USER`S MANUAL - Minarik Drives

USER`S MANUAL - Minarik Drives
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USER’S MANUAL
Model DLC300/DLC400
DIGI-LOK® Programmable Digital Control
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Copyright  2000 by
Minarik Corporation
All rights reserved. No part of this manual may be reproduced or transmitted in any
form without written permission from Minarik Corporation. The information and
technical data in this manual are subject to change without notice. Minarik
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.
Printed in the United States of America.
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Safety Warnings
• This symbol denotes an important safety tip or warning.
Please read these instructions carefully before performing
any of the procedures contained in this manual.
•
DO NOT INSTALL, REMOVE, OR REWIRE THIS
EQUIPMENT WITH POWER APPLIED. Have a qualified
electrical technician install, adjust and service this equipment.
Follow the National Electrical Code and all other applicable
electrical and safety codes, including the provisions of the
Occupational Safety and Health Act (OSHA), when installing
equipment.
•
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 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.
Circuit potentials are at 115 VAC or 230 VAC above earth
ground. Avoid direct contact with the printed circuit board or
with circuit elements to prevent the risk of serious injury or
fatality. Use a non-metallic screwdriver for adjusting the
calibration trimpots. Use approved personal protective
equipment and insulated tools if working on this drive with
power applied.
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Contents
Specifications
1
Dimensions
3
Installation
5
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Shielding guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Panel installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
DIP Switch Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
Calibrating the speed control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Programming Instructions
Programming Mode . . . . . . . .
DLC programming parameters
Speed Scaling Factor . . . . .
Load Response Number . .
Display Scaling Factor . . . .
Decimal point location . . . .
Exit the Programming Mode
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17
.18
.18
.19
.21
.23
.26
.27
Troubleshooting
29
Before troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
Unconditional Warranty
33
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Illustrations
Figure 1. DLC300/400 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Figure 2. DIP Switch Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Figure 3. DLC300/400 connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
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Introduction
Minarik Models DLC300 and DLC400 Digi-Lok® Converters are
used with conventional analog speed controls to produce closedloop 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. The sensor assembly can be a magnetic pickup with
ferromagnetic gear, or a NPN-type optical encoder or inductive
proximity switch, or a Hall effect sensor with magnetic wheel.
An important distinction exists between any Digi-Lok®
Converter system and a conventional servo drive. The Digi-Lok
Converter reads a velocity-dependent feedback signal and corrects
its output to bring the motor back to its set speed. The Digi-Lok®
Converter will not compensate for any positioning errors caused
by very minor speed fluctuation.
Industrial applications for Digi-Lok® Converter control systems
include many within the food processing, chemical, and
pharmaceutical industries, for example. Blending, mixing,
grinding, pumping, and other such processes often require strict
repeatability to ensure product uniformity. The digital speedsetting feature of the Digi-Lok® Converter and the closed-loop
design provide that reliability and reproducibility.
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DLC Compatibility
The DLC is compatible with positive reference-voltage speed
controls only – controls that drive the motor when the speed
adjust pot wiper is at a positive potential relative to the CCW side
of the speed adjust pot.
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.
Feedback device selection
Acceptable feedback frequency at any set speed in an application
must lie within the 10-2000 Hz range. Feedback frequency is
directly proportional to the number of feedback pulses per
revolution (PPR) and to the speed of the shaft (RPM) that the
feedback transducer monitors.
Since the application requirements determine the shaft speed
range, they also will determine the range within which the
number of feedback pulses per revolution must lie:
PPRminimum = 600/(RPMminimum)
PPRmaximum = 120,000/(RPMmaximurn)
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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.
Conversely, if the application were one that required monitoring
and controlling a driven shaft at speeds as high as 4000 rpm, the
feedback device would be limited to one that produced 30 or
fewer pulses per revolution.
The Digi-Lok® Converter system can control armature shaft
speeds within a 30:1 range. Under no circumstances can the DLC
be expected to control motor speed beyond the speed rating of the
motor.
