Minarik Drives MM501U Users Manual

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MM501U

User’s Manual

SCR, Dual-Voltage, Adjustable Speed

Drive for DC Brush Motors

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.

MVD091302

Printed in the United States of America.

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.

SHOCKAVOID

OID

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 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.



Specifications 1

Dimensions 2

Installation 3

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Cage-clamp Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

Speed adjust potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Shielding guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Power, fuse and motor connections . . . . . . . . . . . . . . . . . . . . . . .8

Power input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Field Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Start/Stop Pushbuttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Tachogenerator Feedback . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Voltage Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Current Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

Operation 14

Before applying power: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14

Startup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Diagnostic LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

Line starting and line stopping . . . . . . . . . . . . . . . . . . . . . . . . . .17

Start/Stop Pushbuttons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Dynamic Braking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17

Calibration 20

Maximum Speed (MAX SPD) . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Minimum Speed (MIN SPD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

iii

Table 1. Field Ouptut Connections . . . . . . . . . . . . . . . . . . . . . . . . . .11

Table 2. Recommended Dynamic Brake Resistor Sizes . . . . . . . . . .18

Table 3. Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Tables

Current Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

IR Compensation (IR COMP) . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

Acceleration (ACCEL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Deceleration (DECEL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

TACH VOLTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27

Application Notes 30

Multiple Fixed Speeds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Adjustable speeds using potentiometers in series . . . . . . . . . . . . .31

Independent adjustable speeds . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Reversing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Reversing with a DLC600 controller . . . . . . . . . . . . . . . . . . . . . . .34

Troubleshooting 35

Before troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Replacement Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Unconditional Warranty 41inside back cover

Figure 1. MM501U Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Figure 2. Cage-Clamp Terminal Block . . . . . . . . . . . . . . . . . . . . . . . . .5

Figure 3. Speed Adjust Potentiometer . . . . . . . . . . . . . . . . . . . . . . . . .6

Figure 4. MM501U Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Figure 5. Voltage or Current Signal Connections . . . . . . . . . . . . . . . .13

Figure 6. Diagnostic LED Locations . . . . . . . . . . . . . . . . . . . . . . . . . .16

Figure 7. Dynamic Brake Connection . . . . . . . . . . . . . . . . . . . . . . . .19

Figure 8. Calibration Trimpot Layout . . . . . . . . . . . . . . . . . . . . . . . . .21

Figure 9. CURRENT LIMIT and IR COMP Settings . . . . . . . . . . . . . .25

Figure 10. Feedback Switch (SW503) Location . . . . . . . . . . . . . . . . .28

Figure 11. Tachogenerator Connections . . . . . . . . . . . . . . . . . . . . . .29

Figure 12. Multiple Fixed Speeds . . . . . . . . . . . . . . . . . . . . . . . . . . .30

Figure 13. Adjustable Speeds Using Potentiometers in Series . . . . . .31

Figure 14. Independent Adjustable Speeds . . . . . . . . . . . . . . . . . . . .32

Figure 15. Reversing Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Figure 16. Independent Forward and Reverse Speeds . . . . . . . . . . . .34

Illustrations

Specifications

Model Number MM501U

Type Open Chassis

Line Fuse Rating 40A (Buss Type SC-40 or equivalent)

Field Fuse Rating 3A, fast-acting

Horsepower Range @ 90 VDC Output 1 - 2.5 HP

Horsepower Range @ 180 VDC Output 2 - 5 HP

Maximum Armature Voltage Range @ 115 VAC Input 0 - 90 VDC

Maximum Armature Voltage Range @ 230 VAC Input 0 - 180 VDC

Minimum Speed Adjustment Range @ 115 VAC Input 0 - 60 VDC

Minimum Speed Adjustment Range @ 230 VAC Input 0 - 120 VDC

Maximum Armature Current 25 ADC

Field Voltage @ 115 VAC Input 50 VDC (F1 to L1) or 100 VDC (F1 to F2)

Field Voltage @ 230 VAC Input 100 VDC (F1 to L1) or 200 VDC (F1 to F2)

Form Factor 1.37

Acceleration Time Range (no load)

