BoLang Documentation

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bolang V4 Online Tutorial Materials

 

For controllers shipped before April, the RS232 chip on the mainboard is powered by 5V, which may cause the chip to
burn out or break down. We recommend inspecting your mainboard and, even if no failure has occurred, performing the
following jumper-wire modification to switch the power supply to 3.3V. First, cut off the original 5V power supply
trace.

 

Then, connect pin 1 of the chip to the middle pin of the AMS1117-3.3V (i.e., the 3.3V output).
Controllers shipped after April have already been fixed with this jumper-wire modification.

 

 

Compensation Plan:

For units where the chip has not been damaged and is still working normally — if the user performs the jumper-wire
modification to 3.3V supply themselves, a refund of 75 RMB will be issued.

For units where the chip has already been damaged but the user is able to replace the chip themselves and restore
normal operation, a refund of 150 RMB will be issued.

For units where the chip has already been damaged and the user is unable to resolve it themselves, a replacement
mainboard will be shipped free of charge, or a full return and refund will be provided.

 

 

A few users have reported a popup message “Connection to the controller lost”. Please click “Online Firmware Update” to update the
controller firmware, and make sure the firmware date is on or after 2026-04-25.

 

Firmware and instructions for the dual Y-type gantry have been released.

https://www.bolangsk.cn/docs/dual-y-machine/

 

Some users set the emergency stop signal to normally closed but do not actually connect an emergency stop switch, which causes the controller to trigger the emergency
stop signal, i.e. Alarm:10. When the controller is in the emergency stop state, you cannot run the machining program or change settings. You can short the controller’s
ESTOP terminal to GND, then power it off and restart it to clear the emergency stop alarm.

 

Methods to fix USB flash drive read problems, shipped before January 28, 2026.

 

https://www.bolangsk.cn/docs/usb-flash-drive-file-transfer/

 

It is recommended that you connect the controller to WiFi to keep the system software updated, as it is still being refined.

 

Hello dear buyer, we are the direct manufacturer of this product. As this product is still under development, if you encounter any product issues, please contact us via email first. We will assist you in resolving the problem, or send replacement parts for repair, or process a return and refund. If you directly apply for a refund without any communication, it will be handled automatically by the AliExpress platform, and we will have no access to intervene, which makes it impossible to effectively resolve the issue.

 

For usage-related questions, please send an email to hankecnc@gmail.com or join our Discord 💬

 

E-LINK Software Download (for wireless file transfer between controller and user computer)