1

1

2

2

3

3

4

4

D

D

C

C

B

B

A

A

Title

Number

Revision

Size

Letter

Date:

3/14/2007

Sheet of

File:

C:\Program Files\..\Chopper_A.SchDoc

Drawn By:

R10

47

R11

47

Q1
IRL640

Q2
IRL640

R14a
0.2 Ohm 5 Watt

Vsense1

Coil_A

Coil_A

VREF1

VCC

Phase_A

Phase_A

VREF1

COIL_A

COIL_A

VREF1

Phase _A

Phase _A

Coil_A

Coil_A

C12

10 uF 16 Volt

MARDUS-KREUTZ CHOPPER WITH L6506

KREUTZ

0.00

SYNC

SYNC

VCC

GND

VCC

C13

0.1 uF Ceramic

C16

0.1 uF

R14
0.2 Ohm 5 Watt

2/3

Use IRL640 logic input power MOSFETS

The 47 ohm (1/8 watt) gate resistor value is subject to change depending on
Turn-on and Turn-off times of the chosen mosfet, a resistor is often
necessary in order to suppress ringing

C11

10 uF 16 volt

VDD

R/C

1

O

S

C

2

S

y

n

c

3

Pwr EN

4

In1

5

In2

6

In3

7

In4

8

G

N

D

9

Vs1

10

Vs2

15

Ref1

16

Ref2

17

Out4

11

Out3

12

Out2

13

Out1

14

V

C

C

1

8

U4
L6506

VREF2

Phase_B

Phase_B

Phase_B

Phase_B

VREF2

VREF2

Q3
IRL640

Q4
IRL640

R15
0.2 Ohm 5 Watt

R15a
0.2 Ohm 5 Watt

Coil_B

Coil_B

R12

47

R13

47

VCC

R9
10k

COIL_B

COIL_B

Coil_B

Coil_B

NC

1

INA

2

GND

3

INB

4

OUTB

5

VDD

6

OUTA

7

NC

8

U5

TC427CPA

NC

1

INA

2

GND

3

INB

4

OUTB

5

VDD

6

OUTA

7

NC

8

U6

TC427CPA

VDD

C15
0.1 uF ceramic

C14

10 uF 16 Volt

VDD

VDD

Vsense2

1

1

2

2

3

3

4

4

D

D

C

C

B

B

A

A

Title

Number

Revision

Size

Letter

Date:

3/14/2007

Sheet of

File:

C:\Program Files\..\Input-Power.SchDoc

Drawn By:

IN

1

2

OUT

3

GND

U8

MC7805BT

C1

100 uF 25 volt

C4
10 uF 16 volt

VCC

C3
1 uF

C2
1 uF

VMotor

J1

Socket

J2

Socket

C7
470 uF 160 volt

VCC

M

Motor Stepper

VMotor

MARDUS-KREUTZ UNIPOLAR STEPPER DRIVER WITH L6506

0.00

KREUTZ

+12 TO +15 VOLT DC INPUT

+80 VOLT MAX

POWER GROUND

1

2

3

4

5

6

7

8

9

10

P4

Header 5X2

VCC

Phase_A

Phase_A

Phase_B

Phase_B

VREF_Channel A

VREF_Channel B

VREF2

VREF1

Phase_A

Phase_B

Phase_A

Phase_B

R7

5k

R8

5k

R6

10k

R5

10k

VREF_Channel A

VREF_Channel B

PowerGround

1
2

P5

Header 2

C10
0.01 uF

C9
0.01 uF

+V

+V

A

A-

B

B-

To Translator Stage

Gnd test points on the board

J?

Socket

+5 Volt

R1, R2, R3 and R4 (4.7K) pull-down resistors are required in order to avoid the output
transistors to turn on during power up or in case the translator circuit is not connected
to the board, and during the microcontroller initialization stage after reset or power up.
+12 volt must be present before powering up the +Vmotor power supply.

For 8 Amp option use 2 Oz copper FR4 pcb or beefup with solder the PCB traces
corresponding with the coil connections and +Vmotor. Replace also the 10 Amp slow
Blow fuse by 20 Amp Slow Blow Fuse. 10 Amp fuse has been calculated for 4 Amp
peak coil current. Keep the Sensor resistor's bodies separated from the PCB board by
at least 1 mm.

