Connections

BLOCK DIAGRAM

Connect the various modules that make up the system respecting this diagram:

CONTROLLER BOARD

DC POWER

Use a six-conductor cable to connect the power supply of the controller board (POWER SUPPLY connector) to the power supply board (POWER SUPPLY connector).

Three pairs of cables can also be used.

USB

Connect a common USB cable directly to the Arduino USB port.

STEP-BY-STEP MOTOR DRIVER

(CONNECTORS M1 TO M7)

Use the four-wire cable for the signals respectively:

Connectors Y1 (M1) and Y2 (M2): driver cables of the 2 motors on the Y axis.

Z1 (M3), Z2 (M4), Z3 (M5), Z4 (M6) connectors: driver cables of the 4 motors on the Z axis.

X1 (M7) connectors: X axis motor driver cables.

Follow this table for connecting the driver cables:

Screen printing on card	Color
5V	Red
PUL	Green
DIR	Yellow
EN	Blue

These are the connectors for the various drivers and can be wired with 0.5 mm2 wire.

It is good that the wire is not wound in a spiral (twisted) on the 4 connections relating to each driver.

The driving capacity of the various axes is expressed in the following table:

Axis	Connectors	Piloting skills
X	M7	1 driver
Y	M1, M2	2 driver
Z	M3, M4, M5, M6	4 driver

LIMIT SWITCH (END-STOP)

Use the two-wire cable to connect the limit switches respectively:

X-MIN (M9) and X-MAX (M10) connector: minimum and maximum X axis limit switch.

Y-MIN (M11) and Y-MAX (M12) connector: minimum and maximum Y axis limit switch.

Z-MIN (M13) and Z-MAX (M14) connector: minimum and maximum Z axis limit switch.

EXTRUDER

The extruder assembly includes several cables:

EXTRUDER connector (M8): Four-wire cable of the extruder stepping motor.

RISC connector (M15): Two-wire cable of the heating element.

TERM connector (M18): Two-wire thermistor cable.

VENT connector (M16): Two-wire fan cable (observe polarity).

EXTRUDER MOTOR (M8 CONNECTOR)

This connector transfers the command pulses to the extruder stepping motor.

Having to withstand about 1 A of current for each pin it is advisable to be wired with wires no less than 1 mm2 (18 AWG).

If the cable length exceeds 1 m it is necessary to increase the section to 1.2 mm2.

HEATING ELEMENT

(M15 CONNECTOR)

The connector carries the 12 VDC power supply to the extruder heating resistance.

The wires must have a cross section of at least 1.5 mm2.

Enabling is indicated by the red LED.

THERMISTOR (M18 CONNECTOR)

The connector collects the connections of the thermistor present inside the extruder.

It is important that, in the event that an outgoing connection from the thermistor is connected directly to the metal parts, it is connected to the right pin (if viewed from the front).

The right pin is connected to ground and is distinguishable in the general drawing as it has a square pad.

If in doubt, it is good to check if one of the wires relating to the thermistor really has a direct connection on the metal parts (extruder) and, if so, proceed as indicated.

EXTRUDER FAN (M16 CONNECTOR)

This connector controls, by software, the fan on the extruder.

The wires can have a section of 0.5 mm2.

The enabling of this fan is indicated by the green LED.

SERVICES (M17 CONNECTOR)

There are 12 VDC service for a maximum current that can be drawn equal to 0.4 A.

The polarity is marked with the “+” symbol on the silk-screen.

Any fans not controlled by the software (always active) also intended for cooling the external power supplies can be connected to this terminal.

SD READER DISPLAY (EXP1 AND EXP2)

The connectors have the task of connecting the display-encoder group to the board.

Connect the 12864 display via its 10-wire flat cables.

Connect the first cable to the EXP1 connector and the second cable to the EXP2 connector.

Respect the correct direction on both sides by orienting the cleat on the cable connector towards the slot on the connector on the board.

WARNING!

An incorrect arrangement of the same (they can easily lend themselves to being reversed) can cause irreversible damage.

The maximum length of the flat cable must not exceed 25 cm.

POWER SUPPLY BOARD

AC POWER CONNECTOR

INPUT FROM ELECTRICITY NETWORK

Present on the front panel, it provides AC power to both the board and the external power supplies.

It can be wired with a female plug for IEC type tray, commonly available.

The cable must not have a section less than 1.2 mm2 and must be earthed.

A common 220VAC fixed computer cable can be used.

Before connecting the cable, make sure that the main switch is OFF and that the board is inside an insulating container in order to protect.

DC OUTPUT FOR POWER

CONTROLLER BOARD

Use the cables recommended in the table at the end of this document to connect the two boards, Controller and Power Supply, together.

RC FILTERS

Connect the 220VAC inputs of the two RC filters with a common monitor cable to the connector on the 220VAC output power supply board.

Each cable must have three conductors:

Phase (brown).

Neutral (blue).

Earth (green and yellow).

The inputs of filter 1 and filter 2 can be connected in parallel.

POWER SUPPLY CONNECTIONS

EXTERNAL

OUTPUT AC POWER CONNECTOR

It is present on the front panel.

This is the connector that brings the 220 VAC network back to the external power supplies.

It can be wired with a male plug for IEC type tray, commonly available.

The cable must not have a section less than 1.2 mm2 and must be earthed.

Connect the 220VAC output of the RC filters with four common cables for electrical systems to the four external power supplies:

Exit from Filter 1: power supply 1 and 2.

Exit from Filter 2: power supply 3 and 4.

Each cable must have three conductors: Phase (brown).

Neutral (blue).

Earth (green and yellow).

LOW VOLTAGE (DC)

Use a two-wire cable for each driver respectively (respect the polarity):

Power supply 1: Z1 and Z2 axis driver.

Power supply 2: Z3 and Z4 axis drivers.

Power supply 3: Y1 and Y2 axis drivers

Power supply 4: X1 axis driver.

STEP-BY-STEP MOTOR DRIVER CONNECTIONS

Use the two-wire cables coming from the DC outputs of the power supplies for the power supplies of each driver (positive and negative).

Use the four-wire cable from the controller board for the signals of each driver.

Make the connections and bridges on the driver connectors as indicated in this diagram: