diff --git a/electron/src/machines/winder/gluetex/GluetexAddonsPage.tsx b/electron/src/machines/winder/gluetex/GluetexAddonsPage.tsx
index dd70fd6f..4a094c5f 100644
--- a/electron/src/machines/winder/gluetex/GluetexAddonsPage.tsx
+++ b/electron/src/machines/winder/gluetex/GluetexAddonsPage.tsx
@@ -25,9 +25,8 @@ export function GluetexAddonsPage() {
     defaultState,
     isLoading,
     isDisabled,
-    setStepper2Mode,
-    setStepper34Mode,
-    setCuttingUnitMode,
+    setStepper3Mode,
+    setStepper4Mode,
     setHeatingMode,
     temperature1,
     temperature2,
@@ -53,12 +52,12 @@ export function GluetexAddonsPage() {
     <Page>
       <ControlGrid>
         <ControlCard className="bg-red" title="Motors">
-          <Label label="Stepper 2">
+          <Label label="Stepper 3">
             <SelectionGroup<StepperMode>
-              value={state?.stepper_state?.stepper2_mode}
+              value={state?.stepper_state?.stepper3_mode}
               disabled={isDisabled}
               loading={isLoading}
-              onChange={setStepper2Mode}
+              onChange={setStepper3Mode}
               orientation="horizontal"
               className="grid grid-cols-2 gap-2"
               options={{
@@ -75,34 +74,12 @@ export function GluetexAddonsPage() {
               }}
             />
           </Label>
-          <Label label="Stepper 3&4">
+          <Label label="Stepper 4">
             <SelectionGroup<StepperMode>
-              value={state?.stepper_state?.stepper34_mode}
+              value={state?.stepper_state?.stepper4_mode}
               disabled={isDisabled}
               loading={isLoading}
-              onChange={setStepper34Mode}
-              orientation="horizontal"
-              className="grid grid-cols-2 gap-2"
-              options={{
-                Standby: {
-                  children: "Standby",
-                  icon: "lu:Power",
-                  isActiveClassName: "bg-green-600",
-                },
-                Run: {
-                  children: "Run",
-                  icon: "lu:Play",
-                  isActiveClassName: "bg-green-600",
-                },
-              }}
-            />
-          </Label>
-          <Label label="Cutting Unit">
-            <SelectionGroup<StepperMode>
-              value={state?.stepper_state?.cutting_unit_mode}
-              disabled={isDisabled}
-              loading={isLoading}
-              onChange={setCuttingUnitMode}
+              onChange={setStepper4Mode}
               orientation="horizontal"
               className="grid grid-cols-2 gap-2"
               options={{
diff --git a/electron/src/machines/winder/gluetex/gluetexNamespace.ts b/electron/src/machines/winder/gluetex/gluetexNamespace.ts
index 00e8c6a4..dcb4a929 100644
--- a/electron/src/machines/winder/gluetex/gluetexNamespace.ts
+++ b/electron/src/machines/winder/gluetex/gluetexNamespace.ts
@@ -213,6 +213,15 @@ export const heatingStatesSchema = z.object({
   zone_6: heatingStateSchema,
 });
 
+/**
+ * Addon motor state schema (from backend)
+ */
+export const addonMotorStateSchema = z.object({
+  enabled: z.boolean(),
+  master_ratio: z.number(),
+  slave_ratio: z.number(),
+});
+
 /**
  * Consolidated state event schema (state changes only) - from backend
  */
@@ -226,6 +235,8 @@ export const stateEventDataSchema = z.object({
   spool_automatic_action_state: spoolAutomaticActionStateSchema,
   heating_states: heatingStatesSchema,
   connected_machine_state: connectedMachineStateSchema,
+  addon_motor_3_state: addonMotorStateSchema,
+  addon_motor_4_state: addonMotorStateSchema,
 });
 
 // ========== Event Schemas with Wrappers ==========
@@ -253,11 +264,34 @@ export type MotorRatiosState = {
 };
 
 export type StepperState = {
-  stepper2_mode: StepperMode;
-  stepper34_mode: StepperMode;
-  cutting_unit_mode: StepperMode;
+  stepper3_mode: StepperMode;
+  stepper4_mode: StepperMode;
 };
 
