C32- DUAL PORT MULTIFUNCTION CNC BOARD
C32 (Rev. 3) User Manual
C32- DUAL PORT MULTIFUNCTION CNC
BOARD Rev. 3
User manual Rev. 1
1. Overview
This card has been designed to provide a flexible connection with drivers and
function boards using (RJ45 cables). It comes with sockets that allow direct
connection of a Smooth Steeper Board (from Warp9 Tech Design Inc) or DB25
connectors. It also serves as an interface board for the pendants provided by
CNC4PC (MPG2, MPG4, MPG12, MPG13, and MPG8).
Features
 Connects directly to the Smooth
Stepper (from Warp9).
The board is provided with sockets
that allow the Smooth Stepper Board
to be plugged directly into this board.
No ribbon cables required.
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
IEEE
1284
Standard
compatible.
Includes the circuitry recommended
by the IEEE 1284 Level 1 standards
for
bidirectional
parallel
communications between personal
computers and peripherals.
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C32 (Rev. 3) User Manual
 Built-in
PWM-Based
Speed
Control.
It has an isolated analog 0-10VDC
output that will convert a PWM signal
into an analog signal that can be used
to command a commercial VFD. This
analog can be adjusted using onboard potentiometer, so this board
can be adjusted to other voltages.
 Built-in
isolated
DC-DC
converter for analog output
voltage.
No need for using an external 12V
power supply to power the analog
output circuit. It now comes with a
built-in DC-DC converter, so the
power for the analog circuit is sourced
from the +5vdc that power the board.
 Two Built-in Electromechanical
Relays with NO and NC positions
for spindle control. This board has
two relays that can be used to control
the direction (CW/CCW) and enable
the drive (On/Off).
 RJ45 Connector for Easy VFD
Connection.
 Monitors E-Stop, Safety Charge
Pump, and Drivers (it only
monitors
G320/340,
G203,
G210/201, Dugong, and Viper
Servomotor drives at this time).
 Enables
drivers.
and
disables
the
 An Electromechanical Relays
with NO and NC positions for
general use (Pin 2_16 or Pin 2_17,
jumper selectable).
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 Microcontroller based SCHP.
This
board
comes
with
a
microcontroller
that
allows
the
implementation
of
a
complex
algorithm for sampling and analyzing
the SCHP signal.
 RJ45 connectors for all I/Os.
You only have to use standard
networks
cable
to
make
all
connections.
 Easy
connections
with
CNC4PC relay boards and speed
control boards.
 Connects 4 and 6
pendants (MPG2, MPG4,
MPG8)

axis
and
Optoisolated inputs.
 Works with regular parallel
ports.
Board C24 (from
CNC4PC) or
Ribbon cables can be used
to
connect regular parallel ports.
 All TTL 5VDC signals.
Interface directly with parallel port
interface products and other CNC4PC
cards. 5VDC (TTL) cards are very
common among automation devices.
 Buffered outputs.
All outputs are buffered through the
use of high speed and high current
buffers, with the result that your
devices receive all the power they
need.
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 Status LEDs on all inputs and
output connections.
No more guessing. You can SEE all
your signals. Save valuable time and
brainpower for CNCing. To avoid
remaining current to the main load
(driver or other device), all the
indicator outputs LEDs are driven by
independent buffers of the ones that
drive de output.
 34 inputs and outputs on 2 ports.
PINS
PORT1
PORT2
TOTAL
INPUT
5
13
18
OUTPUT
12
4
16
TOTAL
17
17
34
 Inputs and outputs with close 5V
and ground connections.
Forget about grounding problems.
Easily connect your pin by using your
close by ground connection. No need
to be an electronics expert to ground
all your stuff.
 Works directly with popular CNC
hardware and software.
That goes for Geckdrive, Rutex and
parallel port control software such as
mach3, Linux EMC2, and TurboCNC.
2. Specifications.
DIGITAL OPTOISOLATED INPUT SPECIFICATIONS
Numbers of inputs
18
On-state voltage range
2 to 5V DC
Maximum off-state voltaje
0.8V
Typical signal delay
2.8uS
DIGITAL OUTPUT SPECIFICATIONS
Number of outputs
16
Maximum output voltage
(5V power supply voltage) + 0.5V
Typical output current
24mA
Maximum off-state voltaje
0.44 V
Maximum supported frequency
4M
Typical signal delay
10 nS
Time of transition to high impedance state
120mS*
*Time passed since a fault in the SCHP signal is detected and the outputs are disabled.
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C32 (Rev. 3) User Manual
3. Powering the Board.
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4. Functional Block Diagrams
4.1
Outputs 2-9 “Port 1” simplified functional block diagram
Fig. 1 Simplified functional block diagram for the outputs 2-9.
