Description
📌 FANUC A20B‑3900‑0170 — Analog Spindle Module
A20B‑3900‑0166 (Example similar family part; exact A20B‑3900‑0170 may vary by seller)
Description:
The FANUC A20B‑3900‑0170 is an analog spindle interface/control module used in FANUC CNC control systems — particularly in Series 15i, 16i, 18i, and 21i (i‑Series) controllers. It provides the analog interface and control circuitry required for spindle speed/position feedback and control where analog signals (voltage/current) are used rather than digital or serial interfaces.
Key Functions & Features:
-
🔌 Analog Spindle Interface: Handles analog signals for spindle control, such as speed/position feedback from spindle encoders or converters.
-
📊 Controller Integration: Works with the CNC’s main control electronics (CPU, memory, servo modules) to integrate spindle control loops into the machine’s motion control system.
-
🛠️ Part of A20B‑3900 Series: Belongs to the broader A20B‑3900 family of analog/spindle and memory modules used in modular FANUC CNC electronics.
-
📍 Typical CNC Use: Found in the electronics rack of FANUC i‑Series controllers where the spindle needs an analog control interface.
Application:
Used when a CNC machine’s spindle drive or feedback system communicates via analog interfaces rather than digital/serial protocols, enabling accurate feedback and control for spindle motion in milling, turning, or multi‑axis machining applications.