Atlas Copco EP 7PTX-55 HR10-RE Produktanweisungen Seite 20

Service instructions EN EP7PTX55 HR10-RE
When the free speed has been reduced the number of pulses has increased as
well as the torque level. After a reduction of the free speed the torque level
might have to be reduced.
Type of joint (Hard or Soft)
The tightening time (i.e. the number of pulses per tightening) is depending on
joint hardness. Hard joints gives short and soft joint longer operation time, see
fig.
Max. recommended tightening time is 3 seconds.
Min. recommended number of pulses per tightening is 3.
An increased number of pulses per tightening implies an improved accuracy.
Fewer pulses per tightening implies an increased scatter
Operating area
Max. recommended tightening time is 3 seconds. Longer time indicates that the
joint is too soft for the machine used. If so it is recommended to choose a big-
ger size of machine or another type of nutrunner.
Min. recommended number of pulses per tightening is 3.Few pulses per tighten-
ing at a low setting indicates that the free speed ought to be reduced by the trim
valve.
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