Instruction Manual
- 12 -
6.3 Transmission Ratio
N
OTE
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
6.4 Selection of Functional Sequences (Thread Trimming Operations)
This drive is suitable for different lockstitch machines.
The mode for the functional sequence required on the respective machine can be selected using parameter
290.
A
TTENTION
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 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 machine
(Pfaff model 2235 Premium)
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
Mode 1
Lockstitch Machines with Thread Trimming System
(Pfaff models 2545)
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
Summary of Contents for DC 1550
Page 51: ... PF321A6012 51 For your notes ...