0 - 90 VDC Armature Voltage 0.5 - 12 seconds

0 - 180 VDC Armature Voltage 0.5 - 12 seconds

Deceleration Time Range (no load)

0 - 90 VDC Armature Voltage 0.5 - 12 seconds

0 - 180 VDC Armature Voltage 0.5 - 12 seconds

Analog Input Voltage Range

(grounded and isolated signal; S1 to S2) 0 - 10 VDC

Speed Adjustment Potentiometer 10Kohm

Approximate Input Impedance

(S1 to S2; voltage signal setting) 100K ohm

Speed Regulation (% of base speed)

Armature Feedback 1% or better

Tachogenerator Feedback 0.1%

Tachogenerator Feedback Voltage Range 7 - 50 VDC per 1000 RPM

Weight 3.8 lb

Ambient Operating Temperature Range * see notes

Notes: * 10º - 40ºC when mounted flat (horizontally), or in an enclosure whose volume is between 4 and 6 cubic feet;

10ºC - 50ºC when mounted upright (with heatsink fins vertical) in an enclosure greater than 6 cubic feet.

ALL DIMENSIONS IN INCHES [MILLIMETERS]

FOUR (4) MOUNTING SLOTS 0.19 [5] X 0.30 [8] DEEP

Dimensions

]

AC1

AC2

T501

D503

SCR

S2 S1 1

S3 2

MAX MIN 02

03 P

D C L

RUN

R501

R504

R50

D504

O T

COM

Figure 1. MM501U Dimensions

R50

9.80 [249

.00 [178

TB5

507

IL5

E E

6.30 [160

6.90 [175

2.50 [66

• Drive components are sensitive to electrostatic fields. Avoid

direct contact with the circuit board. Hold drive by the chassis

only.

• Protect the drive from dirt, moisture, and accidental contact.

• Provide sufficient room for access to the terminal block and

calibration trimpots.

• Mount the drive away from heat sources. 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 vertical plane

(vertical mounting is preferred; see Figure 1, page 2). Four 0.19

in. (5 mm) wide slots in the chassis accept #8 pan head screws.

Fasten either the large base or the narrow flange of the chassis

to the subplate.

• The chassis must be earth grounded. Use a star washer beneath

the head of at least one of the mounting screws to penetrate the

anodized chassis surface and to reach bare metal.

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 on page i before attempting installation.



Mounting

Installation

4 Installation

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 drive unless power is removed and the drive is disabled. Opening any one motor lead may destroy the drive.





Wiring

• Use 18 AWG wire for speed adjust potentiometer wiring. Use 16

AWG wire for field (F1, F2) wiring. Use 14 AWG wire for AC line

(L1, L2) and motor (A1, A2) wiring.

Fuses

MM501U drives have two 40A line fuses installed in Fuse Holder

501 (FH501). Line fuses are rated for maximum rated horsepower.

Resize line fuses if using a smaller horsepower motor. Size fuses

for approximately 150% of the maximum motor armature current.

One 3A field fuse (FU503) is also installed on the drive. This fuse

does not have to be resized if using a smaller horsepower motor.

5Installation

Figure 2. Cage-Clamp Terminal Block

Cage-clamp Terminal Block

MM501U drives use a cage-clamp terminal block for terminal

block 502 (TB502). To connect a wire to the cage-clamp terminal

block (see Figure 2), use a small screwdriver to press down on

the lever arm. Insert a wire stripped approximately 0.25 inches (6

mm) into the opening in front of the terminal block. Release the

lever arm to clamp the wire.

Press down on the lever arm using a small screwdriver.

Insert wire into the

wire clamp.

Release the lever arm

to clamp the wire.

6 Installation

Mount the speed adjust potentiometer through a 0.38 in. (10 mm)

hole with the hardware provided (Figure 3). Install the circular

insulating disk between the panel and the 10K ohm speed adjust

potentiometer.

Twist the speed adjust potentiometer wire to avoid picking up

unwanted electrical noise. If speed adjust potentiometer wires are

longer than 18 in. (457 mm), use shielded cable. Keep speed

adjust potentiometer wires separate from power leads.

