The invention concerns a textile machine, in particular a spinning-preparatory machine, a device and a process for contactless measurement and/or adjustment of parameters between mutually opposite strips of card clothing (21, 25). The device comprises inter alia a voltage source (23) and a pulse generator (23a) for generating an alterable potential difference. The tips (22, 26) of the strips of card clothing (21, 25) are electrically conducting, and the pulse generator (23a) is connected to tips (22, 26) such that applying the alterable potential difference between tips (22, 26) of the two strips of card clothing (21, 25) makes it possible to generate at least two successive spark discharges. Means are provided for measuring the time between two spark discharges and/or a frequency measurement (28) for determining the current distance (δ) between the card clothing tips (22, 26).