+/**
+ * Helper to convert backend addon motor state to frontend MotorRatiosState
+ */
+function getMotorRatiosFromBackend(
+  motor3: z.infer<typeof addonMotorStateSchema>,
+  motor4: z.infer<typeof addonMotorStateSchema>,
+): MotorRatiosState {
+  return {
+    stepper3_master: motor3.master_ratio,
+    stepper3_slave: motor3.slave_ratio,
+    stepper4_master: motor4.master_ratio,
+    stepper4_slave: motor4.slave_ratio,
+  };
+}
+
+/**
+ * Helper to determine stepper4 mode from backend enabled state
+ */
+function getStepper4ModeFromBackend(
+  motor4: z.infer<typeof addonMotorStateSchema>,
+): StepperMode {
+  return motor4.enabled ? "Run" : "Standby";
+}
+
 export type HeatingState = {
   heating_mode: HeatingMode;
 };
@@ -388,9 +422,8 @@ const DEFAULT_ADDON_STATE = {
     stepper4_slave: 1.0,
   },
   stepper_state: {
-    stepper2_mode: "Standby" as StepperMode,
-    stepper34_mode: "Standby" as StepperMode,
-    cutting_unit_mode: "Standby" as StepperMode,
+    stepper3_mode: "Standby" as StepperMode,
+    stepper4_mode: "Standby" as StepperMode,
   },
   heating_state: {
     heating_mode: "Standby" as HeatingMode,
@@ -472,19 +505,32 @@ export function gluetexMessageHandler(
         const stateEvent = stateEventSchema.parse(event);
 
         updateStore((state) => {
-          // Extend backend state with addon state
+          // Derive motor ratios from backend addon motor state
+          const motorRatiosState = getMotorRatiosFromBackend(
+            stateEvent.data.addon_motor_3_state,
+            stateEvent.data.addon_motor_4_state,
+          );
+
+          // Derive stepper4 mode from backend enabled state
+          const stepper4Mode = getStepper4ModeFromBackend(
+            stateEvent.data.addon_motor_4_state,
+          );
+
+          // Extend backend state with addon state (some local, some derived from backend)
           const extendedData: ExtendedStateEventData = {
             ...stateEvent.data,
-            // Preserve existing addon state or use defaults
+            // Preserve existing local-only addon state
             slave_puller_state:
               state.state?.data.slave_puller_state ||
               DEFAULT_ADDON_STATE.slave_puller_state,
-            motor_ratios_state:
-              state.state?.data.motor_ratios_state ||
-              DEFAULT_ADDON_STATE.motor_ratios_state,
-            stepper_state:
-              state.state?.data.stepper_state ||
-              DEFAULT_ADDON_STATE.stepper_state,
+            // Derive from backend addon motor state
+            motor_ratios_state: motorRatiosState,
+            stepper_state: {
+              stepper3_mode:
+                state.state?.data.stepper_state.stepper3_mode ||
+                DEFAULT_ADDON_STATE.stepper_state.stepper3_mode,
+              stepper4_mode: stepper4Mode,
+            },
             heating_state:
               state.state?.data.heating_state ||
               DEFAULT_ADDON_STATE.heating_state,
diff --git a/electron/src/machines/winder/gluetex/useGluetex.ts b/electron/src/machines/winder/gluetex/useGluetex.ts
index 77904d67..8e86100a 100644
--- a/electron/src/machines/winder/gluetex/useGluetex.ts
+++ b/electron/src/machines/winder/gluetex/useGluetex.ts
@@ -178,6 +178,28 @@ export function useGluetex() {
     }),
   );
 
