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19

Application Notes

Independent adjustable speeds

Replace the speed adjust potentiometer with a single pole, multi-
position switch, and two or more potentiometers in parallel, with
a total parallel resistance of 10K ohms. Figure 13 shows the
connection of two independent speed adjust potentiometers that
can be mounted at two separate operating stations.

Figure 13. Independent Adjustable Speeds

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Содержание M1740009.OO

Страница 1: ...USER S MANUAL M1740009 OO Pulse Width Modulated Adjustable Speed Drives for DC Brush Motors...

Страница 2: ...without notice Leeson Corporation and its Divisions make no warranty of any kind with respect to this material including but not limited to the implied warranties of its merchantability and fitness fo...

Страница 3: ...uipment Reduce the chance of an electrical fire shock or explosion by proper grounding over current protection thermal protection and enclosure Follow sound maintenance procedures It is possible for a...

Страница 4: ...e fuse 5 Speed adjust potentiometer 6 Quick connect terminal block 7 Connections 8 Voltage follower 9 Operation 10 Startup 10 Diagnostic LEDs 11 Line starting and line stopping 11 Inhibit switch 12 Dy...

Страница 5: ...ltiple fixed speeds 17 Adjustable speeds using potentiometers in series 18 Independent adjustable speeds 19 RUN JOG switch 20 Reversing 21 Troubleshooting 22 Block Diagrams 25 Limited Warranty inside...

Страница 6: ...e Follower Connections 9 7 Diagnostic LEDs 11 8 Inhibit Switch 12 9 Dynamic Brake Connection 13 10 Typicqal TORQUE and IR COMP settings 16 11 Multiple Fixed Speeds 17 12 Adjustable Fixed Speeds Using...

Страница 7: ...age 0 130 VDC Maximum Continuous Armature Current 2 ADC Form Factor at base speed 1 05 Acceleration Time with load 1 second Deceleration Time with load 2 seconds Analog Input Voltage Range isolated S1...

Страница 8: ...2 Dimensions Figure 1 M1740009 OO Dimensions...

Страница 9: ...Operate the drive within the specified ambient operating temperature range Prevent loose connections by avoiding excessive vibration of the drive Mount drive with its board in either a horizontal or v...

Страница 10: ...y from power carrying lines or sources of electrical noise that can cause erratic operation Never run speed adjust potentiometer or inhibit wires in the same conduit as the motor and AC line voltage w...

Страница 11: ...ot have to be resized as long as the motor used is within the drive s specified horsepower range The fuse is mounted in the fuseholder see Figure 2 To replace a blown fuse use a screwdriver to turn th...

Страница 12: ...the 10K ohm speed adjust potentiometer Twist the speed adjust potentiometer wire to avoid picking up unwanted electrical noise If potentiometer leads are longer than 18 in 457 mm use shielded cable se...

Страница 13: ...plug from header block 2 With a small flat head screwdriver turn terminal plug screw counterclockwise to open wire clamp 3 Insert stripped wire into the large opening in front of the plug 4 Turn the...

Страница 14: ...is assumed throughout this manual that when A1 is positive with respect to A2 the motor will rotate clockwise CW while looking at the output shaft protruding from the front of the motor If this is op...

Страница 15: ...ive may be wired to follow a 0 5 VDC voltage signal that is isolated from earth ground Figure 6 Connect the signal input to S2 Connect the signal common to S1 Make no connection to S3 A potentiometer...

Страница 16: ...peed adjust potentiometer clockwise CW If the drive is following a voltage signal slowly increase the voltage signal The motor will slowly accelerate as the speed adjust potentiometer is turned CW or...

Страница 17: ...LIM Red LED lights whenever the drive reaches current limit 11 Operation Line starting and stopping Line starting and stopping applying and removing AC line voltage is recommended for infrequent star...

Страница 18: ...switch An inhibit switch allows the motor to decelerate to zero speed when the switch is closed Connect a single pole single throw switch between H1 and H2 see Figure 8 Close the switch to decelerate...

Страница 19: ...ssary since the armature resistance is high enough to stop the motor without demagnetization In this case replace the dynamic brake resistor with 12 gauge wire m Warning Wait for the motor to complete...

Страница 20: ...the motor speed when the speed adjust potentiometer is turned full CCW It is factory set for zero speed To calibrate turn the speed adjust potentiometer full CCW Adjust the MIN SPD trimpot until the m...

Страница 21: ...tings in Figure 10 or recalibrate using the following procedure If the motor does not maintain set speed as the load changes gradually rotate the IR COMP trimpot CW If the motor oscillates overcompens...

Страница 22: ...the motor armature Be sure that the motor is firmly mounted 5 Set the speed adjust potentiometer to maximum full CW 6 Adjust the TORQUE trimpot CW slowly until the armature current is 120 of motor ra...

Страница 23: ...he speed adjust potentiometer with series resistors with a total series resistance of 10K ohms Figure 11 Add a single pole multi position switch with the correct number of positions for the desired nu...

Страница 24: ...djust potentiometer with a single pole multi position switch and two or more potentiometers in series with a total series resistance of 10K ohms Figure 12 shows a connection for fixed high and low spe...

Страница 25: ...single pole multi position switch and two or more potentiometers in parallel with a total parallel resistance of 10K ohms Figure 13 shows the connection of two independent speed adjust potentiometers...

Страница 26: ...single pole single throw switch for the RUN JOG switch and a single pole normally closed momentary operated pushbutton for the JOG pushbutton see Figure 14 When the RUN JOG switch is set to JOG the m...

Страница 27: ...or direction Figure 18 Use a three pole three position switch rated for at least the maximum DC armature voltage and maximum braking current Wait for the motor to stop completely before switching it t...

Страница 28: ...is section Disconnect AC line voltage from the drive Check the drive closely for damaged components Check that no conductive or other foreign material has become lodged on the printed circuit board Ve...

Страница 29: ...at the motor is not jammed It may be necessary to increase the TORQUE setting if it is set to a value lower than the current rating of the motor Fuses or circuit breaker blows 1 Check all wiring for s...

Страница 30: ...d 1 Check that the drive has been correctly calibrated for the motor 2 Check that the motor is not overloaded 3 Readjust the IR COMP slightly CW until motor runs at proper speed Motor is unstable unde...

Страница 31: ...25 Block Diagrams Figure 16 Block Diagram...

Страница 32: ...26 Block Diagrams Figure 22 Input Circuit Diagram...

Страница 33: ...Notes 27...

Страница 34: ...Notes 28...

Страница 35: ...led C Limitations of Liability In the event of any claim for breech of any of the Corporation s obligations whether express or implied and particularly of any other claim or breech of warranty contain...

Страница 36: ...2100 Washington Street Grafton WI 53024 0241U S A Phone 414 377 8810 Fax 414 377 3440 Document Number 250 0256 Revision 0 Printed in the U S A 4 96 U S A 12 00 Canada 13 00...

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