JUST

Figure 3. Speed Adjust Potentiometer

Speed adjust potentiometer

Warning

Be sure that the potentiometer tabs do not make contact with the potentiometer enclosure. Grounding the input will cause damage to the drive.



UNT THROUGH A 0.38 IN. (10 MM) HOL

TAR

HER

NSULATING DISK

PEED AD

POTENTIOMETER

7Installation

Shielding guidelines

As a general rule, Minarik recommends shielding of all conductors.

If it is not practical to shield power conductors, Minarik

recommends shielding all logic-level leads. If shielding logic leads

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.

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.



Power, fuse and motor connections

Connect the power input leads, an external line fuse and a DC

motor to the drive’s printed circuit board (PCB) as shown in Figure

4, page 10.

Warning

Do not connect this equipment with power applied.

Failure to heed this directive may result in fire or serious injury.

Minarik strongly recommends the installation of a master power switch in the voltage input line, as shown in Figure 4, page 10. The switch contacts should be rated at a

minimum of 200% of motor nameplate current and 250 volts.



Installation

Connections

9Installation

Power input

Connect the AC line power leads to terminals L1 and L2, or to a

double-throw, single-pole master power switch (recommended).

Motor

Minarik drives supply motor voltage from A1 and A2 terminals. It 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

opposite of the desired rotation, simply reverse the wiring of A1

and A2 with each other.

Connect a DC motor armature to PCB terminals A1 and A2 as

shown in Figure 4, page 10. Ensure that the motor voltage

rating is consistent with the drive’s output voltage.

Installation

C507

C506

503 505

506

ACC

)

JUST

)

Figure 4. MM501U Connections

WER

TACHOGENERAT

OPTIONAL

NEG (-

EL E

10KOH

PEED AD

POTENTIOMETE

TAR N.O.

N.C.

POS (+

IGNA

NNECTION

POS (+

FIELD OUTP

HUNT WOUN

MOTORS ONL

MOT

NEG (-

POWE

NNECTION

EMERGEN

TOP SWIT

115/230 VA

INPUT VOLTA

Field Output

The field output is for shunt wound motors only. DO NOT make

any connections to the field output when using a permanent

magnet motor. Table 1 lists the field output connections.

Table 1. Field Ouptut Connections

Line Voltage Approximate Field Field

(VAC) Voltage (VDC) Connections

115 50 F1 and L1

115 100 F1 and F2 230 100 F1 and L1 230 200 F1 and F2

Use 18 AWG wire to connect the field output to a shunt wound motor.

Start/Stop Pushbuttons

The drive can be operated with Start/Stop pushbuttons to start and

stop the motor (pushbuttons are not included with the drive). See

Figure 4 (page 10) for connections. Connect a momentary

operated, normally closed STOP pushbutton to B2 and B3.

Connect a momentary operated, normally open START pushbutton

to B2 and B3. If the Start/Stop pushbuttons are not used, jumper

terminal B1 and B3. As an added safety feature, the Start/Stop

pushbutton terminals (B1, B2, and B3) are isolated from earth

ground.

11Installation

Tachogenerator Feedback

Using tachogenerator feedback will improve speed regulation from

approximately 1% of motor base speed to approximately 0.1% of

motor base speed. Use tachogenerators rated from 7 VDC per

1000 RPM to 50 VDC per 1000 RPM. Connect the tachogenerator

to terminals T1 (-) and T2 (+) of terminal block 502 (TB502). See

Figure 4 (page 10) for tachogenerator feedback connections.

Voltage Signal

Instead of using a speed adjust potentiometer, the drive may be

wired to follow a grounded or ungrounded 0 - 10 VDC signal.

Connect the signal input (+) to S2 and the signal common (-) to S1

(see Figure 5, page 13). Make no connections to S3. NOTE: Set

SW505 to VOLTAGE SIGNAL if the drive is following a voltage

signal.

Current Signal

The MM501U can follow a 4 - 20 mA current signal. Connections

are the same as the voltage follower. Connect the signal input to

S1 and S2 (see Figure 5, page 13). Make no connections to S3.