+  // Addon Motor 3 mutations
+  const { request: requestAddonMotor3SetEnabled } = useMachineMutation(
+    z.object({ SetAddonMotor3Enabled: z.boolean() }),
+  );
+  const { request: requestAddonMotor3SetMasterRatio } = useMachineMutation(
+    z.object({ SetAddonMotor3MasterRatio: z.number() }),
+  );
+  const { request: requestAddonMotor3SetSlaveRatio } = useMachineMutation(
+    z.object({ SetAddonMotor3SlaveRatio: z.number() }),
+  );
+
+  // Addon Motor 4 mutations
+  const { request: requestAddonMotor4SetEnabled } = useMachineMutation(
+    z.object({ SetAddonMotor4Enabled: z.boolean() }),
+  );
+  const { request: requestAddonMotor4SetMasterRatio } = useMachineMutation(
+    z.object({ SetAddonMotor4MasterRatio: z.number() }),
+  );
+  const { request: requestAddonMotor4SetSlaveRatio } = useMachineMutation(
+    z.object({ SetAddonMotor4SlaveRatio: z.number() }),
+  );
+
   // ========== Helper Functions ==========
 
   // Helper function for optimistic updates using produce
@@ -596,22 +618,25 @@ export function useGluetex() {
 
   // ========== Action Functions (Addon Features - Local Only) ==========
 
-  const setStepper2Mode = (mode: StepperMode) => {
+  const setStepper3Mode = (mode: StepperMode) => {
     updateStateLocally((current) => {
-      current.data.stepper_state.stepper2_mode = mode;
+      current.data.stepper_state.stepper3_mode = mode;
     });
   };
 
-  const setStepper34Mode = (mode: StepperMode) => {
-    updateStateLocally((current) => {
-      current.data.stepper_state.stepper34_mode = mode;
-    });
-  };
-
-  const setCuttingUnitMode = (mode: StepperMode) => {
-    updateStateLocally((current) => {
-      current.data.stepper_state.cutting_unit_mode = mode;
-    });
+  const setStepper4Mode = (mode: StepperMode) => {
+    const enabled = mode === "Run";
+    updateStateOptimistically(
+      (current) => {
+        current.data.stepper_state.stepper4_mode = mode;
+      },
+      () => {
+        requestAddonMotor4SetEnabled({
+          machine_identification_unique: machineIdentification,
+          data: { SetAddonMotor4Enabled: enabled },
+        });
+      },
+    );
   };
 
   const setHeatingMode = (mode: HeatingMode) => {
@@ -645,27 +670,55 @@ export function useGluetex() {
   };
 
   const setStepper3Master = (value: number) => {
-    updateStateLocally((current) => {
-      current.data.motor_ratios_state.stepper3_master = value;
-    });
+    updateStateOptimistically(
+      (current) => {
+        current.data.motor_ratios_state.stepper3_master = value;
+      },
+      () =>
+        requestAddonMotor3SetMasterRatio({
+          machine_identification_unique: machineIdentification,
+          data: { SetAddonMotor3MasterRatio: value },
+        }),
+    );
   };
 
   const setStepper3Slave = (value: number) => {
-    updateStateLocally((current) => {
-      current.data.motor_ratios_state.stepper3_slave = value;
-    });
+    updateStateOptimistically(
+      (current) => {
+        current.data.motor_ratios_state.stepper3_slave = value;
+      },
+      () =>
+        requestAddonMotor3SetSlaveRatio({
+          machine_identification_unique: machineIdentification,
+          data: { SetAddonMotor3SlaveRatio: value },
+        }),
+    );
   };
 
   const setStepper4Master = (value: number) => {
-    updateStateLocally((current) => {
-      current.data.motor_ratios_state.stepper4_master = value;
-    });
+    updateStateOptimistically(
+      (current) => {
+        current.data.motor_ratios_state.stepper4_master = value;
+      },
+      () =>
+        requestAddonMotor4SetMasterRatio({
+          machine_identification_unique: machineIdentification,
+          data: { SetAddonMotor4MasterRatio: value },
+        }),
+    );
   };
 
   const setStepper4Slave = (value: number) => {
-    updateStateLocally((current) => {
-      current.data.motor_ratios_state.stepper4_slave = value;
-    });
+    updateStateOptimistically(
+      (current) => {
+        current.data.motor_ratios_state.stepper4_slave = value;
+      },
+      () =>
+        requestAddonMotor4SetSlaveRatio({
+          machine_identification_unique: machineIdentification,
+          data: { SetAddonMotor4SlaveRatio: value },
+        }),
+    );
   };
 
