Instruction manual

EFKA AB221A/AB321A + AB222A/AB322A (BA)
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8.3 Transmission Ratio
Note
The transmission ratio must always be input, because only motors with integrated incremental transmitter will be used.
The transmission ratio should be determined and set as precisely as possible!
The transmission ratio between motor shaft and shaft of the sewing machine head must be input, so that the set speeds of
parameters 110...117 correspond to the sewing speeds.
Function with or without control panel Parameter
Transmission ratio between motor shaft and machine shaft (trr) 272
The transmission ratio can be selected within a range of 020...9999 using parameter 272.
Example: With a motor pulley diameter of 40mm and a sewing machine head pulley diameter of 80mm the value 50
can be calculated using the formula below. If the value 200 has been selected in parameter 272, it follows
that the motor pulley is double the size of the sewing machine head pulley.
Motor pulley diameter
Value of parameter 272 = ------------------------------------ x 100
Machine pulley diameter
8.4 Selection of Functional Sequences (Thread Trimming Operations)
This drive is suitable for different lockstitch, chainstitch and overlock machines. The mode for the functional sequence
required on the respective machine can be selected using parameter 290.
You will find in List of Parameters chapter “Table of Adapter Cords” a summary of the modes that can be set and the
corresponding machines and adapter cords, to include available output signals.
Mode 0 Lockstitch Machines
- Thread trimmer from leading to trailing edge of slot position 1
- Thread trimmer from trailing edge of slot position 1 to leading edge of slot position 2
- Thread trimmer from leading edge of slot position 1 to leading edge of slot position 2
- Thread wiper for a programmable time (t6)
- Sewing foot lifting (see chapter "Sewing Foot Lifting")
- Backtacking (see chapter "Start Backtack" and "End Backtack")
- Signal “machine running”
- High lift for walking foot/flip-flop at limited speed after pressing the key
Mode 2 Lockstitch Machines (Singer 212 UTT)
- Thread trimmer for a programmable time (kt2) after intermediate stop in position 1
- Thread trimmer from leading edge of slot position 1 to leading edge of slot position 2
- Sewing foot lifting (see chapter "Sewing Foot Lifting")
- Backtacking (see chapter "Start Backtack" and "End Backtack")
- Signal “machine running”
- High lift for walking foot/flip-flop at limited speed after pressing the key
Mode 3 Lockstitch Machines with Thread Trimming System (e. g. Dürkopp Adler)
- Thread trimmer for programmable increments (iFA) after intermediate stop in position 1
- Thread tension release from trailing edge of slot position 2 after delay (FSE) during ON period (FSA)
- Thread wiper for a programmable time (t6)
- Sewing foot lifting (see chapter "Sewing Foot Lifting")
- Backtacking (see chapter "Start Backtack" and "End Backtack")
- Signal “machine running”
- High lift for walking foot/flip-flop at limited speed after pressing the key
ATTENTION
Before switching the functional sequences, you must disconnect input and output plug-and-
socket connections between control and machine! Please ensure that the functional sequence
(mode) suitable for the respective machine is selected !
Settings with parameter 290 are possible only after the power is turned On!