<s>
A	O
helical	B-Algorithm
band	I-Algorithm
actuator	I-Algorithm
,	O
generally	O
known	O
by	O
the	O
trademark	O
Spiralift	B-Algorithm
,	O
is	O
a	O
complex	O
and	O
specialized	O
linear	B-Algorithm
actuator	I-Algorithm
used	O
in	O
stage	O
lifts	O
and	O
material	O
handling	O
lifts	O
.	O
</s>
<s>
Helical	B-Algorithm
band	I-Algorithm
actuators	I-Algorithm
do	O
not	O
suffer	O
from	O
platform	O
drift	O
because	O
they	O
are	O
rigid	O
mechanical	O
devices	O
.	O
</s>
<s>
Traveling	O
nut	O
screw	O
jacks	O
and	O
rigid	B-Algorithm
chain	I-Algorithm
actuators	I-Algorithm
can	O
also	O
be	O
effective	O
at	O
addressing	O
these	O
issues	O
with	O
hydraulic	O
jacks	O
,	O
and	O
are	O
also	O
used	O
for	O
stage	O
lifts	O
.	O
</s>
<s>
The	O
vertical	O
band	O
spirals	O
up	O
on	O
itself	O
into	O
a	O
stacked	O
helix	B-Application
,	O
forming	O
the	O
wall	O
of	O
the	O
column	O
,	O
while	O
at	O
the	O
same	O
time	O
,	O
the	O
horizontal	O
band	O
interlocks	O
the	O
continuous	O
spiral	O
seam	O
of	O
the	O
vertical	O
band	O
.	O
</s>
<s>
To	O
incorporate	O
the	O
device	O
into	O
a	O
lift	O
system	O
,	O
multiple	O
helical	B-Algorithm
band	I-Algorithm
actuators	I-Algorithm
are	O
arranged	O
below	O
the	O
lift	O
platform	O
where	O
they	O
are	O
powered	O
by	O
an	O
electric	O
motor(s )	O
and	O
synchronized	O
transmission	O
.	O
</s>
<s>
Helical	B-Algorithm
band	I-Algorithm
actuators	I-Algorithm
require	O
a	O
separate	O
lateral	O
support	O
mechanism	O
,	O
usually	O
provided	O
in	O
the	O
form	O
of	O
guide	O
rails	O
or	O
self-guiding	O
frame	O
,	O
such	O
as	O
a	O
pantograph	O
(	O
e.g.	O
</s>