Parallel Port coupling is done following IEEE 1284 standard recommendation. The
indicator LED is driven by a different buffer.
4.2
Outputs 1, 14, 16 and 17 “Port 1” simplified functional block
diagram
Fig. 2 Simplified functional block diagram for the outputs 1, 14, 16 and 17.
Note: “Internal Enable” = “E-Stop Pin” AND (“SCHP” OR “Bypassed SCHP”) AND Port 1
connection.
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The “Internal Enable” is the result of an AND Operation among the “E-Stop Pin”, the SCHP
operation mode selected by the user and the port 1 connection to the PC parallel port or
the Smooth Stepper.
4.3
Simplified block diagram for inputs
Fig. 3 Simplified functional block diagram for the Port 1 inputs.
Fig. 4 Simplified functional block diagram for the Port 2 inputs.
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5. Special Functions
5.1 Safety Charge Pump “SCHP”. (Pin 17 “Port 2” )
This board takes advantage of Mach3’s ability to send a specific frequency through
one of the pins of the parallel port when the program is in control of the system.
CNC machinery can be very dangerous, and you could have a risk of the machine
doing something different that what you intend the machine to do if the program
loses control of your system. Mach be can be programmed in a way, so when it is
“in control”, it delivers a 12.5 KHz signal through one of the pins. This card lets you
use this signal to work as an On/Off switch for your system, enabling a powerful
safety system for your equipment. If you ever had windows crash on you, then this
card is for you. The port can also do weird things while the system is coming up, or
down.
For Configuring the Charge Pump in Mach X: Use the dialog Config / Ports and
pins / Output Signals. Enable the Charge Pump output and configures it as is
shown in the Fig. 12 Next, press the apply button.
Fig. 5. Charge Pump configuration
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Selecting the SCHP operation mode
Onboard DIPSWITCH allows activating or deactivating the SCHP detection
function.
SWITCH 2 ON: Activate the SCHP detection function.
SWITCH 2 OFF: Deactivate the SCHP detection function.
Note: When the Safety Charge Pump is activated, 5V in the E-Stop terminal and a valid
SCHP signal is present, Pin 17 Port 2 will go high, This high signal can be used to enable
other external devices, such as enabling other Breakout Boards, or relays that would
enable servos, VFDs, contactors, etc….
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5.2
Variable Speed Control (pin 14 “Port 1” ) and VFD
connection.
Variable Speed Control allows controlling the spindle with PWM and direction
signals, as if it was an axis motor. It converts the PWM signal into an analog (010VDC).
A Variable Frequency Drive or Inverter works by modifying the frequency for AC
motors. You can control most of these devices with an external analog signal (010VDC). That is, if there is 5VDC coming into through the control signal, the motor
will run at 50% of full speed, if there was 10VDC, the motor will run at 100% of full
speed. If there is no signal coming out, then the motor will stop.
This function can also be used on many DC motor controllers by replacing the
potentiometer that controls the speed.
WARNING:
You will require a voltmeter to fine tune your system.
Before connecting anything, please be sure to read your VFD’s manual and make
sure you understand all the safety issues.
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Operation Mode Selection Jumper
This jumper allows selecting the way how the relays are activated when a PWM signal and
REV signal are present in the pins 1_14 and 1_16.
The difference between the two modes of operation is that on US mode one relay is used,
one to start on CW and the other one to start on CCW. On the international mode one
relay is used for on/off, and the other one to indicate the CW or CCW rotation of the
spindle motor. This board uses the step and direction setting for the spindle motor under
motor output in mach3 to generate the required action on the relays. For both cases the
presence of PWM will indicate spindle start.
See the tables below.
US MODE (INT)
PIN
1_14
PWM
PWM
0
0
RELAYS
1_16
1
0
1
0
REL 1
OFF
ON
OFF
OFF
REL 2
ON
OFF
OFF
OFF
OPERATION
Spindle ON CCW
Spindle ON CW
Spindle Off
Spindle Off
INTERNATIONAL MODE (INT)
INPUTS
1_14
PWM
PWM
0
0
1_16
1
0
1
0
RELAYS
REL 1
ON
ON
OFF
OFF
REL 2
ON
OFF
OFF
OFF
OPERATION
Spindle ON CCW
Spindle ON CW
Spindle Off
Spindle Off
Relay 1 and 2 (Pins 16 “Port 1”)
They can be used to control the VFD. The relay specification are shown in the
below table.
ELECTROMECHANICAL RELAYS SPECIFICACTIONS
Maximum Current (AC)
[email protected]; [email protected]
Maximum Current (DC)
[email protected]; [email protected]
Relays 1 and 2 Specifications.
