clamping situation occurs if the motor running ends normally the increase of the clamping force which is performed in the position 16 in the monitoring block is again retaken when to the contrary within the first running routine 15 to be performed the running of the electrical drive ends not normally a new clamping situation occurs the new clamping situation is verified by an additional inquiry 19 in the monitoring block 12 the second clamping inquiry 13 with a positive result activates a new clamping increase at the position 18 so that now after the resulting processing of the first starting routine 15 the second starting routine 19 can be performed with an increased value for the clamping force to be applied after the increase of the releasing force and performing of the second starting routine 19 a testing 21 is performed of the condition whether the electrical drive ends its running normally or it comes again to the clamping situation thereafter the new clamping force increase 18 is taken before the starting or aiming point 11 is branched in addition to the starting routines 15 19 which can be performed with different releasing forces the monitoring block 12 monitors whether for example a previously set motor stoppage time of for example 10 seconds is exceeded or not if it is exceeded the starting or aiming inquiry point 11 is branched and the automatic bridging function is set back.