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1
Specifications
Line input voltage, 50-60 Hz, single phase
DLC300
DLC400
Line power
Acceptable feedback sources
5V NPN-type encoder
5V NPN-type proximity switch Hall effect sensor
Electromagnetic pickup device
Feedback frequency range
Maximum speed range
Speed control reference voltage, maximum
Ambient operating temperature
Approximate weight
115 VAC (+/-10%)
230 VAC (+/-10%)
5.5 watts nominally
10-2,000 Hz
30:1 typical
+ 20 VDC
10ºC to 40ºC
1 lb.
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Dimensions
ALL DIMENSIONS IN INCHES [MILLIMETERS]
Figure 1. DLC300/400 Dimensions
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Installation
Warning
Do not install, rewire, or remove this control with input
power applied. Doing so may cause fire or serious injury.
Make sure you have read and understood the Safety
Warnings before attempting 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.
Install the Digi-Lok Converter in an area that is protected from
exposure to dirt or moisture and from accidental contact. Provide
clearance that permits access for connecting wires. Do not mount
the device near other heat-producing objects, nor in an area
subject to cold and moisture. Ambient temperature within the
range of 10º to 40ºC must be maintained.
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Installation
Wiring
Warning
Do not install, remove, or rewire this equipment with power
applied. Failure to heed this warning may result in fire,
explosion, or serious injury.
Circuit potentials are at 115 or 230 VAC above ground. To
prevent the risk of injury or fatality, avoid direct contact with
the printed circuit board or with circuit elements.
Do not disconnect any of the motor leads from the motor
control unless power is removed. Opening any one motor
lead may destroy the control.
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.
• Use 16–20 AWG wire for speed adjust potentiometer wiring.
Use 14–16 AWG wire for AC line (L1, L2) and motor (A1 and
A2) wiring.
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Installation
7
Shielding guidelines
Warning
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. If shielding is not
practical, the user should twist all logic leads with themselves to
minimize induced noise.
It may be necessary to earth ground the shielded cable. If noise is
produced by devices other than the drive, ground the shield at the
drive end. If noise is generated by a device on the drive, ground
the shield at the end away from the drive. Do not ground both
ends of the shield.
If the drive continues to pick up noise after grounding the shield,
it may be necessary to add AC line filtering devices, or to mount
the drive in a less noisy environment.
Logic wires from other input devices, such as motion controllers
and PLL velocity controllers, must be separated from power lines
in the same manner as the logic I/O on this drive.
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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]
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Installation
Step 2. Slide the DLC3/400 into the panel opening.
PANEL
DLC300/400
9
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Installation
Step 3. Insert the two mounting brackets into each side of the
DLC300/400 case.
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Installation
11
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.
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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.
If the near end of the DIP switch is down, that switch is ON; if
up, that switch is OFF. Use a narrow non-metallic screwdriver or
similar instrument to set the DIP switches. For other than
magnetic pickup feedback devices, set OPTO (left DIP switch)
ON and MAG (right DIP switch) OFF.
Figure 2. DIP Switch Location
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Installation
13
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. These leads may be connected to the IN and COM
terminals in either order.
To avoid signal distortion, twist the feedback leads. For those
installations that require leads longer than approx. 18 inches, use
shielded leads with the shield grounded only at the transducer.
Good installation practice dictates that you run feedback leads,
Digi-Lok® output leads, and motor leads in separate conduits.
Digi-Lok Converter output
Terminals S1, S2, and S3 are the DLC output terminals. Connect
Sl to the terminal normally assigned to the CCW side of the speed
pot, S2 to the speed pot wiper terminal, and S3 to the speed pot
CW terminal. If the speed control already has a clamping resistor
between its wiper and CCW terminals, only connect DLC
terminals S2 and S3 to the control terminals. The motor speed
controller must use a positive reference voltage in its speed
setting circuit.
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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. Wire AC power to
Terminals L1 and L2.
