CENTENT CN0162 Manuel utilisateur

OPERATING MANUAL

CN0162 MICROSTEP DRIVE

3879 SOUTH MAIN STREET 714-979-6491

SANTAANA, CALIFORNIA 92707-5710 U.S.A.

0 M P A N Y

This manual contains information for installing and operating the

following Centent Company products:

•CN0162 Microstep Drive

Centent and the Centent Company logo are trademarks of

Centent Company. Other trademarks, tradenames, and service

marks owned or registered by any other company and used in

this manual are the property of their respective companies.

3879 South Main Street

Santa Ana, CA 97207

CONTENTS

INTRODUCTION

GENERAL DESCRIPTION................................................................... 3

LOCATION OF COMPONENTS.......................................................... 4

INSTALLATION

POWER SUPPLY................................................................................. 5

PHASE OUTPUTS ............................................................................... 7

MOTOR LEAD COLOR CODE TABLES .......................................... 10

STANDBY SET................................................................................... 12

DIRECTION ........................................................................................ 13

STEP PULSE...................................................................................... 13

+5 VDC................................................................................................ 14

CURRENT SET .................................................................................. 15

CURRENT SET TABLE...................................................................... 16

RESOLUTION SELECT ..................................................................... 17

RESOLUTION OPTIONS TABLE ...................................................... 18

MICROSTEP COMPENSATION (Offset Trimpot adjust)................... 19

FEATURES

MICROSTEPPING.............................................................................. 20

ANTI-RESONANCE............................................................................ 21

POWER-ON RESET........................................................................... 23

UNDER-VOLTAGE LOCKOUT.......................................................... 23

FAULT LED......................................................................................... 24

CHOPPING FREQUENCY................................................................. 25

CURRENT PROFILE OPTION........................................................... 25

PERFORMANCE

MICROSTEP ACCURACY................................................................. 27

MOTOR TOLERANCES...................................................... 27

MOTOR LINEARITY............................................................ 27

MOTOR LOAD..................................................................... 28

TORQUE AND POWER..................................................................... 28

MOTOR WINDING CONFIGURATION.............................................. 30

POWER SUPPLY VOLTAGE............................................................. 33

POWER SUPPLY CURRENT............................................................ 33

MOTOR AND DRIVE HEATING ........................................................ 34

SPECIFICATIONS............................................................................................. 36

2CENTENT CN0162 MICROSTEP DRIVE

POWER SUPPLY GND.

+24 TO 80 VOLTS DC

PHASE A

PHASE B

PHASE C

PHASE D

STANDBY SET

DIRECTION

STEP PULSE

+5 VOLTS DC

CURRENT SET

GROUND

(INTERNAL)

CENTENT CN0162

HIGH RESOLUTION

MICROSTEP DRIVE

123456789101112

180

SEE TABLE

3.625”

92.1mm

4.0”

101.6mm

4.5”

114.3mm

3.625”

92.1mm

0.85”

21.5mm

0.125”

3.2mm

3.25”

82.6mm

0.186”

4.7mm

0.20”

5.1mm

MICROSTEPS PER STEP

SEL.A:

SEL. B:

SEL. C:

SEL. D:

CURRENT SET

AMPS/ø RESISTOR

3.6K

7.5K

24K

33K

43K

56K

75K

110K

150K

240K

430K

1.6M

12K

18K

0.7”

17.8mm

Figure 1: CN0162 MICROSTEP DRIVE

INTRODUCTION 3

GENERAL DESCRIPTION

The CENTENT CN0162 is a high resolution step motor drive featuring four user

selectable microstep resolutions. The resolution is selected by an option header on the

front of the drive. Available step rates range from full-step to 256 microsteps. The

CN0162 driver is capable of delivering up to 1.5 million microsteps per second to the

step motor.

The CN0162 operates on an unregulated positive supply voltage of 12-80 VDC. Drive

output current ranges from .1 to 7 amps per phase. The CN0162 operates hybrid PM

step motors rated from .1 to 14 amps per phase. With suitably sized motors, over one-

third horsepower (300 watts) can be delivered to the user's application.

