: Ensure the plotter is set to HPGL mode for the best software compatibility. 💻 Compatible Software Most users control the Go to product viewer dialog for this item.

Modern production runs of the JK 721 almost exclusively use the inexpensive and reliable CH340 chip manufactured by WCH.

If the COM port number is 10 or higher , right-click the device > Properties > Port Settings > Advanced and change the COM Port Number to a lower value (ideally COM 1-4 ). 4. Software Setup

Setting Up Your JK 721 Cutting Plotter on Windows 10 Installing the JK 721 cutting plotter

Select JK , Jinka , or Redail (these brands often share the same motherboard design).

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The driver alone is insufficient. You must use that sends HP-GL commands:

If your JK 721 is an older model, it may feature a Prolific or FTDI chip.

Lower the Baud Rate in both Device Manager and your cutting software to 4800 .

, and look for an "Unknown Device" or "USB-Serial CH341." Right-click it to update or reinstall the driver. Verification

Once Windows 10 recognizes the virtual COM port, you must match these settings inside your design and cutting software. General Software Settings

Which (e.g., SignMaster, Artcut, Flexi) are you planning to use?

If the COM port number is 10 or higher, you may need to change it to a lower number (1-9) in the Advanced Port Settings for better software compatibility. Software Setup In your cutting software (e.g., Artcut, SignCut, or Refine MH/EH 721 as the device model.

I can provide the exact steps to get your project cutting smoothly. Share public link

, locate the "Ports (COM & LPT)" section. The plotter often defaults to

The JK 721 is a highly popular, budget-friendly vinyl cutting plotter widely used by small businesses and hobbyists for creating signs, decals, and custom apparel. However, because it relies on older USB-to-serial communication technology, users frequently run into connection issues when upgrading to or installing it on Windows 10.