Trackballs and Spinners

A good home arcade is a room system, not a pile of cabinets. Space, electrical service, delivery routes, heat, seating, support and household preferences determine whether a machine remains enjoyable after the novelty wears off.

1. Ball diameter

Treat ball diameter as a practical design constraint for the exact room and machine, not a generic recommendation. Measure or test it, record the result and let that evidence guide the purchase or build.

2. Mounting plate

Work through mounting plate with the real cabinet, controls and room in mind. Confirm the physical fit and support requirements before buying accessories or committing to a layout that becomes expensive to undo.

3. Encoder interface

Test every direction and button in the games that matter, not just in a menu. Check mounting, microswitches, restrictor gates, encoder inputs and player-two controls, and verify that specialty controls such as trackballs or spinners map correctly before calling the panel finished.

4. Spinner weight

Test every direction and button in the games that matter, not just in a menu. Check mounting, microswitches, restrictor gates, encoder inputs and player-two controls, and verify that specialty controls such as trackballs or spinners map correctly before calling the panel finished.

5. Sensitivity

Make sensitivity part of the project checklist. A few minutes of measurement and testing here can prevent the most common outcome in home arcades: a machine that technically works but never quite fits the room or the games you wanted.

6. Cabinet space

Measure the room as a system rather than counting empty wall feet. Mark outlets, door swings, vents, windows, seating and service clearance, then place the largest or least-flexible machines before filling the remaining space.

Related resources

• Room planner
• Setup-cost calculator
• Doorway planner
• Buying checklist

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