A251A CNCUSB 4 Axis USB CNC Controller Alternative MACH3 USBCNC 2.1 http://www.ebay.it/itm/321133078386?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649&clk_rvr_id=1122121413661&rmvSB=true Specifications: 1.Works on MacOS X (Snow Leopard 10.6.3) with virtual machine emulating Windows XP SP3 2.USB (V2.x) from PC/Laptop running Windows XP, Vista or Windows 7 (32 bit or 64bit) 3.Motor driver connector pin-out is compatible with 10 pin open source interface (Linistepper, PICStep) 4.controller works with most step/dir stepper and servo motor drivers available on the market 5.buffered IO for maximum performance 6.advanced interpolation algorithms 7.start, stop, pause and resume execution of program on your machine 8.standard RS274/NGC G-code (EMC2 compatible) 9.advanced G-codes - G40, G41, G42 (Cutter Radius Compensation) supported 10.advanced G-codes - G43, G49 (Tool Length Offsets) supported 11.advanced G-codes - G54, G59.3 (Coordinate System Origins) supported 12.tested with SolidCAM, MasterCAM, ArtCAM, Vectric, CamBam, MeshCAM ... generated G-code 14.Profili 4-axes and 3-axes G-code supported 15. import toolpath from DXF files 16.import toolpath from PLT/HPGL files 17.import toolpath from image files 18.import toolpath from NC-Drill (Excellon) files 19.import toolpath from Gerber (RS-274X) files 20.toolpath simulation 21.automatic homing procedure 22.advanced toolchange procedures 23.automatic tool length measuring 24.export toolpath to G-code 25.export toolpath to DXF 26.SDK (software developers kit) is available 27.25 kHz maximum step frequency 28.3 digital outputs (flood, mist, spindle) 29.12 us minimum pulse width 30.manual jog inputs for all axes 31.limit inputs for all axes 32.control external devices with I2C protocol Pls pay attention to our title: "Alternative MACH3", it means it can replace MACH3, has the function of it, then it will not work with MACH3. Package List: 1 * 4 Axis USBCNC 2.1 Substitute MACH3 Interface Board 1 * USB 2.1 Cable If you have not registered, it can only use the software in August 2012.(DOWNLOAD)