The control interface for the drive is opto-isolated for maximum noise immunity. The

inputs are compatible with TTL drivers and require no additional components.

Anti-resonance circuitry is employed in the CN0162 to provide mid-band stability. This

allows continuous, full power operation at speeds normally prohibited by mid-band

resonance. The pin-out of the driver is compatible with the CENTENT CN0142 and

CN0143 microstep drives.

The 'H' bridge output utilizes MOSFET design to minimize heating due to switching

losses. Automatic current standby reduces phase current to a low level while the motor

is at rest to keep heating of the drive and motor to a minimum. To improve motor

efficiency and high speed performance the CN0162 tracks the drive's chopping

frequency to the power supply voltage. This permits the use of motors with winding

inductance as low as 0.5 millihenry.

Over-current (winding shorts etc.), over-temperature (insufficient heat sinking), and

under-voltage are automatically sensed by the CN0162. When any of these conditions

occur the CN0162 shuts down and turns on a 'fault' LED to indicate the presence of the

fault condition.

The drive is compact; measuring 4" x 4.75" x .85". It comes encapsulated in a heat

conductive epoxy and encased in an anodized aluminum cover. The result is an

environmentally rugged package that resists abuse and contamination.

4CENTENT CN0162 MICROSTEP DRIVE

LOCATION OF COMPONENTS

The major components of the CN0162 are shown in Figure 2. The following is a

description of these components.

MOUNTING PLATE

Figure 2: Component Location

This plate also serves as a heatsink for the

drive. Primary heat generating

components are attached to this plate.

Secondary heat generators are thermally

coupled to it by the heat conductive

epoxy used to encapsulate the CN0162.

CONNECTOR

A 12 position terminal strip located on the

front edge of the CN0162 provides the

connections for power supply, motor

windings and controller interface. The

function of each contact is printed on the

case adjacent to the terminal strip.

OPTION HEADER

This 4 pin header is used to select microstep resolution. The user jumpers the

appropriate pins with the shorting bars supplied with the drive. Four resolutions are

available in each drive. There are a total of 21 possible resolutions for the CN0162.

FAULT LED

This LED indicates that the CN0162 has triggered its protective shutdown circuit.

Cycling the power supply after correcting the fault condition will reset the CN0162 and

turn off the LED.

OFFSET TRIMPOTS

These two adjustment pots allow the user to trim the CN0162 to a particular step motor.

This nulls out any residual step error and is especially effective at microstep resolutions

of 16 or above.

INSTALLATION 5

INSTALLATION

When operating the CN0162 at high power levels an external heatsink must be attached

to the mounting plate. Optional heatsink kits in various configurations are available

from Centent Company.

No terminals or connectors are required on the wiring to the drive. A wire size of 16-22

gauge is recommended. Either stranded or solid conductor wire may be used. The

insulation should be stripped back .25 inches and the wire left untinned. The following

section describes each connector terminal in detail.

POWER SUPPLY TERMINAL 1 & 2

Terminal 1 is the ground connection. Terminal 2 connects to the positive output from

the power supply. The power supply voltage range is +12 to +80 VDC. The power

supply may be unregulated. For unregulated supplies it is recommended that the ripple

voltage be limited to a maximum of 10% of the DC output voltage.

The power supply terminals should have a capacitor of at least 470 µfconnected

across them. This is particularly important for regulated power supplies since they

usually have little output capacitance. This capacitor should be located as close to

Terminals 1 & 2 as possible (see Figure 3, C2).

123

+VDC D

1-4

115 VAC

Figure 3: Power Supply

6 CENTENT CN0162 MICROSTEP DRIVE

For those users that wish to build their own power supply, Figure 3 shows a suggested

circuit. Because of the electrical noise generated by these drives, it is not recommended

that the supply be shared with low level logic circuitry.

During rapid deceleration of large inertial loads from high speeds, step motors become

generators of considerable electrical power. This is returned to the supply by the step

motor drive. If the supply cannot absorb this power, the voltage generated may exceed

the 80 volt limit of the CN0162 and damage the drive and power supply.

To prevent this problem a zener diode should be connected from Terminal 2 to ground

(Figure 3, D5). This diode protects the drive from any over-voltage condition.

