Foot Control; Stepping Motors; Sewing Unit; Presser Foot Unit - Pfaff performance 2054 Service Manual

57. Foot control

The foot control is a variable resistor whose value is measured by an analogue method.
When not in use, its value is „infinite".
If the foot control is being pressed, the operator is requested to release it.
Press the push-button „Start".
When the operator is requested, the foot control must be pressed or released.
A number which indicates the analogue measurement appears in the display.
Each of the „off" (0) and „max." (> 140) marks must be reached twice; otherwise no OK will be issued.
Press the button „i" =
The current test can be interrupted with the „i" button.
If the „Full test" mode is activated, the next test will be automatically executed after completion of the test.

58. Stepping motors

The stepping motors are grouped together according to function; each group is tested separately.
The stepping motors for the selected group are normalised in succession and moved at their maximum
stroke.
The stepping motors move to the limit positions. The first time they also move to the middle position.
Then they move 2 times at their maximum stroke with max. speed and stop in the middle position.
The individual dialogues are:

Sewing unit:

The zigzag motor and the feed stepping motor don't have a limit switch.
The operator is requested to carry out a visual check.
Press the push-button „Start".
An evaluation window for visual check is displayed after completion of the test.
Please press now the relevant buttons:
either
or
plus
The current test can be interrupted with the „i" button.
If the „Full test" mode is activated, only the next test will be automatically executed after pressing
the „+" or „-" button.

Presser foot unit:

Stepping motor units with limit switch (presser foot unit) have to reach the limit (i.e. position 0 = normal
position) and leave it during operation. Otherwise an error message will be issued.
The status of the limit switches is displayed.
Press the push-button „Start".
An evaluation window
Press the button „i" =
The current test can be interrupted with the „i" button.
If the „Full test" mode is activated, the next test will be automatically executed after completion of the test.
End (end of test with possibility to go to the next test)
button „+" = OK (test was successful)
button „-" = ERROR
button „i" = End (end of test with possibility to go to the next test)
(OK or Error) is displayed after completion of the test.
End (end of test with possibility to go to the next test)
(test was not successful)
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