This combo enables CNC via the USB port for Windows (only)
using the MACH3 or MACH4 software.
The Extended CNC controller box
contains signal drivers with Z state buffers that comply with the required IEEE
1284 type a signal level. It amplifies and therefore enhances the quality of the
step and direction signals from the parallel port and thus, rectifies weak
signal problems by delivering the proper signal level that any general purpose
four axis CNC controllers such as the Sherline’s 8760 requires. The latter
addresses often problems such as miss steps, single directional motion etc.
In addition, the extended box
enables to add limits/home switches a Digitizing probe an Emergency stop switch and has an
expansion port with additional buffered 4 outputs +V and ground.
All the inputs and outputs have
drivers for lower signal enhancement and furthermore, feature a high Z state for
a better isolation for the CNC controller and the operating computer. The limit
switches and the probe inputs pins are not used by the 8760 CNC controller and
therefore, are physically disconnected from it. They are also fully buffered to
protect the computer parallel printer inputs.
The unit comes with all the cables and accessories you need to connect swiftly
to the Sherline’s 8760 controller.
connect to the extended box via the RJ45 cable. The Switches get activated when
the moving project will touch them. They are relatively easy to mount onto the
LIMIT SWITCHS CONNECTOR
The Digitizing probe
is mounted to the spindle via its 3/8" Shank (Spindle
motor is off during the digitizing probe operation)
the probe cable connects via a jack connector to the extended box.
Various CNC software such as MACH3 and others have a probe wizard which
generates a three dimensional G code from the probe contacts. This probe can duplicate 3D objects with a reasonable
accuracy. Furthermore, the extended box can accommodate a more accurate (and
more pricy) probes available at the CNC market. Files being generated by the
wizard can also be imported to
a CAD software for fine tuning.
The expansion port
has an 4 additional outputs (Pins 1,14,16,17,+V and GND) that can control VFD CW/CCW
module for a variable spindle speed control as well as on/off relays.
The Emergency Stop
Switch connects to pin 10 (DB25P) and will activate the E-stop when
either the Red button is pushed or when the user pulls the Switch from the