F1

10A T

+V

PWM filter fc ~ 1.5 khz

PWM filter fc ~ 1.5khz

1/3

TP2

TP3

R2
4.7K

R1
4.7K

R3

4.7K

R4

4.7K

VCC= 5.0 Volt

VDD

C5

100 uF 25 volt

VDD= 9 Volt

IN

1

2

OUT

3

GND

U7

L7809ABV

C6
1 uF

1

1

2

2

J3

Term. Box 2 pos

C8
1 uF Metalized Polypropylene 250 V

PB1

Phase_A

Phase_A

V

R

E

F

1

COIL_A

COIL_A

S

Y

N

C

VCC

G

N

D

V

R

E

F

2

Phase_B

Phase_B

COIL_B

COIL_B

VDD

U_Chopper_A
Chopper_A.SchDoc

VDD

1

1

2

2

3

3

4

4

D

D

C

C

B

B

A

A

Title

Number

Revision

Size

Letter

Date:

3/14/2007

Sheet of

File:

C:\Program Files\..\Translator2.f.SchDoc

Drawn By:

1

2

Y?

20 MHz

RESET

1

PD0 (RXD)

2

PD1 (TXD)

3

XTAL2

4

XTAL1

5

PD2 (INT0)

6

PD3 (INT1)

7

PD4 (T0)

8

PD5 (T1)

9

GND

10

PD6 (ICP)

11

PB0 (AIN0)

12

PB1 (AIN1)

13

PB2

14

PB3 (OC1)

15

PB4

16

PB5 (MOSI)

17

PB6 (MISO)

18

PB7 (SCK)

19

VCC

20

U2

ATTINY2313-20PI

1

2

U3A

M74HC14B1R

3

4

U3B

M74HC14B1R

5

6

U3C

M74HC14B1R

9

8

U3D

M74HC14B1R

11

10

U3E

M74HC14B1R

13

12

U3F

M74HC14B1R

VCC

DIR

STEP

Phase_A

Phase_A

Phase_B

Phase_B

VREF_Channel A

VREF_Channel B

1

2

3

4

5

6

7

8

9

10

P2

Header 5X2

C23
0.1 uF

C27
10 uF 16 volt

R16
10K

R17
10K

R18
10K

R19
10K

R23

10K

R24
10K

VCC

VCC

VCC

VCC

R25
10K

C26
10 uF 16 volt

PD6
PD5
PD4
PD3

PD1
PD0

Jumpers S1-1-2 to S1-5-6 binary encoded
PD3 PD1 PD0
0 0 0 Full step
0 0 1 Half step
0 1 0 1/4 Step
0 1 1 1/8 Step
1 0 0 1/16 Step
1 0 1 1/5 Step
1 1 0 1/10 Step
1 1 1 Reserved for testing and adjustment
--------------------------------------------------------------------------------------
S1-7-8 RESERVED FOR NEW FEATURES
1 Sec standby current reduction R39=R40= 1K => 50% reduction
1= OFF position
0= ON position

2.1F-00

KREUTZ

MARDUS-KREUTZ TRANSLATOR STAGE with AT TINY2313

C24
22 pF

C25
22 pF

1 Anode

1

1 Cathode

2

2 Cathode

3

2 Anode

4

GND

5

2 Output

6

1 Output

7

VCC

8

U1

HCPL2631

VCC_PC

VCC_PC

R21
330

R22
330

VCC

STEP-DIR from Breakout Board

TO MICROSTEPPER POWER STAGE

OPTO-ISOLATION STAGE

VCC

PB2

PD5

PD0

PD1

PD3

PD4

Jumper Settings

PB0

PB1

PB3

PB4

PB5

PB6

PB7

3 /3

C22
0.1 uF

STEP and DIR signals from the Printer port are "active
Low".

R20
330

DS1

RED LED

PB1

ERROR / OUTPUT DISABLE

R28

1k

R31

1k

R29
1k

R32
1k

VREF_Channel A

VREF_Channel B

R30

100

R33

100

TP1

1

2

3

4

5

6

7

8

S?
Header 4X2

Current reduction Jumper

PB2

FEATURES: 39.2 KHZ PWM Chopper frequency with programmable "Blanking time"
40 KHZ PWM type DAC for Reference 1 and Reference 2 Microstep reference waveforms.
Active Low STEP and DIRECTION optically isolated inputs.
MAXIMUM COIL CURRENTs adjustable from 0.5 TO 8 Amps.
Automatic coil current reduction after 1 seconds (selectable %)
Microstep Modes: Full, Half, 1/4, 1/5, 1/8, 1/10, 1/16

PD5A

PD5A

R26
10k

VCC

R27

330

DS2
Yellow LED

VCC

Current reduction Indicator

Q?
2N7002

Q?
2N7002

PB0

PB1

PB2

PB3

PB4

PB5

PB6

PB7

1

2

3

4

5

6

ISP

Header 3X2

VCC

PB5

PB6
PB7

RST

RST

6 PIN ISP programming interface

C28
0.1 uF

C20
1uF

1

2

3

4

5

P1

Header 5

PB1

P4 pin 5 Error/Enable output (high=Enabled)

for Standby current reduction to 68% use R29=R32= 2.2 Kohm

C29
0.1 uF

C21
2.2 uF

C30
0.1 uF

VCC