Hardware and Electronic for Motion Control and CNC
It is a standard Arduino Nano clone with smaller bootloader and Grbl v1.1 firmware installed.
To help out people who are not comfortable doing this themselves. This might save you some time and frustration. With that said, you could easily do it yourself by following my instructions here.
Installing Grbl with CoreXY on a Nano is difficult. It won't fit with the normal Nano bootloader. This Nano uses the Arduino Uno bootloader. The Uno bootloader works fine on a Nano and is one third the size.
CoreXY is a special type of mechanism that uses 2 motors on a single belt to to control 2 axes. The CoreXY features can also run 'H' and 'T' style machines. You can read more about these machines on this blog post.
This Nanos is a clone and not original Arduino product, but they do use the FTDI USB Chip. This USB driver typically installs with the Arduino IDE. This makes the controller more expensive than the cheapest clones you can find.
Important Note: When you use this 'Nano', you will pick Arduino/Genuino Uno from the boards manager. The IDE must treat it as an Uno. The boards will ship with an 'Uno' sticker on them as a reminder.
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I have been doing DIY Open Source CNC for almost 20 years.