Storage feed wheel settings

SFOINIT / SFOI (tabs)

Basic setting for each feed wheel group.

The basic settings will be called-up when starting the knitting program ("SFOINIT" command) and will be active until they are overwritten by values of the SFOI table.

Explanation

Group

Number of the feed wheel group

Quantity of feed wheel groups:
1 – 6 (serial, connected using EFS kit (ID 268 338))
1-100 (CAN, connected using CAN-Gateway)

Group 0
Basic setting, if no values were entered for a group.

If no basic setting was defined for a feed wheel group, the values of the "Group 0" will be effective.
(Default: 4.0 cN for all tensions and 8 windings)

Tip: If only one feed wheel group is used in a knitting program, you can work with the "Group 0". This has the advantage that you do not need to adjust anything in the "SFOI" tab.

Working [cN]


Working Tension
Yarn tension, when the machine is producing (engaging rod up).
No yarn is taken-up in the carriage reversal.

Value range:
EFS: 0.5 cN - 40 cN
ULTRAFEED: 0.2 – 99.5 cN

Reduced [cN]


Reduced Tension
Yarn tension when the machine is idle (engaging rod down).

Normally, the reduced yarn tension is about 0.4 cN higher than the knitting or the reciprocation tension.

Value range:
EFS: 0.5 cN - 40 cN
ULTRAFEED: 0.2 – 99.5 cN

Reciprocation [cN]


Reciprocation Tension

The yarn tension is maintained constant:

  • when moving the yarn carrier back and forth and also during a yarn carrier run with overrun path
  • during the carriage reversal

Value range:
EFS: 0.5 cN - 40 cN
ULTRAFEED: 0.2 – 99.5 cN

Operating Mode

Select the operating mode with its specified yarn tension.

  • Reduced Tension
    Only the value from the Reduced [cN] column is used.
  • Reciprocation
    The values from the Reciprocation [cN] and Reduced [cN] columns are used.
  • Working Tension
    The values from the Working [cN] and Reduced [cN] columns are used.

Working Tension

  • During the production (engaging rod up) the feed wheel regulates the yarn tension.
  • No yarn is taken-up in the carriage reversal.

Reduced Tension

When the machine stops (engaging rod down), the reduced yarn tension is active.

Normally, the reduced yarn tension is about 0.4 cN higher than the knitting or the reciprocation tension.
When the machine starts, a small yarn loop results - the yarn tension is reduced. To compensate this, the reduced yarn tension will be increased somewhat.

At the feed wheel, the "Reduced" symbol is only displayed if the reduced and the working yarn tension have different values.

Reciprocation

The operating mode "Reciprocation" was developed specifically for the flat knitting machine.

The yarn tension is maintained constant:

  • when moving the yarn carrier back and forth and also during a yarn carrier run with overrun path
  • during the carriage reversal

In the carriage reversal, the yarn length that is not needed will be restored by the feed wheel.
Yarn tensioning path: max. 600 mm (EFS 820: 200 mm)

You can adjust the reciprocation tension in the REC% column.

Special case: Elastic yarns (e.g. Lycra)
If the yarn breaks in the carriage reversal, select the "Working" operating mode.

Windings

Display of the quantity of yarn windings that are wound around the yarn wheel.

Value range 1 – 40
Default 8

The number of yarn windings are entered directly on the feed wheel (Mode 61).
When threading-up the feed wheel, the yarn is wound around the yarn wheel as many times as you specified.

If you want to change the number of windings, enter it directly on the feed wheel (Mode 61). Then, thread-up the feed wheel again.

REC%

Only active with the "Reciprocation" operating mode.

Yarn tension return correction for the yarn tension.
The yarn tension for taking-up can be adjusted as a percentage of the reciprocation tension.

Value range:
EFS: 0 - 200 %
ULTRAFEED: 20 – 150 %

Default 111 %

Increase the value with a heavy yarn to compensate the inertia of the yarn.

With a fine, sensitive yarn reduce the value so that the yarn does not break when accelerating.

Adjust the yarn tension return correction:

  • with CAN connection using the Setup menu on the knitting machine
    (Do not set the value on the feed wheel, as the setup menu on the knitting machine would overwrite this value.)

With serial connection:
EFS: At the feed wheel call up the "Set up -> Mode 8" menu.
ULTRAFEED: Serial connection not possible, only CAN connection possible.

PREC

Permanent take-up function
The take-up function prevents yarns from sagging after a machine stop.

Value range 0 - 1
Default 0

0 = The feed wheel works with the specified operating mode (Working Tension, Reduced Tension, Reciprocation).

1 = The feed wheel always works with the "Reciprocation" operating mode.

With a machine stop the feed wheel changes to the "Reduced Tension" operating mode by default.

If one is working on the machine, threads can be pulled by mistake - the yarn will be sagging. If the machine is started then, it can lead to an error.

Remedy: Activate the take-up function ("1").
Disadvantage: The feed wheel always works in the "Reciprocation" operating mode and may get hot.

Adjust the take-up function:

  • with CAN connection using the Setup menu on the knitting machine
    (Do not set the value on the feed wheel, as the setup menu on the knitting machine would overwrite this value.)

With serial connection:
EFS: At the feed wheel call up the "Set up -> Mode 12" menu.
ULTRAFEED: Serial connection not possible, only CAN connection possible.