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Installation
Figure 3. DLC300/400 connections
15
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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.
Set the control's Maximum Speed trimpot to its maximum
setting. Set the control’s Minimum Speed trimpot to its
minimum setting.
Adjust the speed control to its maximum rate of acceleration
(and deceleration), to obtain its most rapid response to speed
setting commands. Lower the IR COMP (REGULATION)
setting to its minimum setting. The motor control then will be
able to respond almost transparently to the DLC commands.
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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.
Press the front panel push-button marked "E" (ENTER) at the
same time that you power the DLC unit and it will be put into its
Programming Mode. If the DLC is already powered up, you must
interrupt power and hold in the ENTER push-button while
restoring AC power.
DLC programming parameters
Four parameters must be programmed into the Digi-Lok®
Converter. Three parameters can be programmed without running
the motor. The Speed Scaling Factor correlates the digital speed
set at the DLC with the desired speed at the feedback shaft. The
Display Scaling Factor correlates the numerical value displayed
by the DLC with the rpm at the feedback shaft. The Decimal
Point Location Number fixes the position of a decimal point
within the DLC display.
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Programming Instructions
19
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. The higher the value of the Load Response Number, the
faster the Digi-Lok® Converter will respond.
The proper DLC Load Response Number must be selected
empirically. It is the value that enables the DLC system to
respond as rapidly as possible without "hunting" or rapidly
oscillating about its set point. Typically, there will be a range of
load response numbers that gives satisfactory load response, so it
is not necessary to determine its precise value. Any
reprogramming from the factory setting is indicated only when
and if system response needs to be improved.
Speed Scaling Factor
The DLC can be programmed to accept speed settings in units
numerically different from actual shaft rpm, e.g., in feet per
minute, or gallons per minute. Its feedback signal can originate
from a device possessing almost any number of pulses per
revolution, depending only upon the operating speed range. This
flexibility is made possible through use of the Speed Scaling
Factor (SSF).
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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. Substitute these values
into Equation 1 and calculate SSF. Round off this value to the
nearest whole number. Any value from 1 through 9999 can be
accepted as the DLC Speed Scaling Factor.
The DLC is set at the factory for use with a 60 pulse-perrevolution feedback device. It is set for entering directly the speed
of the monitored shaft in rpm. By Equation 1, then, the correct
value for the Speed Scaling Factor under these conditions is 50.
Assume that you need to calculate the SSF for an application
involving a different set of parameters: A 100-line encoder is
mounted on a pinch roller shaft. Speed is to be set in feet per
minute, to one decimal place. A setting of 180.0 fpm is equivalent
to the roller rotating at 120 rpm. Substituting into Equation 1:
SSF = [(1800)/(120)] X [3000/100] = 450
Notice that the first term substituted into the equation is "1800",
not "180.0". Always drop the decimal point, if there is one, when
using the speed setting value in this equation.
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Programming Instructions
21
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.
If the display shows more than a single decimal point, you are
viewing the wrong programming screen. Bring the display back to
the one showing just one decimal point. Do this by pressing
ENTER once, twice, or three times, to scroll to the correct
screen.
Change the SSF value by pressing the UP push-button to
increment the displayed value, or the DOWN push-button to
decrement it. Each time the push-button is pressed, the SSF value
will change by one unit. To accelerate this rate of change, hold in
the push-button continuously until you get close to the desired
value. Release the push-button. You will be able to make unit
increments again with successive presses of the push-button.
Press ENTER once to move from this screen to the Load
Response Number screen.
Load Response Number
The load response number appears when the display contains two
decimal points. Initially, the display should read 000.8., the
factory-set value. Thirty-one load response numbers are available:
0 through 30. Most applications will run quite successfully at the
setting of 8.
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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. Repeat, if necessary, until the oscillation no longer is
present.
If the motor accelerates too slowly, or if it oscillates slowly
around its set speed, the DLC probably is responding too slowly
to the detected variance in speed. Its response will be improved
by your increasing the Load Response Number.
