A Mori Seiki SL-1 lathe equipped with a Fanuc 6T control is missing its spindle drive. The remaining wire-connection information identifies only EP-1845B, described in the available evidence as a board number that may be associated with Fuji. Do not treat that board number as the complete spindle-drive model.
Separate Confirmed Facts From the Drive Hypothesis
| Item | Status | Engineering implication |
|---|---|---|
| Machine | Mori Seiki SL-1 CNC lathe | Use this identity when requesting machine electrical documentation. |
| Control | Fanuc 6T | This identifies the CNC control, not necessarily the removed spindle drive. |
| Missing hardware | Spindle drive | The machine cannot be restored from a board reference alone. |
| Recorded identifier | EP-1845B |
Reported as a board number; the complete drive manufacturer and model remain unconfirmed. |
| Possible manufacturer | Fuji | Treat this only as a search hypothesis until documentation or matching hardware confirms it. |
Identify the Removed Spindle Drive
Preserve the surviving connection notes exactly, including terminal labels, wire numbers, connector designations, and cable destinations. Compare those records with the machine electrical manual and clear photographs of an intact SL-1 installation. A valid match must reconcile the complete connector and terminal arrangement; similarity to EP-1845B alone is insufficient.
- Request the Mori Seiki SL-1 electrical manual and spindle-system documentation using both the machine model and Fanuc 6T control designation.
- Search documentation for
EP-1845Bas a board identifier, not as an assumed drive model. - Obtain photographs of the complete spindle-drive assembly, including its external nameplate, installed boards, connectors, and terminal markings.
- Accept a candidate drive only after its documented interfaces match every retained connection record.
Information Still Required Before Replacement
The evidence does not provide the spindle-drive model, spindle-motor data, supply requirements, command interface, feedback interface, or ratings. Do not select or energize a replacement until these unknowns are resolved from machine documentation, motor and component nameplates, or a verified intact installation. The fact that the rest of the machine appears to work does not establish spindle-system compatibility.
Verify the Identification
Record the candidate drive manufacturer, complete model, assembly identifiers, and installed board identifiers. Then cross-check every retained wire and connector against the candidate documentation. Identification is complete only when the machine drawings, physical interfaces, and drive assembly agree without unexplained terminals or substituted assumptions.
FAQ
Is EP-1845B the spindle-drive model for a Mori Seiki SL-1?
No. The available evidence identifies EP-1845B only as a board number, so it cannot by itself specify the complete spindle drive.
Does a Fanuc 6T control prove that the spindle drive is Fanuc?
No. Fanuc 6T identifies the CNC control in this machine; the removed spindle-drive manufacturer and model remain unconfirmed.
What must match before installing a replacement spindle drive?
Confirm the complete drive identity and reconcile its documented connectors, terminals, command interface, feedback interface, and required ratings with the SL-1 documentation and retained wiring records.