NOTE: Set SW503 to CURRENT SIGNAL when the drive is follow

a current signal.

12 Installation

13Installation

C507

C506

C505

502

501

50 G

505

506

ACCEL

Figure 5. Voltage or Current Signal Connections

NAL

LTA

C502

C501

NAL

RRENT

4 - 20 mA CURRENT SIGNA

- 10 VDC VOLTAGE SIGNA

Warning

Dangerous voltages exist on the drive when it is powered. BE ALERT. High voltages can cause serious or fatal injury. For your safety, use personal protective equipment (PPE) when operating this drive.

To avoid drive or motor damage, change switch settings only when the drive is disconnected from the AC line voltage. Make sure all switches are set to their correct position.



Before applying power

• Verify that no conductive material is present on the printed circuit

board.

• Set SW501 and SW502 to either 115 or 230 to match the AC line

voltage.

• Set SW503 to either TACH for tachogenerator feedback or ARM

for armature feedback.

• Set SW504 to either 90 or 180 to match the motor armature

voltage.

• Set SW505 to either CURRENT SIGNAL or VOLTAGE SIGNAL to

match the input signal being used. If a speed adjust

potentiometer is being used, set the switch to VOLTAGE SIGNAL.

Operation

15Operation

Startup

1. Turn the speed adjust potentiometer full counterclockwise

(CCW). If the drive is following a voltage signal, set the voltage

signal to 0 VDC. If the drive is following a current signal, set the

current signal to minimum.

2. Apply AC line voltage.

3. Slowly advance the speed adjust potentiometer clockwise (CW).

If a voltage or current signal is used, slowly increase the voltage

or current signal. The motor slowly accelerates as the

potentiometer is turned CW, or the voltage or current signal is

increased. Continue until the desired speed is reached.

4. Remove AC line voltage from the drive to coast the motor to a

stop.

502

501

50 50

503

C 501

504

505

504

505

Figure 6. Diagnostic LED Locations

Operation

Diagnostic LEDs

The MM501U is equipped with the following diagnostic LEDs:

• POWER: Lights whenever AC line voltage is applied to the drive.

• CURRENT LIMIT (CL): Lights whenever the drive reaches

current limit.

• RUN: Lights whenever the motor is rotating.

IAGNOSTI

LED

EL E

WER

NAL

RRENT

17Operation

Line starting and line stopping

Line starting and line stopping (applying and removing AC line

voltage) is recommended for infrequent starting and stopping of a

drive only. When AC line voltage is applied to the drive, the motor

accelerates to the speed set by the speed adjust potentiometer.

When AC line voltage is removed, the motor coasts to a stop.

Start/Stop Pushbuttons.

Start/Stop pushbuttons allow you to accelerate the motor to set

speed, and to decelerate the motor to a stop. See Figure 4, page

10 for connection information.

Dynamic Braking

Dynamic braking may be used to rapidly stop a motor (Figure 7,

page 19). For the RUN/BRAKE switch, use a three-pole, double-

throw switch rated for at least the maximum DC armature voltage

and maximum braking current.

Size the dynamic braking resistor according to the motor current

rating (Table 2, page 18). The dynamic brake resistance listed in

the table is the smallest recommended resistance allowed to

prevent possible demagnetization of the motor. The motor stops

less rapidly with higher brake resistor values.

Operation

Table 2. Recommended Dynamic Brake Resistor Sizes

Motor Armature Minimum Dynamic Minimum Dynamic

Current Rating Brake Resistor Brake Resistor

(ADC) Value (Ohms) Power (Watts)

Less than 2 1 1

2 - 3 5 5 3 - 5 10 10

5 - 10 20 20 10 - 17 40 50 17 - 30 100 200

For motors rated 1/17 horsepower and less, a dynamic brake resistor

is not necessary since the armature resistance is high enough to stop

the motor without demagnetization. Replace the dynamic brake

resistor with 12 gauge wire.

19Operation

MM501U

Figure 7. Dynamic Brake Connection

A1 A2 B1

DYNAMIC BRAKE

RESISTOR

BRAKERUN

MOTOR

The MM501U is factory calibrated with a 2 HP, 180 VDC motor.

