This however is incorrect, all ScrollPoint mice use the same resistive mechanism and all cite the same patent. These ScrollPoint mice are the most common, and in my opinion the nicest for overall features– they are also very easy to work on and modify. If you have different coloured ScrollPoints, you can mix and match button colours. Probably some gorilla glue or any polymer glue will keep it stuck on indefinitely. That’s very interesting as even some laser mice I tested could not work very well on transparent surfaces; dispelling the whole optical vs. Once I determine the cause of the increased sensitivty of the revision B ScrollPoints I will report back here.

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IBM ScrollPoint (31P7405) Mouse

They’ll have patent scollpoint, referenced scroollpoint the bottom for the optical mechanism that determines the movement of the mouse ball. If your ScrollPoint isn’t new and has a damaged rubber coating, just use a magic eraser and gently remove the rubber or let the plastic soak in water and soap for a few hours and rub it off with a coarse cloth. Because of the extra feature being able to use them with both interfaces, these microcontrollers are often found in mice from many vendors.

It should be possible to dump the ROM and modify it to add more features and tweaking to how windows should respond to the ScrollPoint ideally more behaved like the TrackPoint scrolling.

Lenovo ScrollPoint Pro – mouse – PS/2, USB – slate blue Overview – CNET

The original ScrollPoints used a “cat’s tongue” TrackPoint cap: The research document can be read here:. Make sure there is no excess glue to make the buttons taller in height than they were originally: You will have to give it some time ivm you eventually get used to it.

The only colour they were ever released in was metallic black but as mentioned before you can mod them to being Ancient Sage or Slate Blue. Despite IBM’s original Almaden page proclaiming “After a few days with the ScrollPoint, you’ll find you can’t go back” most people still prefer wheels. The original ScrollPoint mouse debuted in to combine the similar TrackPoint mechanism as found on the ThinkPads to replace a standard mouse wheel.


You have to use a fine pair of pliers to snip the excess plastic out, shown here: Sometimes they are listed under 31P, I think this might be only on very early models from Lenovo no longer manufactures any ScrollPoint mice anymore so they’re now officially dead. For an anatomy analysis we’ll use the standard ScrollPoint III the general design is the same across all models–however the ScrollPoint I may be different.

Some minor changes need to be done, either the tabs on the optical base or the older silver scrollppoint need to be cut. Lenovo only manufactures the standard black issue ones. What separates an “optical” mouse from a “laser” mouse is simply the type of scrolllpoint emitting diode used. ScrollPoint Sensor Optimization If scrol,point rely on the ScrollPoint over a conventional ‘wheel’ mouse and are seeking to increase the performance and capability of your ScrollPoint; there are a few modifications that can help the existing sensor used in these mice.

The slate blue mice are presumably less common and were only manufactured with IBM logos because this colour was dropped with the later models. These mice are no longer manufactured as previously mentioned to be fair, 9 years is a rather long manufacturing period for a computer peripheral.

Some of the earlier ScrollPoint Pros suffer from misaligned buttons at the assembly process which results in a click response that isn’t as crisp and slightly spongy. The changes were a more semi-circled shaped body, a better ScrollPoint cap and a third button right above the ScrollPoint.

IBM ScrollPoint Pro (31P8700) Mouse

Speed is controlled based on the pressure applied for continuous-dynamic scrolling; this reduces the strain on the finger caused by standard scroll wheels and also allows the user to adjust the speed on a variable basis not fixed to a set interval at any given time. Internet surfers using this contoured mouse will enjoy increased comfortable and pressure-sensitive scrolling in any direction. As ScrollPoints offer superior functionality to the standard ‘wheel’ igm, it’s very curious why scrollpint alternative design never overtook standard mice.


The first version of the standard three-button ScrollPoint mice were announced in around Like all things, eventually these mice will be harder to find as time goes on. Considering that the pros outweigh the cons, this mouse is worth a try. So, if you work with your left hand, you might as well as skip this one. Many used ScrollPoints will have little to no wear as they are generally not used in service extensively from users ultimately swapping them out for a ib mouse; at least, this was common for a time when IBM bundled ScrollPoints with all of their computers such as IntelliStations but ended after a period due to customer disastisfaction.

I’m not exactly sure what makes them slower since they’re both DPI according to IBMhowever I presume this is either the optical sensor or the microcontroller.

IBM ScrollPoint Pro (31P) Mouse | eBay

It appears there have been two manufacturers for the Slate Blue plastic bezels as the colour can vary from being more blue or purple. Disassembling the ScrollPoint mechanism itself reveals the pads which sense the resistance when compressed, along with the patent number for the technology on the back which doesn’t seem to be an IBM patent:.

After in extensive use the microswitch will cut the plastic of either left or right clickable buttons and the thumb button if you use that frequently. I’m not sure why IBM made these mice more expensive to manufacture as time went on potical to make it easier to repair as they carried a 1 year on-site warranty; or someone internally at IBM wanted to make it easier for people to mod them– unlikely.