Model Variants

• HMK-3993-02: Keypad PCB + membrane (common)

• HMK-3993-04: CNC keyboard assembly

• HMK-3993-09: Membrane keypad (overlay)

• HMK-3993-11 / -12 / -18: Revisions for specific machine models

Manufacturer & Application

• Brand: Yaskawa Electric (Yasnac)

• Product Type: CNC Operator Panel / HMI Keypad

• Compatibility: Legacy Yasnac CNC systems (e.g., J Series, L Series)

• Industry: CNC machining, milling, turning, automation (1990s–2000s)

Technical Specifications

Electrical

• Interface: Membrane switch / matrix keyboard

• Logic Voltage: 5 VDC (controller side)

• Current: <100 mA

• Connection: Flat cable / ribbon connector to CNC mainboard

Mechanical & Environmental

• Construction: Polyester membrane + silicone keys + PCB

• Dimensions (approx.): 220 mm × 150 mm × 20 mm

• Weight: ~0.5 kg

• Operating Temp: 0 °C to +50 °C

• Humidity: 10%–85% RH (non‑condensing)

• Lifespan: >1 million key presses (typical)

Core Functions

1. Manual Data Input (MDI): Numeric/alphabetic keys for G‑code, M‑code, and parameter entry.

2. Machine Control: Cycle Start, Cycle Stop, Emergency Stop, Mode Select (Auto/MDI/Jog).

3. Axis & Jog Control: Axis keys (+X, −X, +Y, −Y, etc.) and jog speed override.

4. Display Interface: Works with CNC CRT/LCD for status, alarms, and program display.

5. Safety: E‑stop and lockout keys integrated into the panel.

Compatibility Notes

• Fits Yasnac J300, J500, LX1, LX2 and similar legacy controllers.

• Not compatible with modern Yaskawa panels (e.g., YRC1000, NXC100).

• Often sold as refurbished / used; new old stock (NOS) limited.

Maintenance & Replacement

• Common Failures: Worn membrane, non‑responsive keys, torn flex cable.

• Cleaning: Use mild detergent; avoid harsh solvents (damages membrane).

• Replacement: Direct swap with original HMK-3993 variant; no programming needed.

• Handling: ESD‑sensitive; use anti‑static gloves.