   // ========== Machine Filtering ==========
@@ -767,9 +820,8 @@ export function useGluetex() {
     disconnectMachine,
 
     // Addon action functions (local only)
-    setStepper2Mode,
-    setStepper34Mode,
-    setCuttingUnitMode,
+    setStepper3Mode,
+    setStepper4Mode,
     setHeatingMode,
     setTemperature1Min,
     setTemperature1Max,
diff --git a/machines/src/gluetex/act.rs b/machines/src/gluetex/act.rs
index 91076d8b..b56748b6 100644
--- a/machines/src/gluetex/act.rs
+++ b/machines/src/gluetex/act.rs
@@ -15,6 +15,10 @@ impl MachineAct for Gluetex {
         // sync the puller speed
         self.sync_puller_speed(now);
 
+        // sync addon motor speeds
+        self.sync_addon_motor_3_speed(now);
+        self.sync_addon_motor_4_speed(now);
+
         // sync the traverse speed
         self.sync_traverse_speed();
 
diff --git a/machines/src/gluetex/addon_motor_controller.rs b/machines/src/gluetex/addon_motor_controller.rs
new file mode 100644
index 00000000..d4bd527c
--- /dev/null
+++ b/machines/src/gluetex/addon_motor_controller.rs
@@ -0,0 +1,221 @@
+use control_core::converters::angular_step_converter::AngularStepConverter;
+use ethercat_hal::io::stepper_velocity_el70x1::StepperVelocityEL70x1;
+use units::angular_velocity::revolution_per_second;
+use units::f64::AngularVelocity;
+
+/// Controller for addon motors that follow the puller speed with a configurable ratio
+#[derive(Debug)]
+pub struct AddonMotorController {
+    /// Whether the motor is enabled (Run mode)
+    enabled: bool,
+    /// Master ratio value (e.g., 2 in "2:1")
+    master_ratio: f64,
+    /// Slave ratio value (e.g., 1 in "2:1")
+    slave_ratio: f64,
+    /// Converter for angular velocity to steps
+    converter: AngularStepConverter,
+}
+
+impl AddonMotorController {
+    /// Create a new addon motor controller
+    ///
+    /// # Arguments
+    /// * `steps_per_revolution` - Number of steps per revolution for the stepper motor
+    pub fn new(steps_per_revolution: i16) -> Self {
+        Self {
+            enabled: false,
+            master_ratio: 1.0,
+            slave_ratio: 1.0,
+            converter: AngularStepConverter::new(steps_per_revolution),
+        }
+    }
+
+    /// Set whether the motor is enabled (Run mode)
+    pub fn set_enabled(&mut self, enabled: bool) {
+        self.enabled = enabled;
+    }
+
+    /// Get whether the motor is enabled
+    pub const fn is_enabled(&self) -> bool {
+        self.enabled
+    }
+
+    /// Set the master ratio value
+    ///
+    /// The master ratio represents the puller rotations in the ratio.
+    /// For example, in a 2:1 ratio, the master is 2.
+    pub fn set_master_ratio(&mut self, master: f64) {
+        self.master_ratio = master.max(0.1); // Prevent division issues
+    }
+
+    /// Set the slave ratio value
+    ///
+    /// The slave ratio represents the motor rotations in the ratio.
+    /// For example, in a 2:1 ratio, the slave is 1.
+    pub fn set_slave_ratio(&mut self, slave: f64) {
+        self.slave_ratio = slave.max(0.1); // Prevent division issues
+    }
+
+    /// Get the master ratio value
+    pub const fn get_master_ratio(&self) -> f64 {
+        self.master_ratio
+    }
+
+    /// Get the slave ratio value
+    pub const fn get_slave_ratio(&self) -> f64 {
+        self.slave_ratio
+    }
+
+    /// Calculate the motor angular velocity based on puller angular velocity and ratio
+    ///
+    /// # Arguments
+    /// * `puller_angular_velocity` - The current angular velocity of the puller
+    ///
+    /// # Returns
+    /// The angular velocity this motor should run at
+    ///
+    /// # Example
+    /// If puller is rotating at 10 rev/s and ratio is 2:1 (master=2, slave=1),
+    /// then motor should rotate at 5 rev/s (10 * 1/2)
+    fn calculate_motor_velocity(
+        &self,
+        puller_angular_velocity: AngularVelocity,
+    ) -> AngularVelocity {
+        if !self.enabled {
+            return AngularVelocity::new::<revolution_per_second>(0.0);
+        }
+
+        // Motor velocity = puller velocity * (slave_ratio / master_ratio)
+        // For 2:1, motor rotates at half the puller speed (1/2)
+        // For 1:2, motor rotates at twice the puller speed (2/1)
+        let ratio = self.slave_ratio / self.master_ratio;
+        puller_angular_velocity * ratio
+    }
+
+    /// Update the motor speed based on the puller angular velocity
+    ///
+    /// # Arguments
+    /// * `motor` - The stepper motor to control
+    /// * `puller_angular_velocity` - The current angular velocity of the puller
