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DYNAMIC RESEARCH CORP Encoder
Brand: DYNAMIC RESEARC CORP -
Code:25-S031-B15-1800G0C0
| Combination name | Availability | Price |
|---|---|---|
Incremental Optical Encoder – DYNAMICS RESEARCH CORP 25-S031-B15-1800G0C0
The 25-S031-B15-1800G0C0 is an incremental optical encoder manufactured by Dynamics Research Corp (DRC), with a resolution of 1800 lines/rev (CPR). The manufacturer part number identifies an encoder from the S031 series, flange/mounting configuration B15, and differential output configuration G0C0. The component is documented on a variety of CNC machine tools that use encoder feedback for linear axes or spindle. Other resolution and output variants exist within the same product family; this listing refers specifically to the 1800 CPR version.
The encoder is the position and velocity transducer that feeds the CNC controller with the feedback signal: it converts the mechanical rotation of the motor shaft into high-precision electrical pulses, enabling the position loop to correct axis trajectory or spindle speed in real time. Without the encoder signal the CNC is blind: the axis triggers a following error alarm or the spindle loses speed control, making any machining operation impossible.
Dynamics Research Corp (DRC) was a prominent US manufacturer (Wilmington, MA) specialising in precision optical encoders for machine tools, robotics, and industrial automation. The company was acquired by Danaher Corporation, and its encoder product lines were absorbed into the Dynapar brand. All original DRC series products are legacy / discontinued: supply relies entirely on used stock, surplus, or specialist repair services.
Main Technical Specifications
| Type | Incremental optical encoder |
| Part number | 25-S031-B15-1800G0C0 (25S031B151800G0C0) |
| Brand | Dynamics Research Corp – DRC (legacy Danaher / Dynapar) |
| Known application | CNC machine tools – linear axis / spindle feedback |
| Function | Rotational position and velocity transduction for CNC feedback loop |
| Resolution | 1800 CPR (lines/rev) – 7200 counts/rev in quadrature (x4) |
| Outputs | Differential RS-422 – channels A, /A, B, /B, Z, /Z (typical) |
| Supply voltage | 5 V DC ±5 % (typical) or 5–26 V DC (verify on label) |
| Interface / connector | Multi-pin connector or cable exit (C0 configuration) |
| Mounting | Servo-mount or face-mount flange (B15 configuration) |
| Weight | ~0.2–0.6 kg |
| Dimensions | Ø 60–90 mm, L 50–90 mm |
| Production status | Legacy / discontinued — used/surplus/repair only |
