[Fix my robot](https://robotsforthat.com/fix/) / [Pudu BellaBot](https://robotsforthat.com/guides/pudu-bellabot-error-messages/) / Tray detection anomaly
● Checked Nov 9, 2026 From Pudu support

Pudu BellaBot

# Pudu BellaBot "Tray detection anomaly": what it means and the fix

Steps **2**

Tools **None**

Parts None

Works for Pudu BellaBot (BL100, BL101, BL110) and BellaBot Pro delivery robots.

Short answer
**What it means:** With the tray sensor switch on, the robot does not finish the task 5 seconds after the dishes are taken, or it finishes before they are taken.

**Quick fix:** Check the trays are installed correctly.

## Fix it in 2 steps

- Check the trays are installed correctly. Done?
- Clean the tray sensor with a clean cloth or lens cleaner. Did it work?

**Fixed when:** The robot finishes the task once the dishes are taken.

Great, it is fixed. Bookmark this page in case it comes back.

**Still showing Tray detection anomaly?**

It still misreads the trays. Contact your local Pudu distributor, or Pudu technical service at techservice@pudutech.com. Contact Pudu support at +86 755-86952935. Warranty: Varies by component; see the warranty card. [Pudu support →](https://academy.pudutech.com/en/docs/bei-la-Pro-ji-qi-ren-yong-hu-cao-zuo-zhi-nan-V1-0240624)

## Why it happens

- A tray is not installed correctly
- A dirty tray sensor

## Other Pudu BellaBot errors

[Loss of position Positioning failure (I'm lost) ›](https://robotsforthat.com/fix/pudu-bellabot-error-im-lost-positioning-mark/)[Location failed ›](https://robotsforthat.com/fix/pudu-bellabot-error-location-failed-retry/)[Positioning failure on BellaBot Pro ›](https://robotsforthat.com/fix/pudu-bellabot-error-pro-im-lost-starting-location/)[Low battery, ple Battery too low ›](https://robotsforthat.com/fix/pudu-bellabot-error-battery-too-low/)[Suspended ›](https://robotsforthat.com/fix/pudu-bellabot-error-suspended/)[Wheel stuck or tangled ›](https://robotsforthat.com/fix/pudu-bellabot-error-wheel-stuck-or-entangled/)[Motor rotation a Motor error ›](https://robotsforthat.com/fix/pudu-bellabot-error-motor-error/)[Sensor connectio Sensor error ›](https://robotsforthat.com/fix/pudu-bellabot-error-sensor-error/)[POST fails Self test (POST) fails ›](https://robotsforthat.com/fix/pudu-bellabot-error-self-test-fails/)[Robot can't boot Robot will not power on ›](https://robotsforthat.com/fix/pudu-bellabot-error-will-not-power-on/)[Charging failure ›](https://robotsforthat.com/fix/pudu-bellabot-error-charging-failure/)[Robot stops or does not move smoothly ›](https://robotsforthat.com/fix/pudu-bellabot-error-not-moving-smoothly/)[Emergency stop pressed ›](https://robotsforthat.com/fix/pudu-bellabot-error-emergency-stop/)[Red light while charging ›](https://robotsforthat.com/fix/pudu-bellabot-error-red-light-charging/)[All 15 Pudu BellaBot codes →](https://robotsforthat.com/guides/pudu-bellabot-error-messages/)

## Keeps happening? Compare before you replace

[Pudu BellaBot $14,500 · Cat faced tray robot for busy dining rooms that want a show](https://robotsforthat.com/robot/pudu-bellabot/)[Check price →](https://www.robotlab.com/store/bellabot-delivery-robot-for-restaurants)

[Pudu BellaBot Pro $16,000 · Upgraded BellaBot with an 18.5 in ad screen and swappable battery](https://robotsforthat.com/robot/pudu-bellabot-pro/)[Check price →](https://www.robotlab.com/store/bellabot-pro/)

[Bear Robotics Servi vs Pudu BellaBot Point by point](https://robotsforthat.com/vs/bear-robotics-servi-vs-pudu-bellabot/)

**Own a Pudu? Keep it running.** Add it to My Robots. See fixes for your exact model, get an email when parts are due, and ask us to find a repair if it breaks. Free · no password

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## Sources

- [Pudu: BellaBot User Manual, troubleshooting chapter (Pudu help center PDF)](https://resource-wangsu.helplook.net/docker_production/nqpdhq/article/2ByanRUk/attachments/BellaBot_User_Manual-multilanguage.pdf)
- [Pudu: BellaBot Pro Operation Guide V1.0 (RobotShop copy)](https://cdn.robotshop.com/media/P/Pud/RB-Pud-20/pdf/bellabot-pro-guide-v-1-240624.pdf)

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