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Minarik DIGI-LOK DLC300 User Manual

Programmable digital control
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USER'S MANUAL
Model DLC300/DLC400
DIGI-LOK ® Programmable Digital Control

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Summary of Contents for Minarik DIGI-LOK DLC300

  • Page 1 USER’S MANUAL Model DLC300/DLC400 DIGI-LOK ® Programmable Digital Control...
  • Page 2 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 for a given purpose. Minarik Corporation and its Divisions assume no responsibility for any errors that may appear in this manual and make no commitment to update or to keep current the information in this manual.

  • Page 3: Safety Warnings

    Follow sound maintenance procedures. It is possible for a drive to run at full speed as a result of a component failure. Minarik strongly recommends the installation of a master switch in the main power input of the drive controllng the motor to stop the drive in an emergency.

  • Page 5: Table Of Contents

    Contents Specifications Dimensions Installation Mounting ........... .5 Wiring .
  • Page 6 Illustrations Figure 1. DLC300/400 Dimensions ........3 Figure 2.
  • Page 7 Introduction Minarik Models DLC300 and DLC400 Digi-Lok® Converters are used with conventional analog speed controls to produce closed- loop digital systems capable of controlling motor speed precisely and with excellent reproducibility. The Digi-Lok® Converter (DLC) receives the feedback signal generated by a sensor that monitors a rotating element driven by the motor.
  • Page 8 With few exceptions, speed controls currently being manufactured meet this requirement. A few older design speed control models, including Minarik Models SL31UD4 and SL51UD4, operate with a negative reference voltage. Such controls will require use of Model DLC100 instead of the DLC300.
  • Page 9 As an example, consider an application in which the feedback source is monitoring a driven shaft, and not the motor armature shaft. This shaft is to be run at speeds as low as 1 rpm. The feedback device that you select must produce at least 600 pulses per revolution.
  • Page 10 viii...

  • Page 11: Specifications

    Specifications Line input voltage, 50-60 Hz, single phase DLC300 115 VAC (+/-10%) DLC400 230 VAC (+/-10%) Line power 5.5 watts nominally Acceptable feedback sources 5V NPN-type encoder 5V NPN-type proximity switch Hall effect sensor Electromagnetic pickup device Feedback frequency range...

  • Page 13: Dimensions

    Dimensions ALL DIMENSIONS IN INCHES [MILLIMETERS] Figure 1. DLC300/400 Dimensions...

  • Page 15: Installation

    Mounting Motor speed controls manufactured by other companies may require hookup procedures that differ from those given in this manual. Please contact your Minarik representative for assistance. A schematic diagram and the manufacturer’s instructions for interfacing the control with an external speed-setting signal will probably be required before the correct wiring scheme can be determined.

  • Page 16: Wiring

    Variable speed DC drives manufactured by other companies may require hookup procedures that differ from those given in this manual. Contact your local Minarik branch or distributor for assistance. A schematic diagram and the manufacturer’s instruction for interfacing the drive with an external speed-setting signal may be required before the correct wiring scheme can be determined.

  • Page 17: Shielding Guidelines

    Under no circumstances should power and logic leads be bundled together. Induced voltage can cause unpredictable behavior in any electronic device, including motor controls. As a general rule, Minarik recommends the shielding of all conductors. If it is not practical to shield power conductors, Minarik recommends shielding all logic-level leads.

  • Page 18: Panel Installation

    Installation Panel installation Step 1. Cut a rectangular hole in the panel 1.73 inches (44 mm) high, and 3.38 inches (86 mm) wide. 1.74 [44]...
  • Page 19 Installation Step 2. Slide the DLC3/400 into the panel opening. PANEL DLC300/400...
  • Page 20 Installation Step 3. Insert the two mounting brackets into each side of the DLC300/400 case.
  • Page 21 Installation Step 4. Secure the DLC300/400 to the panel using the bracket screws. Do not overtighten the screws, or damage to the enclosure may result.

  • Page 22: Dip Switch Settings

    Installation DIP Switch Settings The DLC is set at the factory to receive magnetic pickup feedback. If your application does not use a magnetic pickup, you must reset two board-mounted DIP switches located just inside the case and behind the signal input terminals. Reset these DIP switches before you connect the DLC unit to AC power.

  • Page 23: Connections

    Installation Connections Feedback signal Terminals marked IN and COM accept the feedback signal input. Connect the signal lead to IN and the common lead to COM. The terminal marked "+ 5" is a + 5VDC power supply output available to drive an encoder feedback device. Leads from an electromagnetic pickup device have no fixed polarity.
  • Page 24 Installation Line voltage connections Warning Positive disconnects in the AC supply to the speed control unit itself must be in place to ensure an emergency shutdown of the entire system. Merely disconnecting the DLC unit will not provide adequate safeguard against a runaway condition. Connect earth ground to Terminal G.

  • Page 25: Figure 3. Dlc300/400 Connections

    Installation Figure 3. DLC300/400 connections...

  • Page 27: Calibrating The Speed Control

    Programming Instructions Calibrating the speed control Warning It is very important that the drive attached to the Digi-Lok be properly calibrated for its motor–with one exception. The IR COMP (regulation) trimpot must be set to zero (full CCW). Calibrate the motor speed controller for use with the DLC. The objective is to optimize the response of the speed control to the DLC signal and to minimize any tendency by the speed control to independently attempt to regulate motor speed.

