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INTERFACE puts control in your hands, enabling you to Jog, Home, Zero, Load and Run jobs all from a stand alone plug and play hand held pendant.

No computer required! Run your jobs directly at your machine with the OpenBuilds INTERFACE.
Its never been easier, simply load the job, set the starting point and run it.

INTERFACE was designed as a purpose built tool that is a part of your machine. It is rugged, user friendly and it will quickly become a favorite in your shop!


  • Standalone Human-Machine Interface for controlling your machine
  • Tactile haptic and audible feedback system for confirmation in noisy CNC environments
  • Supports Homing, Jogging, Probing, Zeroing and Running your CNC (of USB thumb drive)
  • Capacitive touch switches for the UI
  • Plug-and-play with OpenBuilds BlackBox Motion Controller
  • Can easily be mounted to your machine front with our Mounting Kit Option (Magnet not included)
  • *Note: Can be used with any Grbl 1.1 based controller, which has RX/TX/GND/5V pins (may require you to make your own cabling)

What is Included

  • (1) Interface
  • (1) Surge suppressor board
  • (1) 2.5m Connection cable
  • (1) USB Drive
  • (1) USB-C Cable

Product Specifications

  • 240Mhz 32-bit Xtensa Dual-Core Microprocessor
  • 520Kb SRAM
  • 4Mb Flash
  • 802.11 b/g/n Wifi (Firmware upgrades)
  • Bluetooth v4.2 and BLE
  • High Contrast Color TFT LCD display
  • LED Backlit Capacitive Touch buttons
  • Beeper
  • Vibration Motor
  • USB-C Connectivity
  • Grbl 1.1f and newer Support
  • FAT32 Flash Drive Support
  • RoHS and CE Certified

Assembly/Support/Documentation/3D Models

Easy follow along tutorial videos – awesome community support – top notch documentation

Support OpenBuilds Support Docs CAD Files

This design or build includes CopperPour, LLC design work(s) shared Open Source under the CC BY-NC-SA 4.0 License

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18 Reviews

  • 5
    Interface cnc

    Posted by Jreese56 on Oct 26th 2021

    Best investment ever

  • 5
    The perfect companion for my LEAD

    Posted by Jose L Cuevas on Sep 8th 2021

    I just works, I was up and running in no time. All the core functionality without the need for a computer. You can figure out how to use it without reading a manual, is simple and intuitive.

  • 5

    Posted by Mr Martyn Booth on Apr 27th 2021

    i purchase this from the uk and ive found openbuilds support nothing short of amazing they are always keen to help with any issues i had. I have used this a fair few times now and i have found it great to use, i find it much more convenient than using my pc, i can set the interface going and use my pc to do other things also the interface doesnt go asleep like my pc mid cut. I am looking foward to future updates and future features to come.

  • 5
    Nicely Done

    Posted by Wayne Pennington on Apr 15th 2021

    The Interface works great and looks great. I'm using it on my homegrown, part Openbuilds, part Frankenstein router/plasma cutter CNC. It's fully functional, brightly lit, easy to read and understand, super-fast install, and helps make my DIY CNC look much more professional. Given its "Blackbox" size, it's easy to tuck away when a job is running so as to not get trashed when havoc breaks out on my machine. There was only one minor install issue. The "TVS Module" was about 2mm too tall for the Blackbox 2.7. I just kept the lid loose for now so as not to strain anything. Overall, I'm super pleased with it and I think it's quite a bargain for what it accomplishes.

  • 5
    Complete PC less cnc experience

    Posted by Fathmi Jahan on Apr 14th 2021

    It's ability to work without a laptop, probing, jogging, speed changing, even ability to transfer files to connected usb from pc over intranet everything is mind-blowing. It's a huge package in one small smaIl box. I believe was one of the first few customers of this device. All initial hiccups are fixed so far with superb customer service who doesn't sleep at all. Still enjoying it till date.

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