Both pattern wheels and chain links are ground to suit the pattern requirements of a specific fabric. When a new pattern is required, it is necessary to assemble a new pattern chain and prepare a new set of pattern wheels.
To overcome this problem, the Karl Mayer EL system uses a separate linear motor to directly shog each guide bar. The sensitive shogging movement is built-up in 1/100 mm increments by the patterning computer. Mechanical movement, and therefore inertia, is reduced, resulting in 30 per cent higher production speeds compared to those with profiled chain links. Direct drive of the guide bar by linear drive enables a 12 needle shog in E 28 gauge to be obtained, and the length of the pattern repeat no longer limits the machine speed.
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