New rotary doesn’t rotate correctly (not like other problems)

Usually, it’s the cable that does not fit. If the motor behaves erratically, try to change the order of the connector, that might help.

Based on the behavior you described, there are a few potential issues to troubleshoot with your rotary setup on the Elegoo Phecda and LightBurn. Here's a breakdown of steps to identify and resolve the issue:
1. Check Rotary Motor Connection
- Cable and port connection: Ensure the rotary chuck is securely plugged into the Y-axis motor cable. Loose or partially connected cables can cause erratic motor movements.
- Cable compatibility:Verify that the wiring for the rotary chuck matches the pin configuration of the Y-axis output on your machine. Some rotary tools require rewiring or adapters to match the engraver's output.
2. LightBurn Settings
- Rotary Setup:Double-check the rotary settings in LightBurn.
  - Go to `Tools > Rotary Setup` and ensure the correct steps per rotation, roller diameter, and object diameter are entered. If the manual provided steps per rotation, input that value directly.
  - If you're using a chuck-style rotary (as opposed to a roller-style), make sure "Chuck Rotary" is selected.
  - Disable Homing: As you already turned off homing, double-check that the machine doesn’t still attempt to home. Erroneous homing attempts could interfere with the rotary tool.
  - Manual Adjustment:In LightBurn, test setting extremely low steps per rotation (e.g., 100) or high steps per rotation (e.g., 10,000) to see if there's any predictable effect on the movement consistency.
3. Firmware Settings
- Steps per millimeter calibration:** If the rotary's steps per millimeter are not correctly calibrated, you may encounter inconsistent movement. Use the command `$$` in the console in LightBurn to check the steps for the Y-axis (commonly `$101` for Y). Compare this value to the manual or the rotary tool specs.
  - If you suspect the steps-per-mm for the Y-axis is miscalculated for rotary use, you can adjust it temporarily with a command like `$101=200` (replace `200` with your desired value).
  - Note: Reset the original `$101` value when switching back to non-rotary use.
4. Mechanical Checks
- Chuck Calibration:
- Verify the chuck rotates freely and smoothly when manually turned.
- Check for physical obstructions or stiffness in the rotary chuck’s movement.
- Alignment: Ensure the rotary tool is level and the object is securely clamped in the chuck to avoid slippage.
5. Test Motor and Controller**
- Motor behavior: With the rotary attached, send manual commands to jog the Y-axis in consistent increments (e.g., `G0 Y10` or `G0 Y-10`) using LightBurn's console or another g-code sender. Monitor whether the chuck moves consistently.
- Swap axes:As a diagnostic step, temporarily connect the rotary to the X-axis instead of the Y-axis and issue movement commands. If the issue persists on the X-axis, the problem is likely with the rotary tool hardware or its wiring.
- Engraver board: Test the Y-axis output by reconnecting the original Y-axis motor to see if it behaves as expected. If the Y-axis motor moves erratically, the issue may lie with the controller or firmware.
6. Test Rotary Hardware
- Faulty rotary motor: If possible, test the rotary tool on another machine or controller to confirm whether the issue is specific to the chuck.
- Driver issue: Some rotary tools require specific driver settings for microstepping. Ensure your engraver's stepper driver is compatible with the rotary chuck's motor.
7. Update LightBurn
- Ensure you’re running the latest version of LightBurn. Older versions may have compatibility issues with certain rotary tools or engravers.

Potential Causes Based on Symptoms
1. Rotary tool wiring issue: Erratic movement can result from misconfigured or loose wiring connections.
2. Incorrect steps-per-mm: Improper Y-axis step calibration can lead to inconsistent movement.
3. Controller or firmware issue: A misconfigured firmware setting could cause the Y-axis to behave unpredictably with the rotary attached.
4. Faulty rotary motor: If the chuck behaves inconsistently regardless of settings, the motor or internal components may be defective.
Next Steps
1. Perform the mechanical and LightBurn checks above.
2. Test the rotary on a different machine if possible.
3. Contact Creality support or the retailer to inquire about known compatibility issues or request a replacement if the chuck appears faulty.