Mach3-USB-CNC-Modbus-E-Cut-Expansion-Card-Breakout-Interface-Board-for-Engraving
waiting in the mail for this to arrive
was hoping to get this working with linuxcnc with a simple modbus usb adapter
http://www.netpipe.ca/zen/Electronics/CNC/
preliminary research might be one of these.
New CNC MACH3 6 Axis LPT Port MPG USB Card Motion Controller Adapter 200KHz
Item price C $57.69
was recognised by mach3 in virtualbox on windows 7 after putting the nc200 driver in the plugins folder.
was not usable / recognized on linux.
https://www.ebay.ca/itm/NVUM-6Axis-CNC-Controller-MACH3-Ethernet-Interface-Board-Card-Fr-Stepper-Motor/192184997215 looks interesting , 200 khz and it can be debugged over ethernet instead of the usb like another version of nvum interfacing.