This article describes the complete process of using xTool Rotary Attachment 3 (hereinafter referred to as RA3) for cylindrical workpieces on xTool P2/P2S.
For more information about RA3, refer to xTool Rotary Attachment 3 User Guide.
Preparations
- Turn on xTool P2/P2S, and use the USB cable included in the P2/P2S package to connect it to your computer.

- Download and install the xTool software.

- Open the software and select “+ New Project”.

- Select the icon on the left of the menu button (…).

- Select "+ Add Device".

- In the “Connect device” interface, under the “USB” tab, select the P2/P2S device connected to your computer.

- Once the connection is successful, the device status will show "Ready".

- According to the processing scenario, select the mode "Chuck – Use rotary attachment" or "Roller – Use rotary attachment".

RA3 auto mode
The following uses the jaw chuck mode of RA3 as an example to illustrate the operation method in auto mode.
- Refer to Install RA3 onto xTool P2/P2S to install RA3 in jaw chuck mode onto xTool P2/P2S.

- When the mode on the right side of the software interface is "Chuck – Use rotary attachment" or "Roller – Use rotary attachment", the software will automatically recognize the RA3. Here, we select the mode "Chuck – Use rotary attachment".

- From the dropdown menu under “Material”, select “RA3 Auto Mode”.

- Close the lid of xTool P2/P2S.
RA3 central axis calibration (before first use and after use for a long time)
RA3 central axis calibration is used to ensure that the design is accurately aligned with the workpiece during processing.
- Select the menu button (…) next to the device name and then select “Device settings”.

- Select "Accessory settings" and then select "Calibrate".

- Select "Next".

- Check whether there are jaws, the jaw chuck, or a workpiece on RA3 placed in xTool P2/P2S (oversized workpieces may collide with the laser module). If present, remove them before performing the central axis calibration.
- Select "Start calibration".

- After calibration is complete, the software will automatically go to the “Calibration result” page. Select “Got it”.

⚠️If the laser module hits a large workpiece, press the emergency stop button located at the back-right of xTool P3. After removing the workpiece, release the emergency stop button and perform the central axis calibration again.

Select the material
- Select "Unknown material".

- Select "Search Materials".

- Enter keywords to search, for example, “tumbler”.

- Under the “Metal” tab, select the tumbler style and then select “Apply”.

Modeling
Standard modeling
- From the dropdown menu under “Material”, select “RA3 Auto Mode”.

- Select the modeling button.

- Follow the instructions in the pop-up window: place the material, ensure the handle is oriented correctly, and then select “Quick modeling”.

💡You can also choose to remove the tumbler handle and place the tumbler back onto the jaw chuck components. In the software interface, check “Handle removed”, and then select “Quick modeling”. In quick modeling mode, the system only detects the starting point.
- After modeling is complete, the system will prompt “Measurement complete…”. The white area indicates the workable area, while the gray area indicates the non-workable area. Add processing elements (patterns or text) within the white area.

The RA3 icons in the software interface represent different surfaces, and the dashed lines above the icons indicate the central axis of the workpiece.
- A handled cup is shown in the image below. "0°" indicates the cup handle is facing directly upward, "180°" indicates the cup handle has been rotated 180 degrees clockwise or counterclockwise, "-90°" indicates the cup handle has been rotated 90 degrees counterclockwise, "90°" indicates the cup handle has been rotated 90 degrees clockwise, "-45°" indicates the cup handle has been rotated 45 degrees counterclockwise, and "45°" indicates the cup handle has been rotated 45 degrees clockwise.

- A cup without a handle is shown in the image below. "0°" indicates the front of the cup is facing directly upward, "-180°" indicates the cup has been rotated 180 degrees counterclockwise, "-90°" indicates the cup has been rotated 90 degrees counterclockwise, "90°" indicates the cup has been rotated 90 degrees clockwise, and "180°" indicates the cup has been rotated 180 degrees clockwise.

- Select “Preview” at the bottom-right corner of the software interface to see how the processing elements will appear on the workpiece. You can use the left mouse button to click and drag the workpiece to speed up the preview display.

Standard modeling (for non-official materials)
- If you are not using official materials, select the modeling button.

