BLDC controlled selvedge yarn feed on wide weaving machines
At the ITMA 2019 in Barcelona we presented for the first time a selvedge yarn feed system with the BLDC control suitable for wide looms.
When weaving dense fabrics, the selvedge areas of the fabric may be looser than the rest of the fabric. This result is a selvedge waviness, also known as floppy selvedge.
The wider the fabrics are produced, the more pronounced the waviness becomes. Due to the wavy selvedges of the fabric it is difficult to process such fabrics because the edges cannot be held with the same tension as the rest of the fabric.
These fabrics are often coated in a second phase. The wavy selvedges also have a negative effect during coating process. Due to the loose edges a uniform coating of the fabric is almost impossible.
The new BLDC control for yarn feed systems on wide looms increases the precision of the yarn tension and opens up new perspectives in regard to controllability and error avoidance.
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