Highlights

• Pattern memory for pattern repeat sizes up to 28 million stitches
• Continued knitting to pattern after power failure
• Interface for real-time actuation of bending transducer modules on all standard machine sizes
• No addressing of bending transducer modules required
• Low power loss on bending transducers
• Minimum cabling costs
• Integrated pulse encoder interface
• Digital inputs and outputs for process I/O, e.g. for releases and fault messages, striper control
• State-of-the-art control architecture
• Extremely compact dimensions.

Область применения

The SITEX CK control system with piezoelectric bending transducer modules for individual needle selection is tailored for use in large circular knitting machines. This compact unit provides functions for pattern preparation. The pattern information is used for bending transducer actuation, process control and visualization.

Дизайн

Once the data for the knitted pattern have been designed with the pattern preparation system, they can be transferred via diskette to the SITEX CK control system, where they are prepared for output to the bending transducer modules.

When the needle cylinder rotates, driven by a SIMOVERT MICROMASTER converter, the bending transducers actuate the needles in accordance with the pattern of the knitted fabric. Various permanently stored pattern repeats are available directly on the controller for pattern changes. The incremental encoder is used to control the SITEX CK system with the actual value of the needle cylinder movement.

A SIMATIC S7-200 PLC processes further auxiliary functions and monitoring functions for the circular knitting machine and defines the setpoint for the drive.

The SITEX S uninterruptible power supply is matched to the energy demand of the bending transducers and the SITEX CK control system to ensure a controlled machine shut-down. SITEX CK increases the productivity of the machine and reduces the reject rate with functions for continued knitting to pattern after a power failure.

The SITEX M piezoelectric bending transducer modules enable low power-loss during operation of the knitting machine, together with low heat dissipation and a long service life.