Issue description
When using your xTool Apparel Printer and xTool OS1 Shaker Oven, you may encounter a “Printer film jam” error message. This may appear as Error code: checkByEncoder or filmJam2 on either:
- xTool Studio, or xTool Creative Space (XCS) software
- The printer’s LCD control panel

Error Code: checkByEncoder

Error Code: filmJam2
In some cases, you may also hear a distinctive "clicking" or "cracking" noise from the PET film feed, or see the film coming out of the delivery slot in an abnormal way (or the film cannot come out of xTool OS1).

This comprehensive guide will help you diagnose and resolve this issue efficiently.
Possible causes:
- There is excessive powder buildup on the film detection sensor.
- There is an actual physical jam of the film.
- The film jam sensor inside xTool OS1 is dirty, triggering false readings.
- The film roll is skewed or unevenly wound.
- The film is not correctly aligned with the right white guideline on the processing area of the printer.
- The printer and xTool OS1 are not assembled or connected correctly.
- (Rare) A small block of melted adhesive has formed at the oven's film outlet, triggering false sensor readings.
Troubleshooting
Step 1: Check for actual film jam
- Listen for Strange Sounds:
An actual film jam typically produces distinctive "clicking" or "crashing" sounds from the shaker oven. - Use the Film Feed Function:
1. Navigate to: xTool Studio (or xTool Creative Space) > Device settings > Accessory information > Film material control
2. Click the "Feed" button to force the jammed PET film out of the delivery slot.

- Manual Removal (if needed):
1. If automatic feeding fails, allow the shaker oven to cool completely.
2. Turn the power back on, then press and hold the "Feed" button to check if the film comes out of the delivery slot.
3. Open the maintenance door and carefully remove the jammed film by hand.
Note: After removal, close the sliding door first, then close the maintenance door.
- No Actual Jam:
If you determine that there is no material jam, the error may be a false alert from the device. Proceed to Step 2.
Step 2: Clean the film jam sensor
Tools required: Cleaning brush (Included in your package)
Sensor contamination is a common cause of false "film jam" errors.
- Access the Sensor:
Slide out the used powder bin of the oven device to access the film jam sensor; locate the sensor as illustrated in the image below.
- Brush the Sensor:
Using a cleaning brush, gently brush away any dust or debris from the sensor.

- Reassemble & Test:
1. Reinstall the waste powder container securely.
2. Try operating the device again. If the error message persists, proceed to Step 3.
Step 3: Device Self-Check
- Restart the device first, then perform a self-check to remove any irregular film from the front end.

- If the self-check fails, please refer to the troubleshooting video for solutions: Troubleshoot "Device Self-Check" Failure for xTool Apparel Printer & xTool OS1
- If there are no irregular films or if the issue persists after taking the above steps, proceed to Step 4.
Step 4: Watch the troubleshooting video
- Please check each item in the video: xTool Apparel Printer & OS1 Troubleshooting: PET Film Not Feeding into Oven
- If you have finished watching, you can check the following most likely causes.
Step 5: The right way for film-roll alignment
- First, roll up the film, keeping both sides even.

- Leave only a small portion of the film inside the device, then pull it out from the middle. This ensures the film is in the correct position.

- Please reconfirm the exact location of the film using the above confirmation method before proceeding to Step 6.
Step 6: Check the distance
- Make sure the film does not overlap the white marking line; leave a gap of about 0.5 mm between the film and the white marking line.

- If any deviation is found, please adjust the film according to the video: Replace the Brackets & Adjust the Ball Bearings on xTool Apparel Printer
- If everything above is correct, please proceed to Step 7.
Step 7: Perform alignment calibration
- After ensuring the film and white line are correctly positioned, perform a proper alignment calibration: xTool Apparel Printer & xTool OS1: Film Alignment Calibration
- During alignment calibration, the head of the film needs to reach within the marking line (just within the thick line, whether slightly above or below)

- If the issue persists, please proceed to Step 8.
Step 8: Reset the alignment calibration value
- Ensure that the firmware version is 40.100.025.000.ht3 or later.

- Record the last six digits of the SN code.

- Follow the steps below to reset the alignment calibration value. Enter the last six digits of the SN number you recorded earlier.

If the error remains unresolved after following the previous steps, it might be necessary to replace one or more components. Proceed to the "If the problem persists" section to contact xTool Customer Service for further assistance.
If the problem persists
Should the issue persist after completing the preceding steps, submit a ticket via the "Submit a Ticket" button in the "Help Ticket" section below. The standard response time for xTool Customer Service is one business day.
Please include the following details to facilitate a quick diagnosis:
- Photo showing the position of the film and the white marking line

- Photo of the film reaching the mark line during alignment calibration

- Video of the film showing the belt contacting the oven

- Calibration value

- Work log files

- Serial Number
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