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Lerdge-K Motherboard Basic Wiring Instructions

Lerdge-K Motherboard Basic Wiring Instructions

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Lerdge-K Motherboard Basic Wiring Instructions


Lerdge-K Motherboard Interface definition map

Lerdge-K Motherboard Basic Wiring Instructions


1. Power supply wirings


There is a dedicated power cable supporting with the motherboard. The power cable is separated into one red line and one black line. The red line is connected with DC 12V/24V power positive, and the black one is connected with the negative.The power interface on the board side is with buckle to prevent incorrect insert, but still need to pay attention to that. Incorrect connection of the positive and negative poles of the power supply may burn the motherboard。The correct power wiring as shown below.


Lerdge-K Motherboard Basic Wiring Instructions

2. Motherboard motor drive module socket introduction


Lerdge-X motherboard motor drive port adopts the same interface definition with pololu module. The motherboard driver interface definition as shown below

Lerdge-K Motherboard Basic Wiring Instructions


Port

Description

Note

ENABLE

Motor enable control port, the system uses low-level enable program.


When the motor needs to be enabled, the ENABLE port outputs a low level (0V)


When the motor needs to be disabled, the ENABLE port outputs a high level (5V)


The port control logic can not be modified.

MS1、MS2、MS3

Motor drive module subdivision control ports. Please check the table below for the specific configuration method.

Insert the jumper cap is high level (5V) H

Remove the jumper cap is low level (0V) L

RESET

Motor drive module reset port. Connected to 5V through 20K resistor.

Uncontrollable

SLEEP

Motor drive module sleep port, linked with RESET

Uncontrollable

STEP

Motor drive pulse control port

The maximum frequency of driving pulse is 200KHz


Pulse high level duration> 2.5us

DIR

Motor drive module direction control port


VIMOT

Stepper motor drive voltage input positive

8~35V,  consistent with the motherboard power supply voltage

VIGND

Stepper motor drive voltage input negative


VCC

Motor drive module logic power positive

5V

GND

Motor drive module logic power negative



The 3 pairs of pins in the mainboard motor module sockets can be used to set the subdivision of the motor drive module. For the specific setting method, please refer to the drive module introduction table.


Lerdge-K Motherboard Basic Wiring Instructions

Lerdge-K Motherboard Basic Wiring Instructions


3. Install the motor drive


Note: When plugging in the motor drive module, please turn off the power. Do not operate while power is on. Please distinguish the direction of the motor drive module, or it may damage the board!!!


To improve the user experience, the colors of the Lerdge motor driver pins are corresponding to the colors of the motherboard driver sockets. Please insert the drivers correspond to the color, do not insert the wrong direction or the wrong place! ! !  The Lerdge drivers are recommended.


4. Connect the stepper motor

Before connecting the stepper motor, need to check the motor line order. The normal two-phase stepper motor has 4 drive lines, a pair of two, namely a motor coil. Usually, the motor manufacturer will provide the line order drawing. As shown in the following figure, the AC is a group and the BD is a group. Respectively, the terminal numbers 1 and 3 is a group, 4 and 6 is a group.


Lerdge-X Motherboard Basic Wiring Instructions


If there is no drawing, first rotate the output shaft of the motor by hand and feel the resistance when the motor rotates. Then, shorten any one of the four lines of the motor with the other three lines, respectively. For each short circuit, rotate the motor output shaft again by hand. When the rotation resistance of the output shaft is obviously increased, it can be determined that two drive lines short-circuited together are output by one coil of the motor, they are a group, and the other two as another group.


Lerdge-X Motherboard Basic Wiring Instructions


After determining the line grouping, mark the two groups of lines as Group A and Group B respectively (Just assume one group is A , then the other group is B), and then connect the two motor wires of Group A respectively to the A + and A- of a motor port on the mainboard (there is no need to distinguish between A + and A- of the two lines). Connect the two motor wires of the Group B to the B+ and B- of the same motor port  (No need to distinguish B+ and B-). To change the position of two motor lines in any group can change the rotation direction of motor output shaft. For non-corexy printer  users, the motor direction can be directly modified in the system. However, users of corexy models need to pay attention that sometimes need to adjust the motor's line order to to change the corexy running direction.



Lerdge-K Motherboard Basic Wiring Instructions



In order to meet the needs of various models, the Lerdge-K motherboard integrates an EX axis to assist other axes. The user can synchronize the EX axis with any other axis to realize the dual motor drive mode of one axis. The user can set the function of the EX axis motor in the 'Advanced Setting' option of 'Model Setting'. The setup menu is shown below. Since the system is a synchronous axis function, not a synchronous motor function, so some models cannot be synchronized in some models.


Lerdge-K Motherboard Basic Wiring Instructions


5. Connect the limit switch

First of all, explain what do the limit switch normal open and normal close mean.

Usually a micro switch has 3 ports, namely C terminal, NO terminal and NC terminal, respectively means

C: Common port

NO: Normal Open

NC: Normal Close

As shown below:

Lerdge-K Motherboard Basic Wiring Instructions

When using C and NC, the C terminal and the NC terminal is connected together when the switch is not triggered. And when triggered, C and NC disconnected. This connection is Normal Close.


When using C and NO, the C terminal and the NC terminal are disconnected when the switch is not triggered. When the switch is triggered, the C terminal and the NO terminal are connected and conducted together. This connection method is Normal Open.

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