Table of Contents
Summary of Contents for Selema DC 4Q A Series
- Page 1 DC 4Q A Series Service Manual Precision Servodrive for DC Motors Precision Servodrive for DC motors DC 4Q A series Service manual Via Monari Sardè, 3 - Bentivoglio (BO) - Italia +390516640464 - Fax +390516640784 - www.selema-srl.it www.selema.it...
- Page 2 DC 4Q A Series Service Manual Agency approvals CE COMPLIANCE: 89/336/EEC Electromagnetic EN 55011 Compatibility EN 550082-1 98/37/EC Safety of Machinery EN 60204-1 The EC mark that is applied to the drives references to the Low Voltage Directive (2006/95/EC) and EC Directive on EMC (89/336/EC).
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Page 3: Table Of Contents
DC 4Q A Series Service Manual Index Chapter 1 1.1 Safety and note ......................... 4 1.2 Operation mode and feedback ....................5 1.3 Model and size .......................... 6 1.4 View product ..........................7 1.5 Ambient conditions ........................8 1.6 Ventilation ..........................8-9 1.7 Dimensions .......................... -
Page 4: Safety And Note
DC 4Q A Series Service Manual 1.1 Safety and note Caution Users must keep well clear in mind that this motion control equipment is capable of producing high forces and rapid movement so they must be used with attention especially during the application program’s development. -
Page 5: Operation Mode And Feedback
DC 4Q A Series Service Manual Operation mode and feedback Description This is a drive capable to drive DC brush motors, up to 3Nm. It's a High Performance full four quadrant drive servo amplifier. The mosfet output power stage is controlled by a 20 Khz PWM (Pulse Width Modulation) signal that allows it to drive servo motors where high dynamic performance and precise speed is required. -
Page 6: Model And Size
DC 4Q A Series Service Manual 1.3 Model and size Model available POWER SUPPLY Model 12 8 - 28 Vdc* 14Vdc** Model 65 20 - 84 Vdc* 60Vdc ** Model 100 30 - 130 Vdc* 100Vdc ** Model 130 35 - 165 Vdc*... -
Page 7: View Product
DC 4Q A Series Service Manual 1.4 View product Product Label Fixing screw Product Cover Solder bridges Adjustement zone Four calibration Potentiometers Four Leds TEST point (Encoder, Tacho or Armature velocity) M2 Signal terminal 5 pins MC1,5/5-ST-3,81 (pitch 3,81) (10) M1 Signal terminal 10 pins GMST 2.5/10-G-5,08 (pitch 5,08) (11) POWER Terminal 4 pins GMST 2.5/5-G-5,08 (pitch 5,08) -
Page 8: Ambient Conditions
DC 4Q A Series Service Manual 1.5 Ambient conditions Cable duct Dimensions are expressed in millimeters. 5,3" Conductive mounting panel (zinc coated) Cable duct Positioning in the electrical box Follow the instructions in the positioning of the servodrive in the electrical box. -
Page 9: Dimensions
DC 4Q A Series Service Manual Supplementary ventilation Mounting position V = Standard radiator+fan cooling below the converter (operating temperature 0 to +45°C) If you need the converter mounted horizontally, remove the cover. Mechanical dimensions Dimensions in mm and Inch... -
Page 10: Signals Input And Output
DC 4Q A Series Service Manual 2.0 Signals input and output The figure below shows the view of the converter terminals. M1 Signal terminal 10 pins "type GMST 2,5/10-G-5,08" M2 Signal terminal 5 pins "type MC 1,5/5-ST-3,81" POWER Terminals 4 pins "type GMST 2,5/4-G-5,08"... - Page 11 DC 4Q A Series Service Manual Signal inputs and outputs M1 CONNECTOR Fault drive, open collector output max. 50mA 1 FAULT (OUT) Normally closed, opens when the drive in protection mode REQ:, can be used in 2 distinct modes: 1) Motor Current limit mode (by REQ setting): A motor current limit mode connect an external resistor to GND reduces the maximun current.
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Page 12: Fault Output
DC 4Q A Series Service Manual 2.1 FAULT output (M1 signal terminal pin 1) Fault drive, open collector output max. 50mA Normally closed, opens when the drive in protection mode DRIVE 2.2 Current request (REQ) (M1 signal terminal pin 2) With a voltage (example from a CNC output) you can command the drive in torque mode. -
Page 13: Gnd Ground
DC 4Q A Series Service Manual Current output limitation With an external potentiometer connected from GND and REQ input, you have a limitation of output current (from zero to max. size) drive's. DRIVE External potentiometer (470K-1M Ohm) 3-10 TURNS The speed loop remains active and uses the input reference signal +/-VEL. -
Page 14: Ausiliary Power Supply +/-9.8V
DC 4Q A Series Service Manual 2.4 Ausiliary power supply +/-9.8V (M1 signal terminal pin 4 and 5) In the terminals 4 (+9.8 V) and 5 (-9.8V) are available auxiliary supplies to power the potentiometer reference speed. In the attached drawing below is also added a switch that allows the reversal of the rotation motor speed . -
Page 15: Analog Inputs
DC 4Q A Series Service Manual Analog inputs (+/-VEL) (M1 signal terminal pin 7 and 8) Differential reference The following diagram shows an application utilizing a differential reference from a C.N.C The +/-VEL in differential mode has a 40Kohm of impedance input. -
Page 16: Tachogenerator Input
DC 4Q A Series Service Manual 2.7 Tachogenerator input Tachogenerator input (M1 signal terminal pin 9 and 10) The following diagram shows the connection from tachogenerator and the drive DC ONE. This function is enabled through the following settings on the solder point, and the insertion of RDT resistance on the adjstustement zone. -
Page 17: Limit Switch Inputs
DC 4Q A Series Service Manual 2.10 Limit switch inputs t's possible to enable clockwise (CW) and counter-clockwise (CCW) motor rotation by connecting the +L.SW and -L.SW inputs. They may be used to block motor rotation when the machines overflow contact is intercepted. - Page 18 DC 4Q A Series Service Manual Limit switch inputs (continue) Example with internal positive voltage (+9.8V) Fig. 3 www.selema.it...
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Page 19: Power Supply Construction
DC 4Q A Series Service Manual 3.0 Power supply construction Normally the power supply is built by a transformer, a bridge rectifier and a filter capacity. Alternatively, the power supply can also be of switching type, in this case refer factory by the appropriate sizing. - Page 20 DC 4Q A Series Service Manual Power supply construction (continue) Example: Brush motor with the following data: In =5 (A) Ri = 1 (Ohm) E=48 (V) at nominal speed 3000 (RPM) Vdc motor = 48 + ( 1 * 5) = 53V VDC = 53 / 0,85 = 64V 64V is the VDC voltage request for the power supply.
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Page 21: Connections To Earth And Ground
DC 4Q A Series Service Manual 3.1 Connections to earth and ground Make sure that the servodrive and the motor are connected to earth in accordance with the current norms. This connection must be done by using a copper bar, mounted on insulating supports:... -
Page 22: Note About Connections
DC 4Q A Series Service Manual 3.2 Note about connections Multiple connection In the case of multiple servodrives on the same power supply, make connections-type stars, see drawing back. Connect also feed converters using the shortest cable possible. If the cable length exceeds 2m, twist the + and - leads together as twisted pairs. -
Page 23: Internal Adjustements
DC 4Q A Series Service Manual Internal adjustements The adjustments are located inside the converter. All calibration pins are mount on headers spaced. It ‘better to use a resistors with 1/4 watt (10,16mm) pitch and the capacitors (5.08mm) pitch Are also present, 11 solder bridges, through which you can enable or disable features or parts of the converter. -
Page 24: Brush Motor Connections With Encoder Feedback
DC 4Q A Series Service Manual 4.1 Brush motor with encoder feedback The following diagram shows an tipical application utilizing a Dc One with Brush motor. The + M and -M output are identified on the POWER connector of the product. - Page 25 DC 4Q A Series Service Manual Setting for Brush motor with encoder feedback In this configuration, the drive must set with the following Solder bridges and below internal setting: SOLDER BRIDGES ADJUSTEMENT ZONE Note: On the adjustement zone are not considered...
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Page 26: Brush Motor Connections With Tachogenerator Feedback
DC 4Q A Series Service Manual 4.2 Brush motor with tachogenerator The following diagram shows an tipical application utilizing a Dc One with Brush motor. The speed loop velocity is by tachogenerator feedback. Signals from the encoder are connected only to the CNC for the control of space loop. - Page 27 DC 4Q A Series Service Manual Setting for Brush motor with tachogenerator In this configuration, the drive must set with the following solder bridges and below internal setting: SOLDER BRIDGES ADJUSTEMENT ZONE Solder Bridges set for: Note: On the adjustement zone are not considered...
- Page 28 DC 4Q A Series Service Manual 4.3 Brush motor in armature feedback The following diagram shows an tipical application utilizing a Dc One with Brush motor. The speed loop velocity is by internal armature feedback. In the armature voltage PWM converter is used as the internal feedback of speed, when the motor has not an encoder.
- Page 29 DC 4Q A Series Service Manual Setting for Brush motor with armature In this configuration, the drive must set with the following solder bridges and below internal setting: SOLDER BRIDGES ADJUSTEMENT ZONE Solder Bridges set for: Note: On the adjustement zone are not considered...
- Page 30 DC 4Q A Series Service Manual Setting for Brush motor with armature (Continue) RCA resistor calculations Insert an RCA resistor on the header (ajustement zone) to compensate for voltage loss due to the motor resistance reducing the loss of RPM.
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Page 31: Current Adjustments
DC 4Q A Series Service Manual Current adjustement RIN resistor (rated current adjustment) Resistance RIN limits the value of the rated current supplied by the drive. Normally has the same value, of the stall current of DC motor. For the calculation see the following table:... -
Page 32: Ramp Time Adjustments
DC 4Q A Series Service Manual Ramp time adjustement The product is standard setting with this feature is not enabled (solder bridge S3 open) To enable the ramp acceleration close the solder bridge S3 and insert the RACC resistance. NOTE: The product comes standard with mounted 470ohm resistance value (0.8 sec ramp) -
Page 33: Potentiometer Adjustments
DC 4Q A Series Service Manual Potentiometer adjustements The converter is equipped with 4 trimmer with the following meanings: FUNCTION Motor fine speed calibration. With rotating clockwise (CW) or counterclockwise SPEED (CCW) is possible increase / decrease the speed of the motor with range + / -25% Offset adjustment. -
Page 34: Dynamic Adjustments
DC 4Q A Series Service Manual 4.7 Dynamic adjustement The multi-turn GAIN and DERIV trimmer allow to dynamically tune of the motor and its mechanics linked to it. These trimmers have full excursion from minimum to maximum, with 15 turns of rotation of the same. -
Page 35: Indicator Leds And Protections
DC 4Q A Series Service Manual Indicator Leds and protections The protections are all displayed by five LEDs on the front of the drive. It also comes with a series of protections designed to safeguard in case of malfunction, the drive and the motor. - Page 36 DC 4Q A Series Service Manual White page www.selema.it...
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