installing the Circuit Boards Electrical Installation All interconnection wires between the control, AC power source, motor, host control and any operator interface stations should be in metal conduits. Use listed closed loop connectors that are of appropriate size for wire gauge being used. Connectors are to be installed using crimp tool specified by the manufacturer of the connector.
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Figure 3-2 AC and DC Coil Noise Suppression RC snubber 0.47 mf DC Coil AC Coil Diode 33 W Control Enclosures Motor controls mounted in a grounded enclosure should also be connected to earth ground with a separate conductor to ensure best ground connection. Often grounding the control to the grounded metallic enclosure is not sufficient.
Input Power Transformer The UM series servo control requires an external isolation transformer that provides an ungrounded AC power source. • UM controls with a 100VDC bus require 70VAC nominal. • UM controls with a 150VDC bus require 105VAC nominal.
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Power Wiring Be sure to use the correct size wire for each connection. AC Input Power wires, Motor and the main ground wire should be the size stated in Table 3-1. The logic and fan power lines should be 16 AWG. 1 to 4 Axis Procedure (Refer to Figure 3-4).
Figure 3-5 Power Wiring 6 Axis 115VAC for logic & fan power Signal Wiring Input Signals (Refer to Figure 3-6). Connect the positive (+) tachometer wire (of the first servo motor) to the Tach (+) input (pin 5) of the Phoenix Connector for Axis 1. Connect the negative (–) side tachometer wire (of the first servo motor) to the Tach (–) input (pin 6) of the Phoenix Connector for Axis 1.
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Repeat steps 1, 2, 3 and 4 for each of the tachometers and be sure to use the Phoenix Connector for the correct Axis. Differential Command Input – Connect the input Velocity Command Signal to pin 1 and its return to pin 4. Ensure that jumper P2 is in its right most position (pins 1 and 2).
Optional Input Connections Current Monitor Interface (Connections are made at pins 7 and 11). Decoupled current sense (DCS) is an analog representation of amplifier current. Using an oscilloscope, a technician can look at output current of the amplifier. An analog output voltage of 1 volt peak to peak represents approximately 1/10 of peak current.
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Emergency Stop Some applications require a positive stop to disconnect the motor in the event of an emergency. A relay with 4 sets of contacts can be connected as shown in Figure 3-10 to provide the E stop function. Figure 3-10 Emergency Stop Connection MN1213 Receiving &...
Each axis should be started independently to minimize problems. The following procedure is for operating the UM series servo control in a velocity loop with a tachometer. To operate in current (torque) mode, refer Start–Up Torque Mode.
Start–Up Velocity Mode (Power On) Decouple all loads from the motors. Disconnect all axes except the first (axis 1) Switch on the Logic and Fan AC power input. Observe that the fan starts and three of the green LED’s on the logic power supply (+ 15V, –...
20. Connect the motor for the next axis. 21. Repeat steps 3 through 20 for each axis. 22. Turn off AC input power to the external isolation transformer and AC input power to the Logic & Fan input. 23. Connect the loads to each motor and turn power ON. 24.
Section 5 Troubleshooting Overview This troubleshooting guide describes the symptoms and provides information to check the causes of a fault and restore operation. Most of the faults can be identified by observing the four LED fault indicators on each servo control card and using a VOM.
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Table 5-1 Troubleshooting Symptom Corrective Action No torque in one direction. Check left or right limit switch wires to insure that they are not tied to common. Verify that the proper limit switches are used. Verify jumper P1 position. No output in either direction. Check interlock and reset wires to insure that they are not tied to common.
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Table 5-1 Troubleshooting Continued Symptom Corrective Action Low output voltage Check incoming power to logic power supply and verify that it is in from logic power supply. specified range. If in range, disconnect any external load on logic power and reset servo control. Check fuse on overvoltage protector.
Section 6 Specifications & Product Data Identification Complete Servo Control – – – UM X UM Series Input Connector S=Screw Terminal Chassis Size O=Original insulation displacement 2=Two Axes C=Competitor insulation displacement 4=Four Axes Quantity of UM3015H Control Cards 6=Six Axes...
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Chassis/Power Supply Assemblies Description Unit –100 –150 –100 –150 –100 –150 Rated Bus Input Nominal Rated Bus Input Range 20–77 20–115 20–77 20–115 20–77 20–115 Number of Phases 1 or 3 1 or 3 1 or 3 1 or 3 Logic &...
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MN1213 Specifications & Product Data 6-3...
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6-4 Specifications & Product Data MN1213...
Appendix A Personality Module Jumper and Personality Module Settings Personality Module Current Settings Refer to Figure A-1. The personality module allows you to calibrate the servo control. Resistors can be soldered to the module to select the upper limit values of the following: Peak Current Continuous Current Foldback Current...
Peak and Continuous Current Levels Adding a resistor reduces the set values from the specifications in Section 6. Peak / Continuous Current Levels Peak Continuous Ipeak (Amps) RP (Ohms) (Amps) RR (Ohms) UM1506HS–100 OPEN OPEN 42.2k 68.4k 17.4k 26.7k 10.2k 12.1k 6.81k 6.19k...
Record of “Set Up” Configuration It is highly recommended that a record be kept of the set up details for future reference. This will come in quite handy for new units, field replacements, and diagnostic aid. Using recorded values from similar set–ups will reduce installation time, and service can be conducted faster.
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