Process to set the optimal working height between the entry point and the exit point of the thread in a twisting machine and/or thread spinning machine, and twisting machine and/or thread spinning machine that applies such process

A process to set the optimal working height between the thread entry point (PE) and the exit point (PS) on a twisting and/or thread spinning machine (1) that operates with two or more balloons (B), that comprises

• feeding means (2) of the untwisted thread (8),
• guiding means (3) that define the thread entry point (PE) at the upper part of a twisting area (4),
• a cursor that slides on a ring or rocker (6) and that defines the thread exit point (PS) at the lower part of the twisting area (4), the thread exit point (PS) being mobile in height, and
• collecting means of the twisted thread or bobbin (5) with a winding diameter (d) of the thread on the bobbin (5),
• the distance (LB) being the height of the twisting area (4) located between the thread entry point (PE) and the thread exit point (PS) where the thread (8),
• characterized in that it comprises a step where the distance (LB) increases or decreases by displacing dynamically the thread entry point (PE) and/or the thread exit point (PS) so that the variations of the tension of the thread (8) produced by the variation of the winding diameter (d) of the thread (8) on la bobbin (5) counter each other, achieving a constant tension on the thread during the working cycle of the spinning or twisting process.