In handling highly inertial loads, it may be that no setting of the
Load Response Number satisfactorily resolves the hunting
problem. Should this be the case, the application may require a
regenerative-type speed controller instead, with the Digi-Lok®
Converter.
Change the Load Response Number by pressing the UP pushbutton to increase the displayed value, or the DOWN push-button
to decrease it. Each time the push-button is pressed, the value will
change by one unit. To accelerate this rate of change, simply hold
in the push-button continuously until you approach the desired
value. After releasing the push-button, you will be able to make
unit increments again.
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Programming Instructions
23
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. A value of 100
for the Display Scaling Factor appears in this display as 01.0.0.
It is important to understand how the DLC display operates. In
its operating mode, the DLC display shows the number of
feedback pulses counted during a fixed, programmable time
period-the gate time. Mathematically,
SPEED DISPLAY = FREQ X GT
[2]
Where GT = gate time (sec) and FREQ = feedback frequency
(Hz).
FREQ=(SHAFT RPM) x (PPR/60)
[3]
Thus, the DLC gate time may be calculated from the system
parameters. By combining equations [2] and [3] and solving for
gate time, we arrive at the following equation:
GT= [(SPEED DISPLAY / SHAFT RPM)] x (60 / PPR), sec [4]
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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
[5]
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. There is, however, one important
difference between the two scaling factors.
The numerical value of the speed scaling factor has no effect on
the intrinsic performance of the DLC. It only scales the
numerical entry to the desired motor speed. Any calculated value
from 1 to 9999 is totally acceptable as the speed scaling factor.
The display scaling factor, on the other hand, defines the gate
time for the DLC display (equation [5] ). There are practical
limitations on the range of acceptable gate times.
Gate times shorter than approximately 0.5 sec will yield blurred
numbers when the pulse count (speed) varies in consecutive
screen updates. To avoid an illegible display, set the gate time to
at least 0.5 sec.
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Programming Instructions
25
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. A DSF outside this
range can be changed to an acceptable one. You need only make
the appropriate change in any one or more of the variables
appearing in Equation 6.
If the calculated DSF value is too low, you can: display ten times
the speed and move the decimal point one place to the left;
monitor a slower rotating shaft, or select a feedback source
having fewer pulses per revolution.
If your calculated DSF value is too high, you can: reduce the
speed display by one or more orders of magnitude and move the
decimal point. You might change to larger units of measure, e.g.,
feet per minute instead of inches per minute. You could also
monitor a higher-speed shaft or use a feedback device having a
higher number of pulses per revolution.
Change the DSF value by pressing the UP push-button to
increase the displayed value, or the DOWN push-button to
decrease it. Each time the pushbutton is pressed, the value will
change by one unit. To accelerate this rate of change, simply hold
the pushbutton continuously until you approach the desired rate.
Release the pushbutton to revert to the slower incrementing rate.
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26
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
0.0.0.0
0.0.0.1
0.0.0.2
0.0.0.3
Decimal point display
1800
180.0
18.00
1.800
Use the UP and DOWN push-buttons to change the decimal point
location number. When you’ve done this, you can stay in the
Programming Mode to correct a previous programming error or
you can go to the operating mode. Press ENTER to stay in the
Programming Mode. The SSF programming screen will be seen.
When you are ready to leave the Programming Mode, press and
hold the ENTER button while you also press the UP push-button.
Try to release both push-buttons at the same time.
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27
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.
If, by chance, you release the ENTER push-button after the UP
push-button, the display may show you the set speed with the lefthand digit flashing. This means that you are in the speed-setting
mode. To get out of this mode, press ENTER until the right-hand
digit flashes, then press ENTER one more time.
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29
Troubleshooting
Warning
Dangerous voltages exist on the drive when it is powered.
When possible, disconnect the drive while troubleshooting.
High voltages can cause serious or fatal injury.
Before troubleshooting
Perform the following steps before starting any procedure in this
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.