+    pub fn sync_motor_speed(
+        &self,
+        motor: &mut StepperVelocityEL70x1,
+        puller_angular_velocity: AngularVelocity,
+    ) {
+        if !self.enabled {
+            // If disabled, ensure motor is not enabled
+            if motor.is_enabled() {
+                motor.set_enabled(false);
+            }
+            return;
+        }
+
+        // Enable motor if not already enabled
+        if !motor.is_enabled() {
+            motor.set_enabled(true);
+        }
+
+        // Calculate target velocity
+        let target_velocity = self.calculate_motor_velocity(puller_angular_velocity);
+
+        // Convert to steps per second and set motor speed
+        let steps_per_second = self.converter.angular_velocity_to_steps(target_velocity);
+        let _ = motor.set_speed(steps_per_second);
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use units::angular_velocity::revolution_per_second;
+
+    #[test]
+    fn test_addon_motor_controller_disabled() {
+        let controller = AddonMotorController::new(200);
+        let puller_velocity = AngularVelocity::new::<revolution_per_second>(10.0);
+
+        let motor_velocity = controller.calculate_motor_velocity(puller_velocity);
+
+        assert_eq!(
+            motor_velocity.get::<revolution_per_second>(),
+            0.0,
+            "Motor should be stopped when disabled"
+        );
+    }
+
+    #[test]
+    fn test_addon_motor_controller_ratio_2_to_1() {
+        let mut controller = AddonMotorController::new(200);
+        controller.set_enabled(true);
+        controller.set_master_ratio(2.0);
+        controller.set_slave_ratio(1.0);
+
+        let puller_velocity = AngularVelocity::new::<revolution_per_second>(10.0);
+        let motor_velocity = controller.calculate_motor_velocity(puller_velocity);
+
+        // For every 2 puller rotations, motor should rotate 1 time
+        // So motor speed should be half of puller speed
+        assert_eq!(
+            motor_velocity.get::<revolution_per_second>(),
+            5.0,
+            "Motor should run at half speed with 2:1 ratio"
+        );
+    }
+
+    #[test]
+    fn test_addon_motor_controller_ratio_1_to_2() {
+        let mut controller = AddonMotorController::new(200);
+        controller.set_enabled(true);
+        controller.set_master_ratio(1.0);
+        controller.set_slave_ratio(2.0);
+
+        let puller_velocity = AngularVelocity::new::<revolution_per_second>(10.0);
+        let motor_velocity = controller.calculate_motor_velocity(puller_velocity);
+
+        // For every 1 puller rotation, motor should rotate 2 times
+        // So motor speed should be twice the puller speed
+        assert_eq!(
+            motor_velocity.get::<revolution_per_second>(),
+            20.0,
+            "Motor should run at twice speed with 1:2 ratio"
+        );
+    }
+
+    #[test]
+    fn test_addon_motor_controller_ratio_3_to_2() {
+        let mut controller = AddonMotorController::new(200);
+        controller.set_enabled(true);
+        controller.set_master_ratio(3.0);
+        controller.set_slave_ratio(2.0);
+
+        let puller_velocity = AngularVelocity::new::<revolution_per_second>(9.0);
+        let motor_velocity = controller.calculate_motor_velocity(puller_velocity);
+
+        // For every 3 puller rotations, motor should rotate 2 times
+        // So motor speed should be 2/3 of puller speed
+        // 9 * (2/3) = 6.0
+        assert_eq!(
+            motor_velocity.get::<revolution_per_second>(),
+            6.0,
+            "Motor should run at 2/3 speed with 3:2 ratio"
+        );
+    }
+
+    #[test]
+    fn test_addon_motor_controller_ratio_1_to_1() {
+        let mut controller = AddonMotorController::new(200);
+        controller.set_enabled(true);
+        controller.set_master_ratio(1.0);
+        controller.set_slave_ratio(1.0);
+
+        let puller_velocity = AngularVelocity::new::<revolution_per_second>(10.0);
+        let motor_velocity = controller.calculate_motor_velocity(puller_velocity);
+
+        // 1:1 ratio means motor runs at same speed as puller
+        assert_eq!(
+            motor_velocity.get::<revolution_per_second>(),
+            10.0,
+            "Motor should run at same speed with 1:1 ratio"
+        );
+    }
+}
diff --git a/machines/src/gluetex/api.rs b/machines/src/gluetex/api.rs
index 6af80e40..96393e9d 100644
--- a/machines/src/gluetex/api.rs
+++ b/machines/src/gluetex/api.rs
@@ -133,6 +133,14 @@ pub enum Mutation {
 
