VM Series Maintenance and Safety Manual 704-0212-209 Machine Components 1- 23
Main CPU Board
The main CPU board is a single board computer (SBC) with a microprocessor CPU. The
CPU board uses a passive backplane that provides both ISA and PCI buses. The SBC
contains the following AT-compatible peripherals:
• Hard disk interface
• Serial interface — COM1 and COM2 used for touchscreen interface
• Floppy disk interface (if equipped)
• USB 2.0 port (x4)
The interface for the hard disk is an integrated drive electronics (IDE) interface. It is
considered integrated because the hard disk controller resides on the drive itself and the
interface resides on the SBC. The connector for this interface is typically a dual row 40-
pin or 44-pin header.
VGA Board
The VGA board enables the CPU board to display text and graphics on the monitor. The
Dual VGA board (dual screen console) drives two monitors at once. The VGA board
connects to the CPU board via the PCI bus.
Watchdog Card
The Watchdog card is located in the CANbus controller. The watchdog card monitors the
refresh or “heartbeat” of the host SBC processor. Disables control power in the unlikely
event the heartbeat should stop.
Motion Control Hardware
The motion control subsystem consists of two major component types: the XMP/ZMP
motion processor and one or more Remote Motion Blocks (RMB). Each component is
connected in a token ring network topology using shielded CAT5e cables terminated with
RJ45 connectors (a.k.a. the SynqNet bus). The network complies with the 100Base-T
physical standard, but uses a deterministic full-duplex protocol called SynqNet to
communicate between the controller and its nodes. SynqNet is an open standard
developed by Motion Engineering, Inc.
The XMP/ZMP motion processor is a PCI card with an intelligent DSP controller that
accepts position/velocity/time commands from the CNC host computer, and sends
velocity commands digitally via the SynqNet bus. The Remote Motion Block then converts
the digital velocity command to an analog voltage compatible with the servo drive
velocity input. Conversely, the incremental position data from the axis encoders is
decoded by the RMB, and transmitted as an absolute position to the SynqNet bus. The
XMP/ZMP receives the position feedback and passes it to the host computer via PCI bus.
The XMP/ZMP uses the same position feedback in its fine interpolation algorithm to
determine its velocity command.
Each RMB supports four motors (command and feedback) and one encoder (feedback
only). Hurco machines use a single RMB for a 3-axis (XYZ and S) configuration.
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