Re-adjust the calibration trimpot settings to accommodate motors

with different ratings.

All adjustments increase with CW rotation, and decrease with CCW

rotation. Use a non-metallic screwdriver for calibration. Each

trimpot is identified on the printed circuit board. See Figure 8,

page 21 for trimmer pot locations on the PCB.

Calibration

Warning

Dangerous voltages exist on the drive when it is powered. When possible, disconnect the voltage input from the drive before adjusting the trimpots. If the trimpots must be adjusted with power applied, use insulated tools and the appropriate personal protection equipment. BE ALERT. High voltages can cause serious or fatal injury.



21Calibration

Figure 8. Calibration Trimpot Layout

S2S1S3

502

C501

C502

501

503

SIGNAL

05 SIGNAL

CLRUN

501 04

D 04

503

504

507

SCR505

CURRENT LIMIT

IR COMP

TACH VOLTS

ACCELERATION

DECELERATION

POWE

K501

RREN

ACCELECE

VOLTA

Maximum Speed (MAX SPD)

The MAX SPD trimpot setting determines the maximum

speed. It is factory set for maximum rated motor speed.

To calibrate MAX SPD:

1. Set the MAX SPD trimpot full CCW.

2. Turn the speed adjust potentiometer full CW.

3. Adjust the MAX SPD trimpot CW until the desired maximum

motor speed is reached.

Minimum Speed (MIN SPD)

The MIN SPD setting determines the motor speed when the speed

adjust potentiometer is turned full CCW. It is factory set to zero

speed.

To calibrate MIN SPD:

1. Set the MIN SPD trimpot full CCW.

2. Turn the speed adjust potentiometer full CCW.

3. Adjust the MIN SPD trimpot CW until the desired maximum

motor speed is reached.

22 Calibration

Current Limit

Calibration

Warning

TORQUE should be set to 120% of motor nameplate current rating. Continuous operation beyond this rating may damage the motor. If you intend to operate beyond the rating, contact your Minarik representative for assistance.



The CURRENT LIMIT setting determines the maximum armature

output of the drive. It is factory set at 120% of rated motor current.

Re-calibrate the CURRENT LIMIT when using a lower current rated

motor. See Figure 9, page 25 for approximate trimpot settings or

re-calibrate using the following procedures:

1. With the power disconnected from the drive, connect a DC

ammeter in series with the armature.

2. Set the TORQUE trimpot to minimum (full CCW).

3. Set the speed adjust potentiometer to maximum speed (full CW).

4. Carefully lock the motor armature. Be sure that the motor is

firmly mounted.

5. Apply line power. The motor should be stopped.

6. Slowly adjust the TORQUE trimpot CW until the armature

current is 120% of motor rated armature current.

7. Turn the speed adjust potentiometer CCW until the motor stops.

8. Remove line power.

9. Remove the stall from the motor.

10. Remove the ammeter in series with the motor armature if it is

no longer needed.

IR Compensation (IR COMP)

The IR COMP trimpot setting determines the degree to which

motor speed is held constant as the motor load changes. It is

factory set for optimum motor regulation.

Refer to Figure 9 on page 25 for recommended settings or use the

following procedure to recalibrate the IR COMP setting:

1. Set the IR COMP trimpot to minimum (full CCW).

2. Rotate the speed adjust potentiometer until the motor runs at

midspeed without load (for example, 900 RPM for an 1800 RPM

motor). A hand held tachometer may be used to measure

motor speed.

3. Load the motor armature to its full load armature current rating.

The motor should slow down.

4. While keeping the load on the motor, rotate the IR COMP

trimpot CW until the motor runs at the speed measured in step

2. If the motor oscillates (overcompensation), the IR COMP

trimpot may be set too high (CW). Turn the IR COMP trimpot

CCW to stabilize the motor.

