EVQWJN007 Trackball Troubleshooting, Fixes and Mods

uConsole
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I recently ordered five EVQWJN007 trackballs, and none of them worked out of the box. It’s clear that modern production and materials are a far cry from the original BlackBerry-era standards.

I’ve been researching how to rescue these units and improve their feel. For a deep dive into the technical specs, check out this resource: EVQWJN007 Trackball.

Key Fixes & Mods

  • Fixing Mechanical Failure: Most “dead” units just have poor tolerances. Increases contact pressure between the ball and the internal rollers, which usually restores tracking instantly.
  • The Glass Ball Mod: I’ve replaced the stock rubber ball with a glass ball. The added mass provides much better inertia and smoother tracking than the lightweight plastic versions found today.

TL;DR: Don’t toss “broken” units. Simple steps fixes the tracking, and swapping to other type of balls makes the experience feel premium.

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QMK firmware for uConsole keyboard
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where do you get the replacement trackballs? i read your post… but it doesn’t mention where i might salvage the right size.

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Amazon or Aliexpress, I think still the rubber ball or any plastic balls would perform better

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