¶ CM2786：Motor speed limit exceeded
¶ Applicable model: K2 Plus
¶ Why does this prompt appear?
The motor speed sensor detected that the motor speed exceeded its operating limit. To protect the device, the system triggered a software emergency stop function, stopping operation to avoid further damage.
¶ How to solve it?
First check the screen and view the pop-up content to see which axis is reporting an error:
Reduce printing/running speed: Lower the printing speed parameters in the slicing software or use default parameters to ensure they meet the machine's recommended values.
Frequent errors may be due to servo motor calibration issues. Calibrate K2 Plus Servo Motor
¶ Common troubleshooting steps for Extruder Motor:
¶ Applicable for CM2784/CM2788/CM2786/CM2789
Pause printing, deal with jammed filament refer to Troubleshooting for K2 Plus Jammed Filament ; after troubleshooting, heat the nozzle and directly load filament into the nozzle to check if the clog is resolved;
Follow steps to switch to external spool holder filment loading, refer to Filament Switches from CFS loading to Spool Holder loading. Check if error still occurs. If external spool holder filament feeding reports error, handle clogged nozzle/jammed filament Troubleshooting for K2 Plus Jammed Filament.
Check if nozzle itself is clogged. If clogged, replace directly. K2 Plus package includes a spare nozzle, refer to Replace K2 Plus Nozzle. If nozzle is not clogged, check if filament settings on screen match, e.g. PLA on screen corresponds to PLA filament used.
If external spool holder feeding has no error but printing reports error, check if caused by first layer compression. Refer to Troubleshooting for Layer Compression.
For materials like ABS requiring high hot bed temperature, try preheating the bed before starting print, select print calibration.
If external spool holder feeding has no error, switch to CFS filament feeding. Click any slot to feed, observe if filament buffer and hub motor can move normally.
Buffer working principle: extruder consumes filament causing buffer to move to min position (as shown), hub motor receives buffer signal to feed filament causing buffer to move to max position (as shown). If buffer is stuck on left or right side unable to move, printer reports error, possibly buffer failure, needs replacement.
¶ General troubleshooting steps:
Check the pop-up prompt for specific X/Y/Z/E axis abnormalities, then inspect the corresponding axis parameters.
Pause machine operation: Turn off the power to ensure safety, then begin troubleshooting.
Optimize printing parameters: Reduce printing speed, acceleration, and other parameters, then try printing again or use official default slicing parameters.
Restart the machine: After making adjustments, restart the device to confirm if the issue has been resolved.