5. Unload the motor.

Calibration

25Calibration

Figure 9. CURRENT LIMIT and IR COMP Settings

800

1 1750 RP 24 AMP

H 180 VD 1750 RP

13.7 APM

2 180 VD 1750 RP

.2 AMP

1 1/2 H 180 VD 1

AMP

10 AMP

26 Calibration

Acceleration (ACCEL)

The ACCEL setting determines the time the motor takes to ramp to

a higher speed. See Specifications on page 1 for approximate

acceleration times. The ACCEL setting is factory set to its

minimum value (full CCW).

Turn the ACCEL trimpot CW to increase the acceleration time, and

CCW to decrease the acceleration time.

Deceleration (DECEL)

The DECEL setting determines the time the motor takes to ramp to

a lower speed. See Specifications on page 1 for approximate

deceleration times. The DECEL setting is factory set to its

minimum value (full CCW).

Turn the DECEL trimpot CW to increase the deceleration time, and

CCW to decrease the deceleration time.

27Calibration

TACH VOLTS

Warning

Calibrate the TACH VOLTS setting only when a tachogenerator is used.



The TACH VOLTS setting, like the IR COMP setting, determines

the degree to which motor speed is held constant as the motor

load changes. To calibrate the TACH VOLTS trimpot:

1. Connect the tachogenerator to T1 and T2. The polarity is

positive (+) for T1 and negative (-) for T2 when the motor is

running in the forward direction.

2. Set switch 503 (SW503) to ARM for armature feedback.

3. Set the speed adjust potentiometer full CW. Measure the

armature voltage across A1 and A2 using a voltmeter.

4. Set the speed adjust potentiometer to 0 (zero speed).

5. Set SW503 to TACH for tachogenerator feedback.

6. Set the IR COMP trimpot to full CCW.

7. Set the TACH VOLTS trimpot to full CW.

8. Set the speed adjust potentiometer to full CW.

9. Adjust the TACH VOLTS trimpot until the armature voltage is

the same value as the voltage measured in step 3.

Check that the TACH VOLTS is properly calibrated. The motor

should run at the same set speed when SW503 is set to either

armature or tachogenerator feedback.

28 Calibration

C507

C506

502

501

G 5

C 501

505

504

505

COM

Figure 10. Feedback Switch (SW503) Location

SW503

FEEDBACK

SWITCH

EL E

R504

WER

NAL

RRENT

29Calibration

Figure 11. Tachogenerator Connections

C507

C506

502

501

COM

TACH-GENERATOR

(optional)

NEG (-)

EL E

RRENT

NAL I

POS (+)

Application Notes

Multiple Fixed Speeds

Replace the speed adjust potentiometer with series resistors with a

total series resistance of 10K ohms (Figure 12). Add a single-pole,

multi-position switch with the correct number of positions for the

desired number of fixed speeds.

Figure 12. Multiple Fixed Speeds

TAL SERIE

RESISTAN

K OHM

31Application Notes

Adjustable speeds using potentiometers in series

Replace the speed adjust potentiometer with a single-pole, multi-

position switch, and two or more potentiometers in series, with a

total series resistance of 10K ohms. Figure 13 shows a connection

for fixed high and low speed adjust potentiometers.

Figure 13. Adjustable Speeds Using Potentiometers in Series

PEE

LOW

PEE

Application Notes

Independent adjustable speeds

Replace the speed adjust potentiometer with a single-pole, multi-

position switch, and two or more potentiometers in parallel

resistance of 10K ohms. Figure 14 shows the connection of two

independent speed adjust potentiometers that can be mounted at

two separate operating stations.

Figure 14. Independent Adjustable Speeds

PEED

PEED 1

Reversing

To reverse motor direction, use a dynamic brake and a three-pole,

three-position switch rated for at least the maximum DC armature

voltage and maximum braking current. See Figure 15 for

connections. Wait for the motor to stop completely before

switching it to either the forward or reverse direction. See the

Dynamic Braking section on page 17 for sizing the dynamic brake

resistor.

Figure 15. Reversing Circuit

Application Notes

MM501U

A1 A2 B1

DYNAMIC BRAKE

RESISTOR

MOTOR

FWD

BRAKE

REV

Application Notes

ake

code

Signal

S1S2

C600

hibi

Reversing with a DLC600 controller

A DLC600 controller, can be used in a reversing application. The

DLC600 must be inhibited while braking. Without the inhibit

feature, the DLC600 will continue to regulate. This will cause

overshoot when the DLC600 is switched back to the drive.