     // Disconnect Machine
     DisconnectMachine(MachineIdentificationUnique),
+
+    // Addon Motors
+    SetAddonMotor3Enabled(bool),
+    SetAddonMotor4Enabled(bool),
+    SetAddonMotor3MasterRatio(f64),
+    SetAddonMotor3SlaveRatio(f64),
+    SetAddonMotor4MasterRatio(f64),
+    SetAddonMotor4SlaveRatio(f64),
 }
 
 #[derive(Serialize, Debug, Clone, Default)]
@@ -198,6 +206,10 @@ pub struct StateEvent {
     pub heating_states: HeatingStates,
     /// Is a Machine Connected?
     pub connected_machine_state: MachineCrossConnectionState,
+    /// addon motor 3 state
+    pub addon_motor_3_state: AddonMotorState,
+    /// addon motor 4 state
+    pub addon_motor_4_state: AddonMotorState,
 }
 
 #[derive(Serialize, Debug, Clone, Default)]
@@ -298,6 +310,16 @@ pub struct SpoolSpeedControllerState {
     pub forward: bool,
 }
 
+#[derive(Serialize, Debug, Clone, Default)]
+pub struct AddonMotorState {
+    /// is motor enabled (running)
+    pub enabled: bool,
+    /// master ratio value (e.g., 2 in "2:1")
+    pub master_ratio: f64,
+    /// slave ratio value (e.g., 1 in "2:1")
+    pub slave_ratio: f64,
+}
+
 #[derive(Serialize, Debug, Clone, Default)]
 pub struct HeatingStates {
     pub zone_1: HeatingState,
@@ -435,6 +457,30 @@ impl MachineApi for Gluetex {
                 //main_sender.try_send(crate::AsyncThreadMessage::ConnectOneWayRequest(crate::CrossConnection { src: self.get_machine_identification_unique(), dest: machine_identification_unique }))?;
                 self.emit_state();
             }
+            Mutation::SetAddonMotor3Enabled(enabled) => {
+                self.addon_motor_3_controller.set_enabled(enabled);
+                self.emit_state();
+            }
+            Mutation::SetAddonMotor4Enabled(enabled) => {
+                self.addon_motor_4_controller.set_enabled(enabled);
+                self.emit_state();
+            }
+            Mutation::SetAddonMotor3MasterRatio(ratio) => {
+                self.addon_motor_3_controller.set_master_ratio(ratio);
+                self.emit_state();
+            }
+            Mutation::SetAddonMotor3SlaveRatio(ratio) => {
+                self.addon_motor_3_controller.set_slave_ratio(ratio);
+                self.emit_state();
+            }
+            Mutation::SetAddonMotor4MasterRatio(ratio) => {
+                self.addon_motor_4_controller.set_master_ratio(ratio);
+                self.emit_state();
+            }
+            Mutation::SetAddonMotor4SlaveRatio(ratio) => {
+                self.addon_motor_4_controller.set_slave_ratio(ratio);
+                self.emit_state();
+            }
         }
         Ok(())
     }
diff --git a/machines/src/gluetex/emit.rs b/machines/src/gluetex/emit.rs
index 88d0e08d..18988819 100644
--- a/machines/src/gluetex/emit.rs
+++ b/machines/src/gluetex/emit.rs
@@ -378,6 +378,16 @@ impl Gluetex {
                 },
             },
             connected_machine_state: cross_conn,
