The SPARKX i7 is equipped with three belts, which are transmission components responsible for driving the movement of the toolhead (X), heated bed (Y), and X-axis (Z) along the designated directions. Proper belt tension helps ensure stable motion and consistent print quality.
The i7 requires manual belt tension adjustment. Below are the detailed tensioning steps.
Required Tools:
H2.0 hex wrench (included with the printer)
H2.5 hex wrench (included with the printer)
X-axis Belt Tensioning
The X-axis belt tensioner is located at the right end of the X-axis. Remove the protective cover to access it.
Use an H2.0 hex wrench to loosen the two tensioning screws counterclockwise by one turn (do not remove them completely).
Move the toolhead left and right three times, then tighten the two tensioning screws and reinstall the protective cover.
Y-axis Belt Tensioning
The Y-axis belt tensioner is located on the chassis beneath the heated bed. Move the heated bed to the rear to access it, then remove the protective cover to expose the two tensioning screws.
Use an H2.5 hex wrench to loosen the two tensioning screws by one turn (do not remove them completely).
Move the heated bed forward and backward three times, then tighten the tensioning screws and reinstall the protective cover.
Z-axis Belt Tensioning
The Z-axis belt tensioner is located at the bottom of the printer. Tilt the printer to access it.
Use an H2.0 hex wrench to loosen the two tensioning screws counterclockwise by one turn (do not remove them completely).
Return the printer to its upright position, perform a Z-axis homing in the “Control → XYZ” menu, and then move the Z-axis up and down three times (make sure the nozzle does not collide with the heated bed).
Tighten the tensioning screws.
Vibration Compensation Calibration
After tensioning the belts on all axes, perform a vibration compensation calibration. Tap “Help → Maintenance → Calibration” and check “Ripple Optimization” to start the calibration. Wait for the calibration to complete, and the printer will be ready for normal use.
