Schematics¶
Spindle Controller¶
System Identification
Reference the System Identification page to determine the spindle type, model revision, and VFD ID of your Plug and Play Spindle / VFD System.
| Spindle Type | Model Revision | VFD ID | Schematic |
|---|---|---|---|
| Avid CNC 3 HP | 20.1.X | All | [PDF] |
| Avid CNC 4 HP Avid CNC AV40S | 20.1.X | A1 | [PDF] |
| 24.1.1 | B1 | [PDF] | |
| 24.3.0 | B1 | [PDF] | |
| Avid CNC 8.7 HP Avid CNC AV70S | 20.2.X | All | [PDF] |
| 21.1.X | All | [PDF] | |
| 21.2.X | All | [PDF] | |
| 22.1.X | E1 | [PDF] | |
| 22.2.X | C1, C2 | [PDF] | |
| D1, D2 | [PDF] | ||
| E1 | [PDF] | ||
| F1 | [PDF] | ||
| 24.3.0 | C1, C2 | [PDF] | |
| D1, D2 | [PDF] | ||
| E1 | [PDF] | ||
| F1 | [PDF] |
Common Connector Pinouts¶
14-pin Control Cable¶
| FEMALE connector | MALE connector |
Application
Unused pins are reserved for Plasma connections.
| Connector Pin # | Use | In / Out | Description | Color |
|---|---|---|---|---|
| 1 | Spindle | Digital In | Fault Ground | Blue |
| 2 | Spindle | Digital In | Fault Signal | White |
| 7 | Spindle | Digital Out | FWD | Orange |
| 8 | Spindle | Digital Out | DCM | Green |
| 9 | Spindle | Analog Out | AVI | Red |
| 10 | Spindle | Analog Out | ACM | Black |
| 11 | Spindle | (optional) Analog | 10V Ref | Blue/White |
M23 6P¶
Application
For use with Avid CNC 3 HP, 4 HP and AV40S spindles.
| FEMALE connector | MALE connector |
| Connector Pin # | Description |
|---|---|
| 1 | Thermal Switch |
| 2 | Thermal Switch |
| 3 | GND |
| 4 | U |
| 5 | V |
| 6 | W |
M23 8P¶
Application
For use with Avid CNC AV70S and 8.7 HP spindles.
| FEMALE connector | MALE connector |
| Connector Pin # | Description |
|---|---|
| 1 | U |
| 2 | GND |
| 3 | W |
| 4 | V |
| A | +24V Fan |
| B | Thermal Switch |
| C | 0V Fan |
| D | Thermal Switch |
M12 8P¶
Application
For use with Avid CNC AV70S and AV40S spindles.
![]() | ![]() |
| FEMALE connector | MALE connector |
| Connector Pin # | Spindle In / Out | Description | Notes |
|---|---|---|---|
| 1 | In | ATC - Drawbar actuate command | N.O., Sourcing. Close to release the tool. |
| 2 | In | 24V+ | |
| 3 | Out | ATC - Drawbar Up (closed) signal | N.O., Sinking. Closed while the drawbar is in the Up/Closed position. |
| 4 | Out | ATC - Drawbar Down (open) signal | N.O., Sinking. Closed while the drawbar is in the Down/Open position. |
| 5 | Out | ATC - MTC button pressed signal | N.O., Sinking. Closed while the MTC button is pressed. |
| 6 | Out | ATC - Spindle Stopped signal | N.O., Sinking. Closed while the spindle tachometer reads below 250 RPM. |
| 7 | In | Ground (24V-) | |
| 8 | In | ATC - Drawbar Inhibit command | N.O., Sourcing. Close to prevent all drawbar actuation. |
Note
When the Drawbar Up and Drawbar Down signals are both Open/Off, this indicates that a tool holder is successfully loaded in the spindle.