+            addon_motor_3_state: api::AddonMotorState {
+                enabled: self.addon_motor_3_controller.is_enabled(),
+                master_ratio: self.addon_motor_3_controller.get_master_ratio(),
+                slave_ratio: self.addon_motor_3_controller.get_slave_ratio(),
+            },
+            addon_motor_4_state: api::AddonMotorState {
+                enabled: self.addon_motor_4_controller.is_enabled(),
+                master_ratio: self.addon_motor_4_controller.get_master_ratio(),
+                slave_ratio: self.addon_motor_4_controller.get_slave_ratio(),
+            },
         }
     }
 
diff --git a/machines/src/gluetex/mod.rs b/machines/src/gluetex/mod.rs
index b1fe0beb..ab74facd 100644
--- a/machines/src/gluetex/mod.rs
+++ b/machines/src/gluetex/mod.rs
@@ -1,5 +1,6 @@
 pub mod act;
 pub mod adaptive_spool_speed_controller;
+pub mod addon_motor_controller;
 pub mod api;
 pub mod clamp_revolution;
 pub mod emit;
@@ -17,6 +18,7 @@ use units::f64::ThermodynamicTemperature;
 use units::thermodynamic_temperature::degree_celsius;
 
 mod gluetex_imports {
+    pub use super::addon_motor_controller::AddonMotorController;
     pub use super::api::GluetexNamespace;
     pub use super::api::SpoolAutomaticActionMode;
     pub use super::puller_speed_controller::PullerSpeedController;
@@ -118,10 +120,18 @@ pub struct Gluetex {
     pub tension_arm: TensionArm,
     pub laser: DigitalOutput,
 
+    // addon motors
+    pub addon_motor_3: StepperVelocityEL70x1,
+    pub addon_motor_4: StepperVelocityEL70x1,
+
     // controllers
     pub traverse_controller: TraverseController,
     pub traverse_end_stop: DigitalInput,
 
+    // addon motor controllers
+    pub addon_motor_3_controller: AddonMotorController,
+    pub addon_motor_4_controller: AddonMotorController,
+
     // temperature controllers (PID-controlled heaters with temperature sensors)
     pub temperature_controller_1: TemperatureController,
     pub temperature_controller_2: TemperatureController,
@@ -359,6 +369,22 @@ impl Gluetex {
             .angular_velocity_to_steps(angular_velocity);
         let _ = self.puller.set_speed(steps_per_second);
     }
+
+    /// Sync addon motor 3 speed based on puller angular velocity and ratio
+    /// called by `act`
+    pub fn sync_addon_motor_3_speed(&mut self, t: Instant) {
+        let puller_angular_velocity = self.puller_speed_controller.calc_angular_velocity(t);
+        self.addon_motor_3_controller
+            .sync_motor_speed(&mut self.addon_motor_3, puller_angular_velocity);
+    }
+
+    /// Sync addon motor 4 speed based on puller angular velocity and ratio
+    /// called by `act`
+    pub fn sync_addon_motor_4_speed(&mut self, t: Instant) {
+        let puller_angular_velocity = self.puller_speed_controller.calc_angular_velocity(t);
+        self.addon_motor_4_controller
+            .sync_motor_speed(&mut self.addon_motor_4, puller_angular_velocity);
+    }
 }
 