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C32 (Rev. 3) User Manual
RJ45 for VFD Connection
This RJ45 let you make an easy connection between this boars and the VFD.
RJ45 PIN
1
2
3
4
5
6
7
8
RJ45 for VFD
Function
Analog. GND
Analog Output
Not Used
REL 1 Normally Open Contact
Ext. GND
REL 2 Normally Open Contact
Ext. 12VDC or 24VDC
Relay Common
An. GND: Ground of the Analog output signal
Analog Output: Isolated Analog Output Signal (0-10V)
Ext. GND: External 12V or 24V power supply GND.
Ext. 12VDC or 24VDC: External 12VDC or 24VDC power supply used to enable the VFD.
Relay Common: The signal or voltage wired to this terminal can be connected to the common
terminals of the relay 1 and relay 2. Use the on-board RELAY COMMON JUMPERS to do this
connection. Remove the jumper if this connection is not required.
For additional wiring diagrams, check the bottom of the product’s page:
http://www.cnc4pc.com/Store/osc/product_info.php?products_id=255
Configuring the Control Software:
It is strongly recommend you read your control software’s manual. You need to
configure your control software to control the spindle as if it was an angular axis.
This card requires a PWM input signal to deliver 10VDC. So you have to set the
speed of the motor (spindle) at maximum. For acceleration values adjust them to
where you feel comfortable. Keep in mind the acceleration of the motor must also
be set in your VFD.
For configuring Mach follow these steps:
1. Go to Config / Ports&Pins / Motor Outputs. Enable the spindle and select the port
and pins you wired for step and direction.
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Fig. 2. Ports&Pins configuration screenshot
2. Go to Config / Ports&Pins / Spindle Setup. In the motor control box, check Use
Spindle Motor Output and Step /Dir Motor. Under Pulley Ratios set the pulley
ratios of the machine.
Fig. 3. Spindle Setup screenshot
Go to Config / Motor Tuning / Spindle. On Steps per unit put 1,000, set velocity to
maximum. For Acceleration, choose the acceleration that you feel comfortable with.
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Start slow, increase acceleration as you test your system. Under Step Pulse length,
use a number from 3 to 5, but start with 3. This number is directly proportional to the
final voltage you will get in the analog output. Use this number and the fine tuning pot
to adjust the voltage you want to get at max speed.
Fig. 4. Motor Tuning and Setup screenshot.
After configuring the Mach, these steps should be followed.
Step 1. Ensure that all external power sources are set to OFF.
Step 2. Connect the power supply to the Power Inputs Terminals.
Step 4. Turn on the external supplies
Step 5. Connect a multimeter in the analog outputs connectors and make a fine
tune to this output:
Make sure that when you reach the max speed in the
control software you get 10VDC out. This voltage can
vary depending on many things, including the electrical
properties of parallel port or breakout board you are
using, the length of the step pulse your software is
delivering, and the normal hi or low status of your step
pin. Play with the fine tuning pot in the card, the normally
hi or low status of your pin, and the pulse width.
Step 6. Turn off the external supplies
Step 7. Connect the analog output and external Relay contacts.
Step 8.Turn on the external power supplies.
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C32 (Rev. 3) User Manual
Replacing a Potentiometer:
This circuit can be used to replace a potentiometer of
DC motor speed control circuits. This speed controller
circuits are very commonly used by SIEG, KB
Electronics, and many other oriental machines. Before
explaining how to do it, please first keep in mind that it
can be done if the voltage that goes though the pot is
+12vdc or less. This circuit cannot be used for AC
currents.
In most cases the terminals that go to the potentiometer
will carry these signals:
P1 = GND
P2 = WIPER
P3 = REFERENCE VOLTAGE
These are the steps for replacing a potentiometer:
1. Measure the voltage difference between P1 and P3. Make sure it measures
under +12vdc.
2. Fine tune the analog output to the output voltage you got from step 1.
3. Connect the ground from the analog output to the ground of the
potentiometer (P1).
4. Connect the analog output to the wiper connection of the potentiometer
(P2).
5.3
Electromechanical relay 3. (Pin 1 Port 1)
This can be used for AC or DC and come with NO and NC (Normally Open and
Normally Closed) positions. The relay specification are shown in the below table.
ELECTROMECHANICAL RELAY SPECIFICACTIONS
Maximun Current (AC)
[email protected]; [email protected]
Maximun Current (DC)
[email protected]; [email protected]
Relays 3 Specifications.
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5.4 Microcontroller based driver monitoring system.