Recommended diodes are 1N4762 (1 watt) or 1N5375 (5 watt). Note the 5 AMP fuse

(F1) placed in series with Terminal 2 and the power supply. Be sure this fuse is located

between the power supply and the zener diode. In the event of an over-voltage condition

the zener diode and fuse may be destroyed, but the CN0162 and power supply will be

protected from damage.

Power supply current requirements depend on the motor being used and whether it is

wired for high performance (parallel) or low performance (series) operation. See

MOTOR WINDING CONFIGURATION (page 30) in the PERFORMANCE section of

this manual for a complete explanation of motor wiring options.

If the motor is wired for high performance (parallel) the current required from the

supply will not exceed 2 ⁄3 of the motor's rated per phase current. Low performance

(series) operation requires a maximum of 1 ⁄3 the motor's rated current. Use the

manufacturer's phase current rating of the motor in conjunction with the motor wiring

option to estimate the size of power supply required. As an example, a 6 wire motor

rated at 4 amps per phase is used with the power supply circuit (in Figure 3) and the

motor is in the full winding (series) configuration. To calculate the current required

from the power supply:

Amps1.33=4x

ISUPPLY

INSTALLATION 7

In this example, assume a transformer with a 25 volt RMS secondary will be used. After

rectification this will produce a 37 VDC power supply voltage. To calculate the size of

the filter capacitor (Figure 3, C1) use the following equation:

F3000F2995=

37 .33)(83,333)(1

)

(83,333)(

CSUPPLY

SUPPLY

μμ

≈

C2(in Figure 3) is the 470 µf capacitor that should be located close to the CN0162

power supply terminals. C1may be made smaller by that amount if desired. Both

capacitors must have a voltage rating safely in excess of the power supply voltage; 50

VDC being a good choice for this example.

More than one CN0162 can be run from a common power supply if the filter capacitor

is sized large enough to account for the combined load. Each CN0162 must have

separate power supply leads back to the power supply.

PHASE OUTPUTS TERMINALS 3 - 6

These are the phase winding outputs to the step motor. One motor winding goes to

PHASE A-B and the other motor winding connects to PHASE C-D. No power is

applied to the Phase outputs until reception of the initial step pulse after power-up of the

CN0162 (see page 23 - Power-On Reset).

The CN0162 will drive 4, 6 and 8 wire motors. With 6 wire and 8 wire motors, the user

has the option of connecting the windings in a high or low performance configuration.

References in this manual to full or half-winding configurations (6 wire motors) infers

series or parallel configurations (8 wire motors) as well. A 4 wire motor is considered to

be wired in the high performance configuration. See MOTOR WINDING

CONFIGURATION (page 30) in the PERFORMANCE section of this manual to

determine the best configuration for your application.

8 CENTENT CN0162 MICROSTEP DRIVE

PHASE A

PHASE B

n.c.

PHASE C

PHASE D

n.c.

The high performance configuration in

a 6 wire motor is called half winding

or parallel operation. Half winding

operation uses the center-tap wire and

one end wire to constitute a winding

(Figure 4). The other end wire of each

winding is not used. In a 8 wire motor

the windings are connected as pairs of

parallel wired windings.

Figure 4: Half Winding

PHASE A

PHASE B

PHASE C

PHASE D

n.c.

The low performance configuration in a

6 wire motor is called full winding or

series operation. Only the end wires of

each phase constitutes a winding

(Figure 5). The center-taps are left

unused. In a 8 wire motor the windings

are connected as pairs of series wired

windings.

Figure 5: Full Winding

Table I & Table II (Page 10) show various manufacturer's 6 wire motor lead color codes

and how they connect to the CN0162 for full winding and half winding operation. Table

III & Table IV (Page 11) show various manufacturer's 8 wire motor lead color codes

and how they connect to the CN0162 for series and parallel wired operation. Note that

the wires in parentheses are connected to each other and not to a terminal on the

CN0162. Wires not connected to the CN0162 should not be left exposed. Cut off the

stripped ends and insulate them with electrical tape or heat-shrink tubing.

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