Features

Fully supports all Mach3 versions
Full support for USB hot-swappable operation; the card monitors USB connection status at any time
Supports up to 6 axes (depending on model)
Maximum step pulse frequency: 2000 kHz
Status indicator LEDs show USB connection and working status by flashing
16 general-purpose input ports
Supports spindle speed feedback display in Mach3 in real time
All I/O ports are optically isolated, providing strong interference resistance and stable performance

Simple Connection Description

USB Motion Control Card Application

Mach3
Input switches
Spindle
Spindle drive
Tool probe
USB connection
External power input
Motor drives
Relays
Motors

Supported axis configurations:

MK3-IV-II: 3-axis
MK4-IV-II: 4-axis
MK6-IV-II: 6-axis

Signal Description

Wiring Diagram Notes

NOTE:
If the inverter is turned on and the control card does not work properly, the issue is usually caused by electromagnetic interference from the inverter.
Please replace the inverter or apply proper anti-interference measures.

Included wiring diagrams cover:

Inverter speed regulator wiring
Input switch connection
Relay connection
Servo or stepper drive connections
Power input (6–24 V DC)
Inverter control wiring

Electrical Characteristics

Axis Output Control

Output type: Isolated open collector output
Output voltage/current: 5 V, 20 mA
Drive mode: Pulse + Direction
Maximum output frequency: 2000 kHz
Supported axes:
- MK3: 3-axis
- MK4: 4-axis
- MK6: 6-axis
Isolation voltage: 3.5 kV

Spindle Control Output

Analog voltage output: 0–10 V
Output modes supported:
- PWM output: 5 V, 1 kHz, duty cycle 0–100%
- Pulse + Direction output: 5 V, 15 Hz to 4 kHz

I/O Characteristics

Output ports: 8 channels
Drive current: up to 50 mA, maximum voltage 25 V
Isolation voltage: 3.5 kV
Input ports: 16 isolated inputs
Input current: 5 mA
Maximum input voltage: 25 V
Isolation voltage: 3.5 kV

USB Interface

Complies with USB 2.0 standard
Supports full-speed transmission mode

Operation Steps

Step 1: Install Mach3 Software

Double-click the file Mach3Version3.043.066.exe provided with the product and complete the stallation.

Step 2: Copy the Driver Files

Copy the USB card driver files to the specified Mach3 directory.

Refer to the file:
usb card driver-v2.38.9/readme.txt

Step 3: Connect the Control Card

Refer to the wiring schematics to ensure correct connection of the control card.

Step 4: Connect USB Cable

Connect the control card to the computer using a USB cable.

After completing the above steps, you can open the Mach3 software and begin operation.

Refer to the printed manual “Mach3 Parameter Settings” to configure parameters such as pulse equivalent settings.

Wiring Schematics Overview

Power Input

DC input voltage: 6–24 V
Recommended current: 0.5 A

Drive Interface

Supports stepper or servo drives
Pulse + Direction output
Common-anode wiring method
Maximum drive current: 50 mA

Spindle Control Interface

Supports inverter-based spindle control
Digital and analog speed control interfaces

Relay Output Interface

Output ports: OUT0 to OUT7
Output type: Active low
Maximum drive current: 50 mA

Input Interface

Input ports: IN0 to IN15
Input type: Active low
Minimum input current: 5 mA
Supports NPN-type electronic switches only

In Mach3-based CNC systems, selecting a stable and compatible motion control card is critical for accurate motion control and reliable machine operation. This tutorial uses the DAPPRA KA05 Mach3 USB Motion Control Card as an example. All wiring, software configuration, and Mach3 parameter settings described below are based on this controller.

If you would like to view detailed product information and specifications, please visit the DAPPRA KA05 Mach3 USB Motion Control Card product page .

💻 4 Axis Mach3 USB Motion Control Card KA05 – MACH3 Software

🧩 4 Axis Mach3 USB Motion Control Card KA05 – Driver Files

🖥️ 4 Axis Mach3 USB Motion Control Card KA05 – Interface

🔌 4 Axis Mach3 USB Motion Control Card KA05 – Wiring Diagram

Product Selection Table – Mach3 Motion Control Cards

Use the table below to quickly select the most suitable Mach3 motion control card based on axis count, communication interface, and MPG handwheel support.

Model Category	Axis Support	Interface	Mach3 Support	MPG Handwheel	Typical Applications
Mach3 Control Card	3 Axis	USB	✔ All Versions	Wired / Wireless	Entry-level CNC routers, engraving machines
Mach3 Control Card	4 Axis	USB	✔ All Versions	Wired / Wireless	Standard CNC routers, rotary axis applications
Mach3 Control Card	6 Axis	USB	✔ All Versions	Wired / Wireless	Advanced CNC systems, multi-axis linkage
Mach3 Control Card	3 Axis	Ethernet	✔ All Versions	Wired / Wireless	Industrial CNC with higher stability requirements
Mach3 Control Card	4 Axis	Ethernet	✔ All Versions	Wired / Wireless	CNC machines with rotary axis and long cable runs
Mach3 Control Card	6 Axis	Ethernet	✔ All Versions	Wired / Wireless	Professional multi-axis CNC and automation systems

How to Choose the Right Model

Choose 3-axis if your machine is a standard CNC router or engraver
Choose 4-axis if you need a rotary axis or more flexible machining
Choose 6-axis for complex motion control or multi-axis linkage
Choose USB for easy setup and general applications
Choose Ethernet for better noise immunity and industrial environments
Add MPG (wired or wireless) if precise manual jogging and setup are required