This board incorporates a microcontroller that runs programs that monitor the
drivers, e-stop and perform other functions.
Functions:
 Enables and disables the drivers.
 Monitors E-Stop.
 Monitors Safety Charge Pump.
 Monitors the Drivers errors pins. (it only monitors G320/340, DG2S Servo
driver and Viper Servomotor drives at this time).
 Indicates the fault source.
 Indicates the system Status.
5.4.1 Configuration DIPSWITCH
DIPSWITCH allows activating or deactivating the SCHP detection function, and
selecting the driver to be monitored.

SWITCH 1
SWITCH 1 OFF: Delayed enable output (Pin 17-Port 2).
SWITCH 1 ON: Non Delayed enable output (Pin 17-Port 2).
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The enable output will be activated when the driver enable process starts. A delay
in the signal activation time could be added by selecting the OFF position in the
DIPSWITCH 1. The table below shows the delay time for every supported driver.
DRIVER
DELAY (Sec.)
G320/340
5
G203
2
G210/201/Keling
2
Viper Servodriver
5

SWITCH 2
SWITCH 2 ON: Activate the SCHP detection function
SWITCH 2 OFF: Deactivate the SCHP detection function

SWITCH 3 and 4
Select the driver you will use according to the below table.
DRIVER
G320/G340
G203
G210/201/Keling
Viper /Dugong
DIP 3 DIP 4
0
0
1
0
0
1
1
1
5.4.2 Program description
Connect the driver ERR/RES (servo drivers) or EN (stepper driver) terminal to the
pin 5 of each RJ45 driver connector.
ERR/RES (servo drivers) or EN (stepper driver) descriptions
Operation Mode 1 (G320/G340)
When the system starts, the C32 error/reset pins go to a low state (0V), making
sure the driver remains disabled. When SCHP and E-Stop function are checked
and validated and there is no fault signal coming from a driver, the system send a
high (5V) to the driver’s error/reset pins for about 5 seconds to enable the drivers.
After that the system monitors the driver’s err/res pins. If a fault occurs on any
driver (0V in driver ERR/RES pin) or an external fault occurs (E-Stop or SCHP
fault), the system stops and sends an e-stop signal (Active low) to the controller.
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All outputs on the board are disabled and the drivers will be disabled by sending a
LOW (0V) to the drivers ERR/RES pin. The system will remain that way until the
conditions to restart are present again.
Operation Mode 2 (G203).
When the system starts, the C32 enable pins go to a HIGH state (5V). When
SCHP and E-Stop function are checked and validated, the system send a LOW
(0V) to the driver’s EN pin for about 2 Sec, enabling the drivers. If an external error
occurs, the system stops, resets the CNC software and sends a HIGH (5V) to the
drivers EN pin. The system will remain that way until the conditions to restart are
present again.
Operation Mode 3 (G210/201).
When the system starts, the C32 enable pins go to a LOW state (0V). When
SCHP and E-Stop function are checked and validated, the system send a HIGH
(5V) to the Drivers EN pin for about 2 Sec, enabling the Drivers. If an external
error occurs, the system stops, resets the CNC software and sends a LOW (0V) to
the drivers EN pin. The system will remain that way until the conditions to restart
are present again.
Operation Mode 4 (Viper & Dugong).
When the system starts, the C32 enable pins go to a low state (0V). When SCHP
and E-Stop function are checked and validated and there is no fault signal coming
from any driver, the system sends a high (5V) to the driver Fault output pin,
enabling the drivers. After that the system monitors the driver’s Fault Output pin.
If an error is generated in any driver (0V in driver Fault Output pin) or an external
error occurs, the system stops, resets the CNC software and sends a LOW (0V) to
the drivers to ensure they remain disabled.
LEDs indicator Operation
The standby LED lights to indicate that the system is ready but disabled.
There are 3 possible error sources, a driver fault, an E-STOP error and a SCHP
error. An LED will light next to the source of the fault to indicate the cause.
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6. Pinouts
Fig. 9. RJ45 Distribution
RJ45_1
RJ45 PIN
P.P. PIN
1
NC
2
1_2
3
NC
4
GND
5
Err/res X
6
1_3
7
NC
8
5V
Supported connection
G320/G340
G203
G210/G201
Viper Servomotor
Dugong DC Servo Driver
RJ45_7
RJ45 PIN
P.P. PIN
1
GND_EXT
2
1_13
3
1_12
4
1_11
5
NC
6
NC
7
5V_EXT
8
2_16
Supported connection
C16
RJ45_2
RJ45 PIN
P.P. PIN
1
NC
2
1_4
3
NC
4
GND
5
Err/res Y
6
1_5
7
NC
8
5V
Supported connection
G320/G340
G203
G210/G201
Viper Servomotor
Dugong DC Servo Driver
RJ45_3
RJ45 PIN
P.P. PIN
1
NC
2
1_6
3
NC
4
GND
5
Err/res Z
6
1_7
7
NC
8
5V
Supported connection
G320/G340
G203
G210/G201
Viper Servomotor
Dugong DC Servo Driver
RJ45_8
RJ45 PIN
P.P. PIN
1
GND_EXT
2
NC
3
NC
4
2_11
5
1_15
6
NC
7
5V_EXT
8
NC
Supported connection
C3
RJ45_4
RJ45 PIN
P.P. PIN
1
NC
2
1_8
3
NC
4
GND
5
Err/res A
6
1_9
7
NC
8
5V
Supported connection
G320/G340
G203
G210/G201
Viper Servomotor
Dugong DC Servo Driver
RJ45_9
RJ45 PIN
P.P. PIN
1
GND
2
2_17
3
2_16
4
2_1
5
2_14
6
NC
7
5V
8
NC
Supported connection
C19, C15, C5, C8 or C9
RJ45_5
RJ45 PIN
P.P. PIN
1
NC
2
1_1
3
NC
4
GND
5
Err/res 5
6
1_14
7
NC
8
5V
Supported connection
G320/G340
G203
G210/G201
Viper Servomotor
Dugong DC Servo Driver
RJ45_10
RJ45 PIN
P.P. PIN
1
GND
2
NC
3
NC
4
2_16
5
2_17
6
NC
7
5V
8
NC
Supported connection
C15, C8 or C9
RJ45_6
RJ45 PIN
P.P. PIN
1
NC
2
1_16
3
NC
4
GND
5
Err/res 6
6
1_17
7
NC
8
5V
Supported connection
G320/G340
G203
G210/G201
Viper Servomotor
Dugong DC Servo Driver
RJ45_11
RJ45 PIN
P.P. PIN
1
GND_EXT
2
2_15
3
2_13
4
2_12
5
2_10
6
NC
7
5V_EXT
8
NC
Supported connection
General Use
*NC: Not Connected
M_N: Parallel port or Smooth Stepper pin, where M is the port number and N is the pin number.
* When connecting optoisolated boards, a connection between the ground of the C32 and the board
must be used. This is the case for the C15 and C19
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7. Connecting a Pendant.
Set the pendant enable jumper in ENABLE position if a pendant is connected to
the DB25 connector.
Pins 2_10, 2_11, 2_12, 2_13 and 2_15 are able to be used with the pendant
(DB25 connector) or as general use input pin (RJ45 connector). Set the Pendant
ON/OFF selection jumper in ON position if a pendant is connected to the DB25
connector. Otherwise set jumpers in OFF position.
Fig. 9 Pendant ON/OFF selection jumper.
Note: Pins (2_2 - 2_9) are configured as inputs and they are only accessible
through the DB25 for Pendant.
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8. Wiring diagrams
While this board supports only TTL +5VDC signals, different kind of sensors,
switches using different voltages can be connected using the diagrams that follow:
Note: The below wiring diagrams are an example, any input can be used for the connections.
Fig. 10 Wiring diagram to connect switches.
Fig. 11 Wiring diagram to connect NPN open collector proximity sensors.
For a 24V or 12V sensor, the recommended value for the external resistor R1 is
4.7K Ohm.
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Fig. 12 Wiring diagram to connect in parallel NPN open collector proximity sensors.
Fig. 13 Wiring diagram to connect NPN proximity sensors with internal pull up resistor.
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Fig. 14 Wiring diagram to connect PNP open collector proximity sensors
Connecting PNP open collector proximity sensor with the C32 Rev.3
Board
C32 Rev. 3
R Value (12V)
470Ω
R Value (24V)
1KΩ
Table 15. R value to Connect PNP open collector proximity sensor with the C33.
Fig. 16 Wiring diagram to do an “Auto Tool Zero”
Revision:3/28/2012
http://cnc4pc.com/TechDocs/C32R3_User_Manual.pdf
23/27
C32 (Rev. 3) User Manual
9. Dimensions.
All dimensions are in Millimeters.
Disclaimer:
Use caution. CNC machines could be dangerous machines. DUNCAN USA, LLC
or Arturo Duncan are not liable for any accidents resulting from the improper use of
these devices. The board is not fail-safe device, and it should not be used in life
support systems or in other devices where its failure or possible erratic operation
could cause property damage, bodily injury or loss of life.
Revision:3/28/2012
http://cnc4pc.com/TechDocs/C32R3_User_Manual.pdf
24/27
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