Keyboard action explained
This is a common issue: we sometimes receive complaints from our customers regarding the action of our keyboards (I mean the keybeds, the physical keys) being not 100% consistent or being noisy. Usually there are 3 cases:
1) You tried one of our instruments in a store or a friend and then you decided to buy the same instrument. When you have it on disposal, the action of the keyboard is different.
2) The action of your instrument is changing after some months or in winter/summer or just because they are brand new.
3) There are strange noises coming from one or more keys out of the box or after a while.
All cases have the same explanation: keybeds are the direct interface human-instrument so your level of sensivity there is at the maximum level. But at the same time, keys are also probably the most difficult part of the instrument, a mix between electronic, mechanic, materials etc etc. There you have plastic, springs, metal, grease all of them working together. The level of complexity is very high and different batches of instruments can be a little bit different. The keyboard assembly itself has the trend to "relax" after a few months, grease is changing its characteristic, it is sensible to temperature, materials are changing... constantly. So, what is happening on a real acoustic piano, where usually all the mechanics are made of wood and requires a special technician to fix this and that every few years, it's happening on a keyboard made of plastic as well... of course on a different level, but the two things are comparable.
If the instrument comes with a keyboard, please note that the action/stiffness/response/noise of it changes over time due to temperature/usage/storing conditions. This has to be considered normal and it is not a valid reason for consider the instrument "faulty". Please also consider that, sometimes, maintenance is required for keybeds: this involves add grease, cleaning the circuit boards (dust and small particles can enter the keybeds in the space between keys) or fine tuning.