摘要:
A sheet brake for a press contains braking elements diverging in the sheet running direction in order to tauten the printing material sheets transversely. The braking elements are driven so as to circulate at a nonuniform speed. The nonuniform speed of the diverging braking elements results in more effective transverse tautening of the printing material sheets.
摘要:
A method for determining the driver torque setpoint uses inputs from a drive pedal sensor, which senses the pedal position of a drive pedal. Depending on at least one switching parameter, different modes of calculation are activated, thus enabling the pedal position to be assigned to the driver torque setpoint. After the switchover from an old mode of calculation to a new mode of calculation, the driver torque setpoint is progressively adjusted, starting from the driver torque setpoint under an old interpretation of the pedal position, corresponding to the old set of characteristics, towards the driver torque setpoint under a new interpretation of the pedal position, corresponding to the new set of characteristics, and specifically in dependence on the time graph of the pedal position and simultaneously as a function of time, disregarding the time graph of the pedal position.
摘要:
A process provides for the safe operation of a printing machine. The printing machine has a first cylinder driven by a first motor, and a second cylinder driven by a second motor. The first cylinder accepts sheets of paper from the second cylinder or delivers them to the second cylinder by a gripper system. In the case of a deviation in the synchronized running between the cylinders, the gripper system is retracted at least in part far enough into the first cylinder that the possibility of a collision of the gripper system with the second cylinder is eliminated.
摘要:
In a method for regulating the power supply of a plurality of field devices S1, S2, S3, A1, A2, connected to a data bus DBL and supplied with electrical current over the data bus DBL, the electrical current requirements of the individual field devices S1, S2, S3, A1, A2 are determined, and the electrical current consumptions of the field devices S1, S2, S3, A1, A2 are adjusted by means of corresponding control signals. In this way, the electrical current consumption of individual field devices S1, S2, S3, A1, A2 can be centrally adjusted and therewith the process conditions matched.
摘要:
A method and device for suppressing vibrations in a printing press includes placing, on at least one element of the press, a mass that vibrates freely with one degree of freedom, determining the rotational speed of the press and feeding the speed to a control device, and, in the control device, utilizing the rotational speed, determining an actuating variable and feeding the actuating variable to at least one actuator, at least one vibration parameter of the mass being changed in accordance with the rotational speed by the actuator.
摘要:
A method of driving a machine related to printing technology, wherein movable elements forming a kinematic chain are coupled with one another via at least one gear mechanism, includes infeeding torque components by a respective motor of at least one group of two motors, respectively located at least at two elements associated with one another. The torque components are of equal amplitude but have opposite directions of rotation, for suppressing disruptive oscillations at least at the one group of two motors. The amplitude of the torque components is proportional to relative rotation of the two elements associated with one another. Rotary encoders are provided to obtain signals for reproducing rotational positions of the elements.
摘要:
There is a description of a device for the production of warp knitted fabrics which are being produced on one knitting machine having two separate and independent knitting areas. Each of the independent knitting area has at least one guide bar and at least one needle bar. The knitting areas are placed back-to-back so that the directions of the respective material pull-offs are outwardly from the machine away from each other. The needle bars and the guide bars are supported by a common machine frame which has been provided with a common drive serving both knitting areas. Thereby, a high productivity is obtained having a minimum of space and energy requirements and a low initial investment cost.
摘要:
A stator vane assembly is provided having a plurality of stator vane segments and support rings. Each stator vane segment includes an inner platform, an outer platform, an airfoil extending between the inner and outer platforms, and a first sealing flange. The first sealing flange extends out from one of the inner or outer platforms, and includes an arcuate seal surface. The stator vane segment may pivot about the arcuate seal surface to accommodate movement of the stator vane segment.
摘要:
A lamp housing for a surgical lamp having a light exit opening at one end thereof, an access opening disposed on a side opposite from the light exit opening and a cover member for closing the access opening. The cover member is attached to a pivotable spring member located in the interior of the housing. The cover member is held in the access opening through spring action by a flange-type circumferential flange on the inside of an edge surrounding the access opening. The spring member is a leaf spring connected to the cover member and is pivotably hinged to the interior of the lamp housing. By applying external pressure to the cover member, the cover member is inserted into the housing and shifted along the interior of the lamp housing by a swivel motion to the extent that access, for example, for changing the bulb, without difficulty.