...seems there is some significant variation between productin batches/sliders precision... Mine was wobbly (left/right, and back/forth), but I have disassembled the phone and corrected the slider in "open" position using some tough love & persuasion - it is solid as a rock left/right now, but is still rocking back/forth about 1.5mm, as before. I have some idea how to correct it, but it is very difficult to modify something such densely packaged/tiny as modern smartphone internals
Originally Posted by gastr
Regarding "slider is never going to be as solid as slate", hmmm, I am not a mechanical engineer, but I could think straight off the top of my hat two separate solutions, how to make it sturdy/non-moving in both open & closed positions, it is just a matter of design (to a larger degree), and manufacturing process (to a lesser degree, because it could be designed quite easily to make it *****-proof in manufacturing to quite a large tolerances)
Of course candybar/slab would be easier to manufacture (none of these challenges), but come on, slider mechanism is but one of the simplest possible mechanical devices, and it is just a matter of designing a proper "parking" catchers at the end of the move, that would catch & immobilise it (and the ones designed for Pre 3 are not well thought out, IMHO, could have been done better very easily). Think about two funnels getting one into another, as an example of a "parking" device I am talking about (and you need three of them to make the connection absolutely rigid in any plane) or some wedges, or some neodymium magnets (that is my next goal, to make my phone "click & catch" open, we will se if it is possible to fit a magnet under the hood the way it could catch & lock the slider at the end of the move)
So it could definitely be done better, and the metal slider itself, hmm, it is not very robust piece of metal IMHO, from what I've seen under the hood, it is rather delicate and all that plastic and even mainboard is more rigid than a slider itself, and only after screwing them all together it has any rigidity at all.