Ondal ACROBAT 2000 User Manual

82
GB
8 Dismantling / Mounting in Case of Service
1505093, Edition 2012-05, Version 5
Figure 6: Calculating the maximum loading
capacity of the ACROBAT 2000 spring arm
8.2.3 Calculating the maximum loading capacity (payload) of the ACROBAT
2000 spring arm
(See "Figure 6")
Sudden release of spring arm
The spring arm 4 contains a powerful spring. When the end device is
dismantled, the spring arm can suddenly jump up and may cause serious
injury:
• Before removing the end device (e.g. OR lamp), make sure that the
vertical lift of the spring arm 4 as described in
“Chapter 9.4.1” on
page 100
is restricted to the lowermost end stop (horizontal position).
Maximum loading capacity of the spring arm (standard version)
The maximum loading capacity indicated corresponds to the maximum weight which can
be carried by a spring arm. For example, a maximum loading capacity of 21 kg* is indicat-
ed on the rating plate. To check whether the spring arm can bear the actual load of an end
device, the actual load must first be calculated.
The total weight of the adaptation and the end device must not exceed the maximum load-
ing capacity (spring equipment) of the spring arms.
Possible loading capacities (spring equipment versions)
• 1.5 - 3.5kg; 3.5 - 7kg; 7 - 12kg; 9 - 15kg; 12 - 18kg; 13.5 - 21kg.
• The spring equipment mounted is indicated on the rating plate on the top side of the
spring arm 4.
Calculating the actual load
The dead weight of the adaption 7 - 9 mounted and the end device (e.g. OR lamp)
must be subtracted from the maximum loading capacity of 21kg, and the result must be
greater than 0.
* for spring equipment with a loading capacity of up to 21kg. For other spring equipment
versions, the corresponding value must be used.
Configuration example
• Max. loading capacity of the spring arm 4 with spring equipment mounted
= up to 21 kg*,
• dead weight of the VESA adapter 9 = 2.0kg
Calculation of the maximum loading capacity
• Max. loading capacity (payload) = 21kg* – 2.0kg = 19.0kg.
Evaluation
The weight of the end device to be mounted must not exceed 19.0 kg.
Maximum torque
The torque produced on the front joint 1 through the off-centre attachment of a load F
and/or an actuating force F must not exceed 25 Nm.
Calculating the torque
Torque produced through manual force:
This torque is determined from the manual force F (N) and the vertical distance Lx (m).
Torque produced by the end device:
This torque is determined from the force of the weight of the end device F (N) and the
adapter (N) and the horizontal distance Ly (m).
1WARNING

Ondal ACROBAT 2000 Specifications

General

Brand	Ondal
Model	ACROBAT 2000
Category	Medical Equipment
Language	English