Figure 16 show the connection of the reversing circuit to an

MM501U drive and a DLC600. Note: Only one DLC option

(Optical Encoder or Magnetic Pickup) may be used simultaneously.

Figure 16. Independent Forward and Reverse Speeds

namic r

tor

ptica

agnetic

ckup

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.

Troubleshooting



Before troubleshooting

Perform the following steps before starting any procedure in this

section:

1. Disconnect AC line voltage from the drive.

2. Check the drive closely for damaged components.

3. Check that no wire chips or other foreign material has become

lodged on the printed circuit board.

4. Verify that every connection is correct and in good condition.

5. Verify that there are no short circuits or grounded connections.

6. Check that the voltage selection switch settings match the AC

line voltage.

For additional assistance, contact your local Minarik distributor, or

the factory direct: 1-800-MINARIK (646-2745) or

Fax: 1-800-394-6334

Troubleshooting

Line fuse blows. 1. Line fuse is the

wrong size.

2. Motor cable or armature is shorted to ground.

3. Nuisance tripping caused by a combination of ambient conditions and high-current spikes (i.e. reversing).

1. Check that the line fuse is correct for the motor size.

2. Check motor cable and armature for shorts.

3. Add a blower to cool the drive components; decrease CURRENT LIMIT setting, or resize motor and drive for actual load demand. Check for incorrectly aligned mechanical components or “jams”.

Problem Possible

Causes

Replacement Parts

Replacement parts are available form Minarik Corporation and its

distributors for this drive series.

Table 3. Replacement Parts

Model No. Symbol Description Minarik P/N

MM501U D501,502 3A, 800V Diode 071-0003

D503,504 1.5A, 600V PIV Diode 071-0012 IC505 IS0122P IC 060-0106 IC506 4N35 Opto-Coupler 060-0101 R501 .002 OHM, 13W Resistor 032-0133 SCR501-505 800V, 65A SCR 072-0059 T501 3FD-436 Transformer 230-0072 FU501,502 40A Fuse 050-0060 FU503 3A, Fast-Acting Fuse 050-0021

Heat Sink 223-0294 10 Kohm Potentiometer Kit 202-0003

39Troubleshooting

NOTES

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 or 3,000 hours, whichever comes first, from date of manufacture thereof. Within this warranty period, the Corporation will repair or replace, at its sole discretion, such products that are returned to Minarik Corporation, 901 East Thompson Avenue, Glendale, CA 912012011 USA.

This warranty applies only to standard catalog products, and does not apply to specials. Any returns for special controls will be evaluated on a case-by-case basis. 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 no-charge 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.

901 E Thompson Avenue

Glendale, CA 91201-2011

Tel.: 1-800-MINARIK (646-2745)

Fax: 1-800-394-6334

www.minarikcorp.com

Document number 250-0215, Revision 2

Printed in the U.S.A – September 2002

Minarik Drives MM501U Users Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Safety Warnings

Contents

Tables

Illustrations

Specifications

Dimensions

Mounting

Installation

Wiring

Fuses

Cage-clamp Terminal Block

Speed adjust potentiometer

Shielding guidelines

Power, fuse and motor connections

Connections

Power input

Motor

Field Output

Start/Stop Pushbuttons

Tachogenerator Feedback

Voltage Signal

Current Signal

Before applying power

Operation

Startup

Diagnostic LEDs

Line starting and line stopping

Start/Stop Pushbuttons.

Dynamic Braking

Calibration

Maximum Speed (MAX SPD)

Minimum Speed (MIN SPD)

Current Limit

IR Compensation (IR COMP)

Acceleration (ACCEL)

Deceleration (DECEL)

TACH VOLTS

Application Notes

Multiple Fixed Speeds

Independent adjustable speeds

Reversing

Reversing with a DLC600 controller

Troubleshooting

Before troubleshooting

Replacement Parts

NOTES

Unconditional Warranty