background image

Supply

R

Supply

R

Supply

R

Voltage

Ohms

Voltage

Ohms

Voltage

Ohms

12

1200

21

3000

30

4700

15

1800

24

3600

33

5100

18

2400

27

4200

35

5600

Table I:  External Dropping Resistors

R

R

3540 M

drive

STEP  +5  DIR  EN

R

-7-

-10-

INPUT SIGNALS

+V (12-42 volts DC)

STEP

DIR

EN

Note:  DIR signal is only required for bidirectional motion.
EN signal is only required to shut off motor current.
Both inputs can be left open if not needed.

Microstepping

Most step motor drives offer a choice between full step and half step resolutions.  In 
most full step drives, both motor phases are used all the time.  Half stepping divides 
each step into two smaller steps by alternating between both phases on and one 
phase on.  Microstepping drives like the 3540 M precisely control the amount of 
current in each phase at each step position as a means of electronically subdividing 
the steps even further.  The 3540 M offers a choice of half step and 3 microstep 
resolutions.  The highest setting divides each full step into 64 microsteps, providing 
12,800 steps per revolution when using a 1.8˚ motor.  

In addition to providing precise positioning and smooth motion, microstep drives 
can be used to provide motion in convenient units.  When the drive is set  to 2000 
steps/rev (1/10 step) and used with a 5 pitch lead screw, you get .0001 inches/step.

Setting the step resolution is easy.  Look at the dip switch on the 3540 M.  Next to 
switches 2 and 3, there are labels on the printed circuit board.  Each switch has two 
markings on each end.  Switch 2 is marked 1/5, 1/10 at one end and 1/5, 1/64 at 
the other.  Switch 3 is labeled 1/2, 1/5 and 1/10, 1/64.  To set the drive for a 
resolution, push both switches toward the proper label.  For example, if you want 
1/10 step, push switch 2 toward the 1/10 label (to the left) and push switch 3 toward 
1/10 (on the right).

Please refer to the table below and set the switches for the resolution you want.

400

STEPS/REV

(HALF)

1000

STEPS/REV

(1/5)

2000

STEPS/REV

(1/10)

12800

STEPS/REV

(1/64)

23

1/2

1/10

1/5
1/2

23

1/2

1/10

1/5
1/2

1/5
1/64
1/10
1/64

1/5
1/64
1/10
1/64

23

1/2

1/10

1/5
1/2

23

1/2

1/10

1/5
1/2

1/5
1/64
1/10
1/64

1/5
1/64
1/10
1/64

We have included the proper resistor (680 ohms) within the drive for 5 volt 
operation.  Therefore, if your logic voltage is 5 volts, you do not need to add 
resistors externally.  

If your logic voltage is higher than five volts, you must add a resistor in series with 
each signal that you use (STEP, DIR and EN).  The recommended wiring diagram is 
shown below.  Table I lists the appropriate resistor value to use for a given power 
supply voltage.  1/4 watt or larger resistors should be used.

Please take care not to reverse the wiring, as damage to the LEDs will 
result rendering the drives inoperable.  Check your wiring carefully 
before turning on the power supply!

 

Содержание 3540 M

Страница 1: ...User s Manual Step Motor Driver 3540 M 7 14 98 ...

Страница 2: ...t Microstepping CE Mark Dual bipolar MOSFET H bridge pulse width modulated three state switching at 20kHz 12 42 VDC input 0 4 3 5 amps phase output current switch selectable in 0 1 A increments 122 watts maximum output power Automatic idle current reduction switch selectable reduces current to 50 of setting after one second Step direction and enable optically isolated 5V logic 5mA signal sink requ...

Страница 3: ...the section entitled Choosing a Power Supply for help in choosing the right power supply 5 volts DC 15mA to activate the optoisolation circuits if you don t use 5 volt logic see page 6 This is provided by most indexers and PLCs a source of step pulses capable of sinking at least 5 mA if your application calls for bidirectional rotation you ll also need a direction signal capable of sinking 5 mA a ...

Страница 4: ...l labeled VDC Connect power supply Ð to the drive terminal labeled VDC Ð Use no smaller than 20 gauge wire Be careful not to reverse the wires Reverse connection will destroy your driver void your warranty and generally wreck your day Connecting the Motor Warning When connecting the motor to the driver be sure that the motor power supply is off Secure any unused motor leads so that they can t shor...

Страница 5: ...e the power supply voltage exceeds the motor voltage the less current you ll need from the power supply We recommend the following selection procedure 1 If you plan to use only a few drives get a power supply with at least twice the rated phase current of the motor 2 If you are designing for mass production and must minimize cost get one power supply with more than twice the rated current of the m...

Страница 6: ...ices are directly compatible with this drive Logic low or 0 for a given input occurs when that input is pulled to less than 0 8 volts DC In this state the LED is conducting current Logic high or 1 occurs when the input is greater than 4 volts or open STEP tells the driver when to move the motor one step The drive steps on the falling edge of the pulse The minimum pulse width is 0 5 microseconds DI...

Страница 7: ...01 inches step Setting the step resolution is easy Look at the dip switch on the 3540 M Next to switches 2 and 3 there are labels on the printed circuit board Each switch has two markings on each end Switch 2 is marked 1 5 1 10 at one end and 1 5 1 64 at the other Switch 3 is labeled 1 2 1 5 and 1 10 1 64 To set the drive for a resolution push both switches toward the proper label For example if y...

Страница 8: ...ting Table 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 5 6 7 8 9 Setting Phase Current Before you turn on the power supply the first t...

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