Thursday, 24 September 2009

SU Aggregate Pattern Drive for Multibar Warp Knitting Machines

Warp Knitting Machine |Although new generation of multibars warp knitting machines has been released several year ago equipped  with electronic pattern drive used Servo motor such like JL 65/1 F, ML and FL series from Karl Mayer,however existence from old machine type such like
MRPJ 42/1,MRSEJ 73/1 SU and others types which is used SU (summary drive) for the pattern drive are still a lot  for used warp knitting machines.

SU drive (totalizing drive)

The SU drive is electronically driven and thus enables a pattern change in a very short time. The prerequisite is the elaboration of the pattern on a pattern computer. The pattern data is written on a floppy disk in a machine readable format and transferred to the working memory of the knitting machine by means of a loading station.
The SU drive controlled via the machine computer controls the shog movement of the guide bars as follows:
In the controlling unit 6 displacement rollers change the position of single sliding pieces with the pitch 1, 2,4, 8, 16 and 16 which – via combination – enable a total shog movement of up to 47 needles.
The individual displacement rollers are selected by the machine computer and put into operation, their sum
(SU drive) resulting in the shog movement. The maximum needle jump during an underlap is 16 needles.
2 guide bars can be controlled with one controlling unit. There are several kinds of units with 5, 6 or 7 displacement rollers, depending on the respective machine requirements.


  •  fast pattern change
  •  unlimited pattern repeats
  •  fast pattern access
  •  no storage system required as in case of chain links
  •  limited machine speed of 600 min-1
  •  higher purchase costs

please see also :how to repairing SU Aggregate on the next posting.