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Please download and install the latest software from

The installation will create a Windows™ Start button link to further help and to the KMotion Setup and Tuning Application.


Remove the KFLOP Board from the anti-static packaging in a static safe environment.

Note: immediately before touching any electronic component, always discharge any static electricity you may have by touching an earth ground, such as the metal chassis of a PC.

KFLOP may operate powered from the USB by inserting J3. Total power must be < 0.5A for USB powered operation. Otherwise remove J3 and connect a +5V power supply to the KMotion 4 pin Molex connector. This connector is the same Pinout as a PC Disk Drive power connector. The +12V is not required for operation, it is routed internally through the board to several of the connectors. See the on-line help section titled Hardware/Connector Description for more information.

Note: KFLOP may at times draw as little as 0.25 Amps from the +5V supply. Some PC power supplies will not function without a minimum load. In these cases an appropriate power resistor (~10 ohm 5 Watt) should be added across the +5V. Additionally, most ATX power supplies require pins 14 and 15 on the main 20 pin power connector to be shorted.

Note: it is NOT recommended to use the same power supply that is powering your PC and Hard drives to power the KFLOP. Motor noise and power surges have the possibility to cause damage or loss of data within the PC.

Connect the USB or turn on the +5V supply. Two green LEDs should blink rapidly for a few seconds (KFLOP is checking if the Host is requesting a Flash Recovery during this time), and then the LEDs should remain steady.

Now connect a USB cable from KFLOP to your PC and follow the USB Driver instructions below.

USB Installation

The first time the KFLOP board is connected to a computer's USB port this message should be displayed near the Windows™ Task Bar.

Shortly thereafter, the New Hardware Wizard Should appear.   Select "Browse my computer for driver software".
If you haven't already, download and install the complete KFLOP Software including drivers available at:

Browse to within the subdirectory where you selected the KFLOP Software to be installed to the "USB DRIVER" subdirectory. (If the software was installed into the default subdirectory, the location would be: C:\KMotion4xx\USB DRIVER).


Note: If your system has not received the latest Windows™ security updates, you might get a warning screen. Select "Install this driver software anyway".

If successful, the above screen should appear. Click "Close".   The KFLOP Board is now ready for use. To verify proper USB connection to the KFLOP Board, use the Windows™ Start Button to launch the KMotion Application.
At the main tool bar select the "Console" button to Display the Console Screen. Enter the "Version" command and press "Send". An output message will appear indicating successful communication between the PC and KFLOP.   Go to the Device Manager and right-mouse-click on "KFLOP Motion Controller" under "Other devices" and select "Update Driver Software".
If you are upgrading to a new version of KMotion, follow the steps below:
On the next screen click "Update driver" and follow the steps described above.   If the wrong or no drivers were installed, find KFLOP in the Device Manager and right-mouse-click "Uninstall". On the next screen, select the checkbox next to "Delete the driver software for this device".

See the On-Line help for more information on how to connect your motors drives, enter console script commands, compile and run C Programs, execute G Code, and much more!