Lenze EVS93xx FlyingSaw - Manual (Page 15)

FlyingSaw
Features of the Prepared Solution
 Prepared Solution Servo PLC / ECSxA 1.1 EN page 2-2
2.1 Definition of a flying saw
A flying saw is a slave axis which is synchronised to a moving master axis, e.g. a wood conveyor. In the
simplest case, the slave axis travels in parallel with the master axis (parallel slave), but it can also travel
diagonally to the master axis (diagonal slave axis).
Parallel slave
A parallel slave is an axis which is synchronised from standstill to a master axis travelling with the constant
speed v
m
. The synchronous speed v
FS
is reached at a previously determined position (master slave position,
cutting position).
Diagonal slave axis
Just like a parallel slave axis, a diagonal slave axis is synchronised to a moving master axis. However, the
slave axis moves diagonally to the master axis with an angle of 0°< α ≤ 90°. This means that the diagonal
slave is faster than a parallel slave once it has reached the synchronous position. The speed can be
calculated depending on the angle: v
FS
= v
m
/ sin (α). In the case of a parallel slave, the angle is α = 90°.
In the illustration below, the difference between a "parallel flying saw" and a "diagonal flying saw" is shown.
The relationship between the speeds can be seen in the vector diagram. If the cutting angle is α=90, the
vectors are on top of each other. In this case, the speeds are equal, i.e. the synchronous speed of the flying
saw corresponds to the master speed of the material path. This Prepared Solution only includes the "parallel
flying saw".
Top view of a possible process
Circular saw carriage
i
M
Carriage drive
i M
“Flying saw“ drive
v
Material
v
FS
v
Saw
Circular saw
v
Bahn
v
FS
Circular saw carriage
i
M
Carriage drive
i M
“Flying saw“ drive
v
Material
v
FS
v
Saw
Circular saw
v
Bahn
v
FS
v
Material
v
Saw