  • Page 28: Programming Mode

    Programming Instructions Programming Mode Programming can be done before the DLC is installed, or before it is connected to the speed controller, or after the entire system is set up. Usually, it is more convenient to program the DLC before it is connected to the speed controller, because the motor will not then be running.

  • Page 29: Speed Scaling Factor

    Programming Instructions As the Digi-Lok® Converter senses any deviation from set speed, its output to the speed control will be changed to bring the actual motor speed back to set speed. The selected Load Response Number determines the rate at which the DLC output voltage is changed, for a given difference between set speed and actual speed.
  • Page 30 Programming Instructions The governing equation is: SSF= [(SPEED SETTING)/(SHAFT RPM)] X [3000/PPR] [1] Select any speed setting and the corresponding shaft rpm. The entire numerical speed setting entry has to be used in this equation. Delete the decimal point, if present. The number of feedback pulses per revolution is known.

  • Page 31: Load Response Number

    Programming Instructions If you already have enabled the Programming Mode, the DLC display will show 0050. - the factory-set SSF value of 50. The number of decimals displayed in Programming Mode tells which parameter is being displayed. One decimal point signifies SSF programming.
  • Page 32 Programming Instructions If your application does not run properly, as evidenced by failure to lock into speed, you first need to check that shock loading is not occurring. The DLC system cannot compensate for the perturbations that shock loading creates. If the speed oscillates rapidly and with wide amplitude about the set point, reduce the load response number slightly and evaluate the results.

  • Page 33: Display Scaling Factor

    Programming Instructions The numbers roll over at 30 and at 0. When the correct load response number is displayed, you have completed this stage. Press ENTER once to move from this screen to the Display Scaling Factor screen. Display Scaling Factor The Display Scaling Factor (DSF) is seen when the DLC programming display contains 3 decimal points.
  • Page 34 Programming Instructions The display scaling factor (DSF) equals this gate time expressed as the number of 'ticks' of the DLC 50 Hz internal clock. Mathematically, DSF = 50 x GT Combining equations [4] and [5], we arrive at the final equation: DSF = [(SPEED DISPLAY) / (SHAFT RPM)] x (3000 / PPR) [6] Equation [6] is identical in its form to equation [1], the speed scaling factor equation.
  • Page 35 Programming Instructions As gate times get longer than approximately 3 seconds, they will become less than acceptable, since the delay between consecutive updates begins to mask speed changes that may occur. Try to settle on a gate time that is less than approximately three seconds. An acceptable DSF value must lie between 25 and 150 for the gate time to be between 0.5 and 3 seconds.

  • Page 36: Decimal Point Location

    Decimal point location The decimal point location number is shown when the programming display itself contains four decimal points. There are four available settings: Screen setting Decimal point display 0.0.0.0 1800 0.0.0.1 180.0 0.0.0.2 18.00 0.0.0.3 1.800 Use the UP and DOWN push-buttons to change the decimal point location number.

  • Page 37: Exit The Programming Mode

    Exit the Programming Mode When you exit the Programming Mode, all the values you have programmed will be saved to the EEPROM. Press and hold the ENTER button while pressing the UP push-button. Release both push-buttons simultaneously. You will see the scaled speed displayed if you have properly executed this transition.

  • Page 39: Troubleshooting

    • Verify that there are no short circuits or grounded connections. • Check that the drive’s rated armature outputs are consistent with the motor ratings. For additional assistance, contact your local Minarik® distributor, or the factory direct at: 1-800-MINARIK (646-2745) (phone) or 1-800-394-6334 (fax).
  • Page 40 DLC system. The more common problems are described below. Should your DLC fail to operate as it should after you have taken the suggestions found in this list, contact your Minarik salesperson for technical assistance. If the motor will not run: 1.
  • Page 41 Troubleshooting 3. The clamping resistor on the DLC may be dragging the output if the control already has its own circuit with a clamping resistor between the wiper and CCW terminals. Remove the connection between DLC terminal S1 and the CCW terminal on the speed control.
  • Page 42 Troubleshooting 2. Verify that the speed control board common is coupled to DLC. terminal S1. 3. The speed control may be defective. Replace the DLC with the speed pot and check whether the motor runs properly. 4. The OPTO/MAG DIP switches may not be set correctly. Check to make sure you have correctly calculated and programmed the speed scaling factor (SSF) and display scaling factor (DSF).

  • Page 43: Unconditional Warranty

    Unconditional Warranty A. Warranty Minarik Corporation (referred to as “the Corporation”) warrants that its products will be free from defects in workmanship and material for twelve (12) months from date of manufacture thereof. Within this warranty period, the Corporation will repair or replace such products that are returned to Minarik Corporation, 901 East Thompson Avenue, Glendale, CA 91201-2011 USA.
  • Page 44 901 East Thompson Avenue Glendale, California 91201-2011 Tel:1-800-MINARIK (646-2745) Fax: 1-800-394-6334 www.minarikcorp.com Document number 250–0112, Revision 3 Printed in the U.S.A – 7/00 $12.00 North America, $13.00 Outside North America...

This manual is also suitable for:

Digi-lok dlc400

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