Carl Stahl Kromer 7230 0000 01 Instrucciones De Empleo página 35

Adjusting the load:
The zero gravity balancer has been set at the factory to
type/model dependent maximum load.
Suspend the load and place a size 17 socket wrench on the
endless screw (9). Turn the wrench in the direction of the "-"
symbol until an exact weight counterbalance of the suspen-
ded working load is obtained.
Do not release the spring tension further than the
type/model dependent minimum load!
Infinitely variable adjustment of the spring force can also be
carried out later within the load range of the zero gravity
balancer (in accordance with the information on the name-
plate (1). The spring force is adjusted for lighter loads by
reducing the initial stress in the direction of the "-" symbol,
heavier ones by turning the spring locking device in the "+"
direction.
The maximum initial tension of the zero gravity balancer is
achieved by X turns of the endless screw (9) in the "+"
direction:
7230/7231 - 01
7230/7231 - 02
7230/7231 - 03
7230/7231 - 04
7230/7231 - 05
7230/7231 - 06
Do not tension the spring further than this maximum
initial tension!
Automatic detent / Type 7231
The automatic detent on type 7231 enables the cable stop
to be locked on reaching any position. To do this, move the
suspended load slowly towards the cable pull until the cable
drum is locked. The cable drum is put back into operation
by jerking the cable out. Adjustment of the automatic detent
is not required.
The automatic detent must not be used for load
changing.
Adjusting the cable length
The zero gravity balancer is delivered from the factory with a
long cable, so that the cable length can be individually adju-
sted to the onsite circumstances. Adjusting the cable length
is done with the cable wedge (7). After lengthening or shor-
tening the cable, the free cable end must be compressed
with the supplied ferrule (8) (or a clamp in accordance with
DIN 3093 Pts. 1 to 3); the projecting cable end must then be
cut off flush.
A minimum distance of 100 mm must be maintained
between the cable clamp (6) and the cable wedge (7).
Cable stop buffer /
Setting the cable extension
The cable stop buffer can be moved simply by moving the
flexible cable stop buffer (5) and the cable clamp (6). The
cable clamp should be secured each time.
The maximum cable extension length must not be
exceeded (even with a cable extension).
X = approx. 9,5
X = approx. 7
X = approx. 7
X = approx. 4,5
X = approx. 4,5
X = approx. 5
Drum lock
The drum lock for types 7230 and 7231 (10) enables the
cable drum to be locked for changing the load or the cable
without loosening the spring. To do this, the pin with the
elongated slot (10) is optionally turned through 90° with a
screwdriver to the left or right.
Ensure that the cable drum is securely locked.
Snapping back of the cable by unlocking the cable
drum is dangerous and can destroy the spring.
After changing the load or the cable suspend the working
load and unlock the cable drum by pressing in the fixing pin
again and then turning it to the right or left to disengage,
until it springs back to the original position.
Servicing / Inspection
The zero gravity balancer is to be regularly serviced. All
external moving parts are to be greased, as well as the fric-
tion points on the suspension and spring hook. Servicing
the cable with a non-acid grease considerably increases its
service life. The suspension and cable are to be monitored
continuously (DIN 15020 Pt. 2). If damage such as broken
strands are detected, the cable and the zero gravity balan-
cer are to be exchanged without delay. Should the cable,
spring or other parts of your zero gravity balancer need to
be replaced, pre-assembled replacement sets can be
purchased from our after-sales service.
Maintenance
The following description refers exclusively to the cable,
spring, cable drum, housing and suspension replacement
part sets pre-assembled by us.
Only original replacement parts are to be used.
Refer to the operating instructions, supplied with every new
device, for exchanging these replacement part sets.
Changing the cable
With this zero gravity balancer it is possible to change the
cable without releasing the spring and without dismantling
the device.
The "cable complete" replacement part set consists of the
cable with a pressedon clamp on the on the cable coupling,
a separately enclosed brass bush, the cable stop buffer
with rubber ball and cable clamp, plus the pre-assembled
cable socket with wedge and a ferrule for pressing onto the
free cable end after adjusting the cable length, supplied
loose.
Pull the cable out of the housing as far as possible. (The
cable coupling is visible in the lower part of the aperture in
the housing.) Lock the cable drum by turning the fixing pin
(pin with elongated slot on the small housing diameter) is
pressed in with a screwdriver and in this position is turned
optionally right or left through 90°.
Ensure that the cable drum is securely locked.
Snapping back of the cable in a no-load condition by
unlocking the cable drum can lead to injuries and
cause the spring to be destroyed.
35