Efka AB620A5035 - 6.3 Transmission Ratio; 6.4 Selection of Functional Sequences (Thread Trimming Operations); 6.5 Functions of the Keys Inputs in1...in7; 6.6 Positioning speed

- AB620A5035
- 18 -
6.3 Transmission Ratio
NOTE
The transmission ratio must always be input if no transmission ratio of 1:1 exists, because only motors with
integrated incremental transmitters 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
Parameters
Transmission ratio between motor shaft and machine shaft
(trr)
272
The transmission ratio can be selected within a range of 150...40000 using parameter 272.
Example: With a motor pulley diameter of 40 mm and a sewing machine head pulley diameter of
80 mm the value 500 can be calculated using the formula below.
If the value 2000 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 1000
Machine pulley diameter
6.4 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.
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.
You will find a summary of the modes that can be set and the corresponding machines and adapter cords, to
include available output signals in the List of Parameters chapter: Table of adapter cords.
Further information see chapter "Timing Diagrams" for the various modes.
6.5 Functions of the Keys Inputs in1...in7
The function that is started when a button or switch connected to one of the inputs in1 to in7 is actuated can be
selected using parameters 240...246.
The possible functions are listed in the section "Parameter list".
6.6 Positioning speed
Function with or without control panel
Parameters
Positioning speed
(n1)
110
The positioning speed can be set using parameter 110 on the control within a range of 70...390 RPM.