To the best of my knowledge, the Ryxon KT332N controller started shipping this year, and is only used on one CO2 laser engraver model as of this writing. (Note: there appear to be multiple model numbers for the same machine, some of them of which are known as Preenex Aoshen USB-6B57, USB570-60W, USB-320S-BW, USB-6R57-US all of which are 60W, 28x20, with motorized Z-axis and Autofocus.) According to the manufacturer, the KT332N is made by Ruida and is based on the Ruida 6442. LightBurn recognizes it as a Ruida 644XG.
The Ryxon panel has extra buttons, such as Aux Air, Focus, dedicated buttons for Z axis, continuous/momentary Up and Down, and a separate Menu button, which are a nice improvement over the 6442. Oddly, they removed the Min and Max Speed buttons,
On the controller side, the KT332N is a little more stripped down, but nothing that the typical user would miss. The most noticeable is that it has connectors for only three axes (versus four on the 6442) and it does not have a connector for a second laser tube. The KT332N has an X, Y and U axis. The U-axis is used for the rotary, in comparison to the 6442 which uses the Z-axis for the rotary and the U-axis for the seldom used conveyor control. The KT332N also lacks status LEDs. Lastly, the limit switches have been combined onto a single connector. The KT332N does have ethernet, although it is not labeled.
Attached are two photos for reference.
