ROHM RPP / RPP-A 2-jaw parallel gripper - Manual (Page 6)

Safety Precautions and Guidelines for Use
2-jaw parallel grippers
ID 1104573 Operating Manual RPP; RPP-A
Röhm GmbH, Dillingen Works Röhmstr. 6, 89407 Dillingen/Donau, GERMANY, Tel. (49)9071/508-0
Page 6 of 37
I. Qualifications of the operator
Persons with no experience in working with gripping installations are exposed to particular danger due to incorrect
behaviour, particularly during set-up work due to the gripping movements and forces occurring.
Gripping installations may therefore only be operated, adjusted or repaired by persons specifically qualified or
trained for this work, or who have many years of experience in this work.
II. Risk of injury
For technical reasons, this unit may consist partly of sharp-edged individual parts. Particular care must therefore be
taken to avoid injury when working on these parts!
1. Installed energy accumulators
Moving parts preloaded with compression springs, tension springs of other springs or with other elastic elements
represent a hazard potential due to their stored energy. Underestimating this potential can result in serious injuries
due to projectile-like individual parts flying around uncontrolled. This stored energy must be relieved before further
work can be carried out. Gripping installations to be dismantled must therefore be examined for such potential
sources of danger using the corresponding assembly drawings.
If the relief of this stored energy cannot be carried out without danger, the dismantling may only be carried out by
authorised personnel.
2. Calculation of the necessary gripping forces
If this gripping installation is intended to hold or clamp the workpiece against machining forces exerted from the
outside, the machining forces involved in a given machining process must be determined and provided with a safety
allowance commensurate with the calculation method and the machining operation. The gripping installation must
then be able to generate at least the gripping forces calculated in this way.
3. Use of other/further clamping inserts/workpieces
The necessary minimum clamping force must always be determined when using other clamping inserts or
workpieces.
1.Clamping of other/further workpieces
If special clamping sets are provided for this gripping installation (jaws, clamping inserts, systems, alignment
elements, position fixators, tips, etc.), only the workpieces for which the clamping sets were designed may be
clamped in the intended manner using these clamping sets. If this is not observed, insufficient clamping forces or
unfavourable clamping positions may result in material damage or personal injury.
If further or similar workpieces are to be clamped with the same clamping set, written approval must therefore be
obtained from the manufacturer.
4. Gripping force check
Gripping force check (general)
In accordance with standard EN 1550 § 6.2 No. d) for rotating work holding chucks which can also be applied to
stationary clamping installations in this one point, static gripping force measuring instruments should be used to
inspect the maintenance condition at regular intervals in accordance with the maintenance manual. This prescribes
that a gripping force check should be performed after approx. 40 operating hours, irrespective of the clamping
frequency.
If necessary, special clamping force measuring jaws or instruments (load cells) must be used for this.