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[GH-ISSUE #807] [Bug]: H2D Pro - The extrusion motor is overloaded #540

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opened 2026-05-06 12:30:44 +02:00 by BreizhHardware · 6 comments

BreizhHardware commented

2026-05-06 12:30:44 +02:00

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Originally created by @cadtoolbox on GitHub (Mar 25, 2026).
Original GitHub issue: https://github.com/maziggy/bambuddy/issues/807

Originally assigned to: @maziggy on GitHub.

Bug Description

We're seeing more "extrusion more is overloaded" errors lately. It seems to be happening more often with our H2D Pros when using Bambuddy to print.

See attached MQTTX Log. I want to be able to rule out Bambuddy as the root cause and am going to do some offline testing comparison on prints that failed and send using the same using Bambu Studio.

3DP-239-559.json

Expected Behavior

No errors: "The extrusion motor is overloaded"

Steps to Reproduce

See above

Printer Model

H2D Pro

Bambuddy Version

v0.2.2.1

Printer Firmware Version

01.01.00.00

Installation Method

Other

Operating System

Windows

Relevant Logs / Support Package

bambuddy-support-20260325-054941.zip

Screenshots

No response

Additional Context

No response

Checklist

I have searched existing issues to ensure this bug hasn't already been reported
I am using the latest version of Bambuddy
My printer is set to LAN Only mode
My printer has Developer Mode enabled

Originally created by @cadtoolbox on GitHub (Mar 25, 2026). Original GitHub issue: https://github.com/maziggy/bambuddy/issues/807 Originally assigned to: @maziggy on GitHub. ### Bug Description We're seeing more "extrusion more is overloaded" errors lately. It seems to be happening more often with our H2D Pros when using Bambuddy to print. See attached MQTTX Log. I want to be able to rule out Bambuddy as the root cause and am going to do some offline testing comparison on prints that failed and send using the same using Bambu Studio. [3DP-239-559.json](https://github.com/user-attachments/files/26238469/3DP-239-559.json) ### Expected Behavior No errors: "The extrusion motor is overloaded" ### Steps to Reproduce See above ### Printer Model H2D Pro ### Bambuddy Version v0.2.2.1 ### Printer Firmware Version 01.01.00.00 ### Installation Method Other ### Operating System Windows ### Relevant Logs / Support Package [bambuddy-support-20260325-054941.zip](https://github.com/user-attachments/files/26238585/bambuddy-support-20260325-054941.zip) ### Screenshots _No response_ ### Additional Context _No response_ ### Checklist - [x] I have searched existing issues to ensure this bug hasn't already been reported - [x] I am using the latest version of Bambuddy - [x] My printer is set to LAN Only mode - [x] My printer has Developer Mode enabled

BreizhHardware

2026-05-06 12:30:44 +02:00

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BreizhHardware commented

2026-05-06 12:30:44 +02:00

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@maziggy commented on GitHub (Mar 25, 2026):

A few observations:

The captured print (box bottom_3.24) was sent from the slicer directly (print_type: local), not through Bambuddy's queue or reprint system. Bambuddy was monitoring it via MQTT only.
The error 0x0300801E is a motion controller error (extrusion motor overloaded) — this is a firmware/hardware-level error that Bambuddy doesn't have control over during a print.
There are also 5 HMS errors active on that printer simultaneously, and ext_tool.low_prec: true (low precision calibration flag) — which may point to something going on with that specific machine.

Your plan to do comparison testing (same prints, same printers, with and without Bambuddy) is exactly the right approach. That will tell us definitively whether Bambuddy's presence is a factor.

A couple of questions:
1. When you say it happens "more often with Bambuddy" — are these prints started through Bambuddy (queue/reprint), or just monitored by Bambuddy while sent from BambuStudio?
2. Is this happening across multiple H2D Pros or concentrated on specific machines?
3. What slicer and version are you using?

@maziggy commented on GitHub (Mar 25, 2026): A few observations: - The captured print (box bottom_3.24) was sent from the slicer directly (print_type: local), not through Bambuddy's queue or reprint system. Bambuddy was monitoring it via MQTT only. - The error 0x0300801E is a motion controller error (extrusion motor overloaded) — this is a firmware/hardware-level error that Bambuddy doesn't have control over during a print. - There are also 5 HMS errors active on that printer simultaneously, and ext_tool.low_prec: true (low precision calibration flag) — which may point to something going on with that specific machine. Your plan to do comparison testing (same prints, same printers, with and without Bambuddy) is exactly the right approach. That will tell us definitively whether Bambuddy's presence is a factor. A couple of questions: 1. When you say it happens "more often with Bambuddy" — are these prints started through Bambuddy (queue/reprint), or just monitored by Bambuddy while sent from BambuStudio? 2. Is this happening across multiple H2D Pros or concentrated on specific machines? 3. What slicer and version are you using?

BreizhHardware commented

2026-05-06 12:30:44 +02:00

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Owner

@cadtoolbox commented on GitHub (Mar 25, 2026):

We're using Bambu Studio, 2.5.0.66. It seems consistent on all (3) H2D Pros. For that particular job, the user must have sent a reprint after the first failure from the actual printer screen.

I'll have more information today or tomorrow with some comparison logs.

@cadtoolbox commented on GitHub (Mar 25, 2026): We're using Bambu Studio, 2.5.0.66. It seems consistent on all (3) H2D Pros. For that particular job, the user must have sent a reprint after the first failure from the actual printer screen. I'll have more information today or tomorrow with some comparison logs.

BreizhHardware commented

2026-05-06 12:30:44 +02:00

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@Keybored02 commented on GitHub (Mar 25, 2026):

Any chance this a resurrection of #245 ?

@Keybored02 commented on GitHub (Mar 25, 2026): Any chance this a resurrection of #245 ?

BreizhHardware commented

2026-05-06 12:30:45 +02:00

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@cadtoolbox commented on GitHub (Mar 26, 2026):

@Keybored02 I don't think so. That issue was 100% failure rate. This is more like 10-15% of the jobs. Today we had 100% success rate so I'm leaning more towards AMS issues than anything Bambuddy related.

I'm also of the opinion now that the H2D Pro is not the greatest designed Bambu printers. The dual nozzle sounds great in theory but it's actually more limiting than what it should be providing.

@cadtoolbox commented on GitHub (Mar 26, 2026): @Keybored02 I don't think so. That issue was 100% failure rate. This is more like 10-15% of the jobs. Today we had 100% success rate so I'm leaning more towards AMS issues than anything Bambuddy related. I'm also of the opinion now that the H2D Pro is not the greatest designed Bambu printers. The dual nozzle sounds great in theory but it's actually more limiting than what it should be providing.

BreizhHardware commented

2026-05-06 12:30:45 +02:00

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@maziggy commented on GitHub (Mar 31, 2026):

Any news?

@maziggy commented on GitHub (Mar 31, 2026): Any news?

BreizhHardware commented

2026-05-06 12:30:45 +02:00

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Owner

@cadtoolbox commented on GitHub (Mar 31, 2026):

The issue seems to have subsided with some AMS reconfiguring. I feel confident it's not Bambuddy related now.

@cadtoolbox commented on GitHub (Mar 31, 2026): The issue seems to have subsided with some AMS reconfiguring. I feel confident it's not Bambuddy related now.