 #[derive(Debug, Clone, PartialEq, Eq)]
diff --git a/machines/src/gluetex/new.rs b/machines/src/gluetex/new.rs
index 873fdce2..908c29d4 100644
--- a/machines/src/gluetex/new.rs
+++ b/machines/src/gluetex/new.rs
@@ -230,6 +230,74 @@ impl MachineNewTrait for Gluetex {
                     .await?
                     .0;
 
+            // Role 9: Addon Motor 3 EL7031
+            let el7031_addon3 = {
+                let device = get_ethercat_device::<EL7031>(
+                    hardware,
+                    params,
+                    9,
+                    vec![EL7031_IDENTITY_A, EL7031_IDENTITY_B],
+                )
+                .await?;
+
+                let el7031_config = EL7031Configuration {
+                    stm_features: shared_config::el70x1::StmFeatures {
+                        operation_mode: EL70x1OperationMode::DirectVelocity,
+                        speed_range: shared_config::el70x1::EL70x1SpeedRange::Steps1000,
+                        ..Default::default()
+                    },
+                    stm_motor: StmMotorConfiguration {
+                        max_current: 1500,
+                        ..Default::default()
+                    },
+                    pdo_assignment: EL7031PredefinedPdoAssignment::VelocityControlCompact,
+                    ..Default::default()
+                };
+
+                device
+                    .0
+                    .write()
+                    .await
+                    .write_config(&device.1, &el7031_config)
+                    .await?;
+
+                device.0
+            };
+
+            // Role 10: Addon Motor 4 EL7031
+            let el7031_addon4 = {
+                let device = get_ethercat_device::<EL7031>(
+                    hardware,
+                    params,
+                    10,
+                    vec![EL7031_IDENTITY_A, EL7031_IDENTITY_B],
+                )
+                .await?;
+
+                let el7031_config = EL7031Configuration {
+                    stm_features: shared_config::el70x1::StmFeatures {
+                        operation_mode: EL70x1OperationMode::DirectVelocity,
+                        speed_range: shared_config::el70x1::EL70x1SpeedRange::Steps1000,
+                        ..Default::default()
+                    },
+                    stm_motor: StmMotorConfiguration {
+                        max_current: 1500,
+                        ..Default::default()
+                    },
+                    pdo_assignment: EL7031PredefinedPdoAssignment::VelocityControlCompact,
+                    ..Default::default()
+                };
+
+                device
+                    .0
+                    .write()
+                    .await
+                    .write_config(&device.1, &el7031_config)
+                    .await?;
+
+                device.0
+            };
+
             // Digital outputs for SSR control (24V to external SSRs for 60W heaters)
             let heater_ssr_1 = DigitalOutput::new(el2004_1.clone(), EL2004Port::DO1);
             let heater_ssr_2 = DigitalOutput::new(el2004_1.clone(), EL2004Port::DO2);
@@ -355,6 +423,14 @@ impl MachineNewTrait for Gluetex {
                     EL7031_0030StepperPort::STM1,
                 ),
                 spool: StepperVelocityEL70x1::new(el7041, EL7041_0052Port::STM1),
+                addon_motor_3: StepperVelocityEL70x1::new(el7031_addon3, EL7031StepperPort::STM1),
+                addon_motor_4: StepperVelocityEL70x1::new(el7031_addon4, EL7031StepperPort::STM1),
+                addon_motor_3_controller: super::addon_motor_controller::AddonMotorController::new(
+                    200,
+                ),
+                addon_motor_4_controller: super::addon_motor_controller::AddonMotorController::new(
+                    200,
+                ),
                 tension_arm: TensionArm::new(AnalogInput::new(
                     el7031_0030,
                     EL7031_0030AnalogInputPort::AI1,