When using "RA3 Auto Mode", avoid processing reflective materials or materials with a height difference exceeding 4 mm (such as the bottle shown in the image below), as this may lead to recognition or modeling failure. For reflective materials, it is recommended to choose "RA3 Manual Mode".

- After modeling is complete, the system will prompt “Measurement complete…”. The white area indicates the workable area, while the gray area indicates the non-workable area. Add processing elements (patterns or text) within the white area.

- Select “Preview” at the bottom-right corner of the software interface to see how the processing elements will appear on the workpiece. You can use the left mouse button to click and drag the workpiece to speed up the preview display.

Set processing parameters
Set the power, speed, pass, lines per cm, engraving mode, and other parameters in the panel on the right side of the software interface.

Start processing
- Check whether the workpiece is securely positioned.
- Select “Process” to go to the "Check before processing" page. Then select "Start".
- Press the button on xTool P2/P2S to start processing.

💡After selecting “Process”, select “Start” in the “Check befor processing” pop-up window. If the power value is too low (for example, 1%), selecting “Process” may trigger a warning. Increasing the power will prevent this warning from appearing.
Differences in roller mode
When RA3 is assembled in roller mode, the following differences apply.
- Select “Roller – Use rotary attachment” on the “Select processing mode” pop-up window.

- From the dropdown menu under “Material”, select “RA3 Auto Mode”.

- Select the modeling button on the right (make sure the lid of xTool P2/P2S is open).

- Select "Move" on the “Start modeling” pop-up window.

💡If the red dot is not at the highest point of the workpiece’s central axis, enter a value (for example, 5) in “Distance(mm)” and use the Up/Down/Left/Right buttons for fine adjustment.

- Once the red dot is at the highest point, check “Confirm red dot at highest point”.

- Select "Next". The laser module will automatically measure the diameter and height of the cylinder.

Differences in manual mode
When using manual mode as the processing mode, the following differences apply (using jaw chuck mode as an example).
- From the dropdown menu under “Material”, select “RA3 Manual Mode”.

- After measuring the diameter or perimeter of the workpiece with a caliper or tape measure, enter the measured value into the software interface.

- Click the precision measurement icon below the diameter/perimeter value.

- Select "Move" on the "Aimed-measure" pop-up window.

💡If the red dot is not at the highest point of the workpiece’s central axis, enter a value (for example, 5) in “Distance(mm)” and use the Up/Down/Left/Right buttons for fine adjustment.
- Once the red dot is at the highest point, select “Measure”. The system will automatically fill the measured distance into the distance field.

More information about key components of RA3
Functions
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| Raising the jaw chuck components allows processing of larger workpieces. |

| Suitable for processing slender, easily rolling workpieces (for example, pens and chopsticks); non-slip surface with adjustable roller spacing. |

| Secures the roller components, ensuring the workpiece remains accurately positioned during processing. |

| Secures the workpiece. |

| Ensures the workpiece surface is level to prevent engraving tilt. |

| Measures workpiece perimeter or diameter for parameter setup and clamp adjustment. |
Use and maintenance recommendations
|

| Depending on the size and shape of the workpiece, you can choose to use only the cylindrical jaws or both the T-shaped and cylindrical jaws. After clamping the workpiece, ensure it is securely held. When replacing the jaw chuck, always power off the machine and make sure the jaw chuck is properly fastened to prevent the workpiece from loosening or falling during processing. |

| During installation, keep the rollers parallel to the workpiece contact surface and regularly clean the roller surfaces to prevent dust from affecting clamping force. |

| After height adjustment, ensure all screws are tightened to prevent movement during processing. |

| Recalibrate the level after changing workpieces or moving RA3. |

| Ensure correct connector orientation when plugging or unplugging to avoid damaging the pins. It is recommended to regularly check whether the cables are loose or worn, and replace them if necessary. |
Common issues and solutions
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Check whether the jaw chuck or rollers are properly installed and adjust the clamping force as needed. |
Check whether the roller transmission module and the holder for roller components are secure, and clean any debris from the roller surfaces. |
Recalibrate using the mini level to ensure the workpiece surface is level. |
Check if the connector of the connection cable is loose and replace the connection cable if necessary. |
Related links
xTool P2 User Guide
xTool P2S User Guide
xTool Rotary Attachment 3 User Guide