• Verify that every connection is correct and in good condition.
• 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).
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Troubleshooting
Most problems, if they do occur, will appear at initial start-up of
the 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. The output from the DLC to the speed control may not be
wired correctly. Check the hookup carefully.
2. Check the continuity of all output leads, from the DLC to the
control and from the control to the motor.
3. The speed control may be defective. Disconnect the DLC from
the control. Connect the speed adjust potentiometer to the control.
Check whether the motor runs properly.
4. The motor may be defective. Test the system with another
motor.
If the motor will not lock into speed:
1. The load response number may be too low (if the oscillation is
gradual) or too high (if the oscillation is very rapid).
2. The speed control may be incorrectly calibrated. Check that the
accel, decel, and IR comp settings are at their minimums.
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Troubleshooting
31
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.
4. Confirm that the pickup sensing tip is directly over the center
of the gear teeth and is no farther than 0.010" above the teeth.
Extensive shaft runout is the most common cause of this type of
problem.
5. Check continuity and shielding of pickup leads. Electrical noise
can cause the DLC to attempt corrections that are not justified.
6. Rapid shifts in load may be pulling the motor out of its set
speed. Consider the use of a regenerative drive with the DLC.
7. The IR COMP (regulation) setting on the drive may be above
zero. Set IR COMP (regulation) to zero (full CCW).
If motor runs at top speed regardless of the set
speed:
1. There may be an electromechanical defect in the pickup, a
break in the pickup leads, or in the leads from any sensor. Also,
check the alignment of the pickup over the gear. Without accurate
feedback information fed to the DLC, the system cannot be
expected to operate correctly.
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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).
If the motor is running at a fixed difference below set
speed:
1. There may be a 60 Hz signal riding on the pickup leads. Check
that the leads are run in their own conduit and that all connections
are tightly made. For long paths, these leads must be shielded and
their shielding grounded at the DLC.
2. Check to be certain that if the speed control circuit does not
have a clamping resistor between its CCW and wiper terminals,
you have connected all three output terminals of the DLC to their
corresponding terminals on the speed control. If, on the other
hand, the speed control is already clamped, verify that the
connection to DLC terminal S1 is correctly left open.
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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.
This warranty shall not apply to any product that has been repaired by unauthorized persons.
The Corporation is not responsible for removal, installation, or any other incidental expenses
incurred in shipping the product to and from the repair point.
B. Disclaimer
The provisions of Paragraph A are the Corporation’s sole obligation and exclude all other
warranties of merchantability for use, express or implied. The Corporation further disclaims any
responsibility whatsoever to the customer or to any other person for injury to the person or
damage or loss of property of value caused by any product that has been subject to misuse,
negligence, or accident, or misapplied or modified by unauthorized persons or improperly
installed.
C. Limitations of Liability
In the event of any claim for breach of any of the Corporation’s obligations, whether express or
implied, and particularly of any other claim or breech of warranty contained in Paragraph A, or of
any other warranties, express or implied, or claim of liability that might, despite Paragraph B, be
decided against the Corporation by lawful authority, the Corporation shall under no
circumstances be liable for any consequential damages, losses, or expense arising in
connection with the use of, or inability to use, the Corporation’s product for any purpose
whatsoever.
An adjustment made under warranty does not void the warranty, nor does it imply an extension
of the original 12-month warranty period. Products serviced and/or parts replaced on a nocharge basis during the warranty period carry the unexpired portion of the original warranty only.
If for any reason any of the foregoing provisions shall be ineffective, the Corporation’s liability for
damages arising out of its manufacture or sale of equipment, or use thereof, whether such
liability is based on warranty, contract, negligence, strict liability in tort, or otherwise, shall not in
any event exceed the full purchase price of such equipment.
Any action against the Corporation based upon any liability or obligation arising hereunder or
under any law applicable to the sale of equipment or the use thereof, must be commenced
within one year after the cause of such action arises.
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Page 34
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
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