6
4. Fitting
a)
Installation
(see illustration)
Caution!
Only ever connect or disconnect electrical components when they are voltage-free.
1) Push
drive (2) into mounting (1)
and fasten it there using
BEK bolt (3)
and
secure with
security clip (4)
.
2) Now
fasten stroke pipe clevis (5)
with
BEK bolt (8)
and
security clip (9)
onto
mounting (7)
.
3) Now connect the drive to the
control unit
.
Secure cable (6) to
DewertOkin
prevent it from being pulled out
(please also refer to the Installation Instructions
supplied with the
control units).
DewertOkin
Recommendation:
Please bear in mind that installing mechanical limit
stops into your end product considerably increases
the safety standard.
Attention!
Ÿ
For technical reasons or to save costs, mechanical limit stops are not
always provided. In safety-critical drives we therefore recommend
using an additional safety limit switch which in the event of a defective
top limit switch protects against dangerous excess travel and failure.
The safety limit switch puts the drive permanently out of action as soon
as any over-shooting of the regular limit switch takes place. The safety
limit switch is integrated directly into the drive and does not require any
additional fitting. However this can increase the fitting dimension of the
drive by 23 mm.
Ÿ
In conjunction with the
release
(
“GQR“, „ER“ versions
), it is absolutely
imperative that mechanical limit stops are installed in your end product
at the
top and bottom end-of-travel positions
, in order to prevent
mechanical damage to the drive system.
Ÿ
The mechanical end stops and/or stroke travel limits of the application
must
be set to the dimensions of the extended and retracted positions
of the actuator. Ensure that the mechanical end stops
are not
reached
before
the actuator is completely extended or retracted.
Ÿ
The version of the
MEGAMAT 4
drive system with loose nut seat
requires
a fixed mechanical stop in the end product in order to prevent
the stroke tube from being pulled
out. This could otherwise damage the
drive system.
7
>=1°
b)
Recommended installation position of the
MEGAMAT 4 with GQR (quick release)
Installation errors - e.g. as a result of tolerances in the fitting - can have a considerable effect
on the disengagement forces of the GQR. Incorrect installation can bringt about a significant
increase in the disengagement forces, thereby causing them to considerably exceed the
specification.
Justify the fitting
The retainer for accepting the fittings of clevises
must be in justify
with each other
. If this
is not the case, additional lateral forces act on the drive unit. A significant increase in the
withdrawal forces can occur as a result of the fittings being misaligned by 1° and more. A
fitting position of almost 0° is ideal.
Effects of the fitting position
The disengagement force increases, and can exceed the specification quite considerably, if
for e.g., the drive unit is subjected to a shear force from other attachments.
Illustration
: a horizontally fitted drive unit subjected to a shear force.
MEGAMAT 4
03/2020
ID 59400 9.0
03/2020
ID 59400 9.0
