Marked balls and camera-based monitors

Not every monitor wants a marked ball. Some read spin from a mark. Some read it from the ball's own surface. Your monitor's guide settles which, and this page explains why the split exists.

Why a mark helps

A launch monitor has to work out how fast the ball is spinning, and on which axis. A plain white ball gives a camera or radar little to follow. A logo, a line or a dot gives it something to track.

SkyTrak's guide asks for a white ball that's clean and has a logo or line. The mark should face the monitor. That gives better spin readings, indoors or out.¹

Notice the order of that advice. Clean first. White. Then the mark.

Dots for radar units

Radar monitors work differently from cameras. GolfBays sells metallic reflective stickers that sit on the ball, and says they give radar launch monitors more accurate spin readings.²

That's a seller's claim about its own product. If you're tempted by dots, check whether your monitor's maker recommends them and how it wants them placed. No maker guide saved for this site gives a rule for placing dots.

Monitors that don't ask for a mark

Uneekor's spec list for the EYE XO gives the ball type as "Any".³ A retailer's review of another Uneekor model says ball data comes through Dimple Optix, so you grab any ball off the shelf and go.⁴

So the same hobby has two camps. One camp wants a mark. The other reads the dimples. You can't tell which you're in from the shape of the unit alone.

Where range balls fit

A reference work says range balls commonly carry printed bars or lines.⁵ For a monitor like SkyTrak, a marked line might help. For a screen, there's a second question, because Elite Screens says to avoid golf balls with scuffs or markings.⁶ See range balls and course balls indoors for how those two pieces of advice collide.

How the mark should sit

Follow your monitor's own guide for this, to the letter. The one maker source saved here, SkyTrak, says to set the ball with the line or logo facing the monitor.¹ For other units, I can't give you a placement rule from a maker, so I won't invent one.

Some practical things you can do without guessing:

• Wipe the ball before you place it, since the guide asks for a clean one.
• Place every ball the same way, so a change in the reading points to the swing and not the setup.
• Retire any ball whose mark has worn off or smeared.

The last two are habits, not maker rules. They're easy to follow all the same.

One safety line

Put a real club through a full swing in your room before you commit to a layout. Nobody should stand in the hitting area while balls are in play. For space figures, trust your enclosure guide.