Belt Tension Calculator

Proper belt tension is critical for print quality. Too loose causes ringing/ghosting, too tight causes binding and bearing wear.

Measurement Method:

1. Download frequency analyzer app (e.g., "Spectroid" on Android, "Sonic Tools" on iOS)
2. Move print head to center of axis
3. Pluck belt like a guitar string (perpendicular to belt)
4. Note the fundamental frequency (lowest peak in app)
5. Measure free belt length between pulleys with calipers
6. Repeat for both X and Y axes

Target Frequencies (GT2 belts):

• 110 Hz: Ideal for most CoreXY printers
• 100-120 Hz: Safe range for good performance
• <90 Hz: Too loose, will cause ringing
• >140 Hz: Too tight, increases bearing wear

Adjustment Tips:

• Make small adjustments (1/4 turn at a time)
• Both belts should have similar tension
• Re-run input shaping calibration after adjusting
• Check tension monthly as belts stretch over time

Physics: Tension = (4 × L² × f² × m) / 1000000, where L=length, f=frequency, m=linear mass density