# US 8,464,636 B2 · Device for controlling a sheet-fed rotary printing machine having a plurality of drive motors > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,464,636 B2 - Document ID: US8464636B2 - Status: Granted - Kind: B2 - Application number: 12/253,542 - Filed: 2008-10-17 - Published: 2009-04-23 - Granted: 2013-06-18 - Earliest claimed: 2007-10-17 - Assignees: Heidelberger Druckmaschinen AG - Applicants: Malte Seidler; Detlef Strunk - Inventors: Malte Seidler; Detlef Strunk - Web page: https://patentgrep.com/patent/US8464636B2 ## CPC - B41F 13/0045: {Electric driving devices} - B41F 33/0009: {Central control units} - B41F: PRINTING MACHINES OR PRESSES (manifolding devices or office printing machines B41L) ## Abstract A sheet-fed rotary printing machine includes at least two electric drive motors acting on a gearwheel train which mechanically connects a plurality of printing units to one another. A device for controlling the printing machine includes a control loop for each electric drive motor having a higher-frequency control element. At least one control loop has a low-frequency control element supplying an output signal picked up at the control loops in a predetermined ratio. A sheet-fed rotary printing machine having the device is also provided. ## Claims ### Claim 1 In a sheet-fed rotary printing machine having a plurality of printing units, a gearwheel train mechanically interconnecting the printing units and at least two electric drive motors acting on the gearwheel train, a device for controlling the sheet-fed rotary printing machine, the device comprising: control loops each associated with a respective one of the electric drive motors; each of said control loops having a respective higher-frequency control element; and at least one of said control loops having a low-frequency control element; said low-frequency control element and said higher-frequency control element separating control signals into lower-frequency and higher-frequency components; and said low-frequency control element supplying said lower-frequency component as an output signal picked up at said control loops in a predetermined ratio. ### Claim 2 (depends on 1) The device according to claim 1, wherein said higher-frequency control element is a proportional controller, and said low-frequency control element is an integral controller. ### Claim 3 (depends on 2) The device according to claim 2, which further comprises torque controllers each associated with a respective one of the drive motors, the output signal being a low-frequency output signal of said integral controller allocated to said torque controllers and applied to said torque controllers in said predetermined ratio. ### Claim 4 (depends on 3) The device according to claim 3, wherein said predetermined ratio has a negative sign. ### Claim 5 (depends on 2) The device according to claim 2, wherein said proportional controllers have different amplification factors. ### Claim 6 (depends on 1) The device according to claim 1, which further comprises sensors each associated with a respective one of the drive motors for detecting an actual speed or an actual torque. ### Claim 7 (depends on 1) The device according to claim 1, wherein a predetermined sum torque is allocated as a manipulated variable to the drive motors. ### Claim 8 (depends on 1) The device according to claim 1, which further comprises torque controllers each associated with a respective one of the drive motors, at least one of said torque controllers receiving higher-frequency components multiplied by a negative amplification factor. ### Claim 9 (depends on 8) The device according to claim 8, wherein the amplification factor has a sign dependent on a characteristic form of a vibration of the sheet-fed rotary printing machine at a location of a drive motor. ### Claim 10 (depends on 8) The device according to claim 8, which further comprises an adapted filter receiving a higher-frequency component. ### Claim 11 (depends on 10) The device according to claim 10, wherein said adapted filter is a bandpass filter. ### Claim 12 A sheet-fed rotary printing machine, comprising: a plurality of printing units; a gearwheel train mechanically interconnecting said printing units; at least two electric drive motors acting on said gearwheel train; and a device for controlling the sheet-fed rotary printing machine, the device including control loops each associated with a respective one of said electric drive motors, each of said control loops having a respective higher-frequency control element, and at least one of said control loops having a low-frequency control element; said low-frequency control element and said higher-frequency control element separating control signals into lower-frequency and higher-frequency components: and said low-frequency control element supplying said lower-frequency component as an output signal picked up at said control loops in a predetermined ratio. ### Claim 13 (depends on 12) The sheet-fed rotary printing machine according to claim 12, which further comprises at least one turning device for mechanically coupling a plurality of said printing units to one another. ### Claim 14 (depends on 13) The sheet-fed rotary printing machine according to claim 13, wherein at least one of said drive motors is disposed upstream of said turning device and at least one of said drive motors is disposed downstream of said turning device.