67: Weihong Cnc Adaptor Pcimc 3d

| Feature | Specification | |--------|----------------| | Bus Interface | PCI 2.2 compliant, 32-bit, 33 MHz | | Control Axes | Up to 4 axes (3-axis standard, 4th optional via expansion) | | Output Signal | 5V differential TTL line driver (RS-422 compatible) | | Max Pulse Frequency | 500 kHz (typical, some variants up to 1 MHz) | | Encoder Input | Quadrature incremental encoder (A, B, Z) – 5V differential | | Digital I/O | 16 inputs (NPN/PNP selectable), 16 outputs (5V/24V open collector) | | Analog Output | 0–10V for spindle speed control | | External Connector | 68-pin SCSI-style female connector (often labeled CN1) | | Power Requirement | +5V from PCI bus, +24V external for I/O | | Operating Temperature | 0°C – 55°C |

Note: The “67” in the model refers to the 67-pin connector definition used in the mating cable, despite the physical connector often being 68-pin.

The adaptor serves as the central hub for the machine’s logic signals.

When machining complex 3D surfaces (e.g., molds, turbine blades, or artistic reliefs), the controller must look ahead hundreds of line segments. The PCIMC 3D 67 performs look-ahead processing onboard, preventing the "stuttering" motion common with software-only solutions.

The “3D” in PCIMC 3D 67 is not a marketing gimmick—the card has dedicated hardware for circular and helical interpolation. To maximize surface finish:

In the world of computer numerical control (CNC) machining, the reliability and precision of the motion control system are paramount. Weihong, a prominent Chinese manufacturer of CNC controllers, has long provided cost-effective solutions for routers, mills, lathes, and plasma cutters. Central to their PCI-bus control system is the PCIMC-3D-67 adaptor—a dedicated interface card that bridges the control software running on a standard PC with the drives, sensors, and actuators of a CNC machine.

This article provides a detailed technical overview, installation guidelines, common failure points, and troubleshooting advice for the Weihong PCIMC-3D-67 adaptor.

| Scenario | Action | | :--- | :--- | | Card won’t detect but PC is fine | Replace just the PCIMC card: $350-$450. | | Card detects but outputs erratic pulses | Try reflashing firmware (requires JTAG tool). If failed, replace. | | Whole control cabinet fried (lightning, coolant spill) | Move to Ethernet controller (e.g., RichAuto B57E) but plan 40 hours of re-wiring. | | You need 5-axis simultaneous | PCIMC 3D 67 cannot do 5-axis. Upgrade to Weihong NK300 (Ethernet, $2k+). |

To get the absolute best performance from your Weihong CNC Adaptor PCIMC 3D 67:

| Pin(s) | Signal | Description | |--------|--------|-------------| | 1-4 | X_STEP+, X_DIR+ | X-axis step/dir differential pair | | 5-8 | X_STEP-, X_DIR- | Complementary signals | | 9-12 | Y_STEP+, Y_DIR+ | Y-axis | | 13-16 | Y_STEP-, Y_DIR- | | | 29-32 | Z_STEP+, Z_DIR+ | Z-axis | | 33-36 | Z_STEP-, Z_DIR- | | | 43-44 | +24V_IN | External power for I/O | | 45-46 | GND | Power ground | | 47-58 | Input signals (IN1-IN12) | Limit switches, probe, etc. | | 59-64 | Output signals (OUT1-OUT6) | Spindle relay, coolant, etc. | | 65 | SPINDLE_ANALOG | 0–10V output | | 66-67 | Encoder Z+/- | Index pulse for spindle/axis |

Note: Full pinout depends on Weihong’s specific revision; always refer to the manual for your exact model.