ElixerPro.tools
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Mouse Scroll Wheel & Encoder Jump Tester

Test mouse wheel scrolling, scroll direction, delta distance, and smooth scroll steps. Monitors wheel event deltaY values and direction transitions to identify skipping or erratic rotary encoder wear.

Mouse Scroll Wheel & Encoder Lab

No Jumps Detected
Place pointer here and spin your scroll wheel Tests vertical scrolling, horizontal tilt, and encoder bounce
Vertical Delta Y:
0 px
Last Direction:
Idle
Delta Mode:
Pixels (0)

How to use this test

  1. Place cursor inside scroll testing zone.
  2. Scroll Up steadily and observe accumulator progress.
  3. Scroll Down steadily and observe accumulator progress.
  4. Watch jump detector for sudden reverse direction glitches.

How to understand your result

Looks good: Scroll steps incremented smoothly in intended direction.
Issue observed: Reverse direction spikes detected while scrolling in one continuous motion.

Troubleshooting: what to try next

  • Rotary encoders commonly gather dust; blow compressed air into wheel crevice.
  • Check Windows Mouse Settings lines-per-notch multiplier.

What this test cannot tell you

Delta values vary by operating system scroll acceleration multipliers.

Frequently Asked Questions

EP
Tested & Reviewed by [REAL AUTHOR NAME - OWNER TO COMPLETE]
Last Reviewed: 2026-10-17 • Test Method: wheel event deltaY tracking with sign reversal detection • How We Test