Carl Stahl Kromer 7228 Serie Instrucciones De Empleo página 34

Operating Instructions
Equipment characteristic values
Ident. Number
7228 0000 01
7228 0000 02
7228 0000 03
7228 0000 04
7228 0000 05
Field of application
The type 7228 zero gravity balancer is used for relieving the
weight of hand-held tools such as drills, thread cutters,
screwers, and for relieving the weight of feed lines such as
cables and hoses.
General
Using the type 7228 zero gravity balancer makes using
hand-operated tools much easier. The retraction forces
remain nearly constant over the whole cable extension
length.
The zero gravity balancer load range differs depending on
the design, as per the nameplate (1).
Equipment elements
(1) Nameplate
(2) Suspension
(3) Anti-fall arrangement
(4) Safety chain
(5) Flexible cable stop buffer
(6) Cable stop buffer cable clamp
(7) Cable stop for setting the cable length
(8) Ferrule for securing the free cable end
(9) Load setting spring locking device
(10) Load setting spring eyelet
Safety instructions
Any changes to the 7228 and the accessories may only
be carried out with the express written permission of the
manufacturing company.
Safe working with the equipment is only possible if the
operating instructions and safety instructions are read
fully and the information contained in them strictly obser-
ved.
The zero gravity balancer is only to be operated, installed
and serviced by trained and instructed personnel. The
personnel must have been informed about the possible
risks arising during these tasks.
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Load Range (kg)
0.4 – 1.2
1.2 – 2.6
2.6 – 3.8
3.8 – 5.2
5.2 – 6.5
Zero Gravity Balancer, Type 7228
Dead Weight (kg)
1.30
1.40
1.50
1.50
1.50
Dismantling the spring housing is extremely dangerous
and is strictly forbidden.
Only unhook a load when the cable is fully retracted.
Periodically check the zero gravity balancer cable for
damage. The zero gravity balancer must not be operated
with a damaged cable.
The suspension, anti-fall arrangement and safety chain
are to be monitored continuously (15020 Pt. 2). If damage
or wear is detected, the zero gravity balancer is to be
exchanged without delay.
Note that snapping back of the cable in a no-load condi-
tion is very dangerous to people, and will also destroy the
spring. The maximum load stated on the nameplate (1)
must not be exceeded.
The spring must be fully released during maintenance
work – except during cable changing (see "Exchanging
the Spring").
Installation/Commissioning
Before setting up the zero gravity balancer, ensure that the
appliance to which the zero gravity balancer is to be atta-
ched has adequate stability.
Designs with plastic housings must not be placed in the
immediate vicinity of hot-air blowers.
If electrode holders are to be operated with the zero gravity
balancer, the zero gravity balancer is to be suspended insu-
lated because of leakage currents (VDE 0100 § 19 and VDE
0545).
Installation
The zero gravity balancer is fitted with an anti-fall arrange-
ment (3), to prevent any possible falling down of the zero
gravity balancer (as per DIN 15112). In addition, the sup-
plied safety chain (4) must be secured stationary indepen-
dently of the zero gravity balancer suspension. In this
connection, the possible fall distance must be a maximum
of 100 mm. In this connection, please ensure the necessary
stability of the fixed installation.
To guarantee perfect operation, this additional safety device
must not hinder the mobility of the zero gravity balancer in
the work area. The zero gravity balancer must be free to
move so as to be able to swing in the direction of the cable
pull.
A safety chain loaded by a dropped zero gravity balancer
must be exchanged without delay, and the housing repla-
ced with it.
Cable Extension (m)
1.5
1.5
1.5
1.5
1.5