Tightening Programs; Definition: Target, Monitoring, Additional Function - Bosch rexroth Nexo Manual

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9.7

Tightening programs

Use this menu item to create and edit tightening programs.
9.7.1

Definition: Target, monitoring, additional function

In the tightening steps, a distinction is made between target, monitoring, and additional functions.
9.7.1.1 Target function
The target function is the relevant control function within a tightening step (e. g. torque with torque-
controlled tightening processes). The tightening step is ended once the target parameter (= set value)
has been reached. In addition to the constantly activated 1st target function, it is also possible to activate
a 2nd target function. If two target functions are activated, the target function that is the first one to be
reached will end the tightening step.
9.7.1.2 Monitoring function
One or more monitoring functions can be activated within a tightening step. They "watch" the tightening
process in the tightening step. The monitoring parameters (=limit(s) of the monitoring function) are the
basis for tightening step evaluation. It is possible to define monitoring parameters with an upper and a
lower limit value (e.g. M+ and M–), but also with only one limit value (e.g. time)
A distinction is made between evaluating and switching monitoring functions.
Evaluating monitoring functions
With evaluating monitoring functions, achieved tightening results (e. g. torque, angle of turn) are
compared to all monitoring functions assigned to the tightening step at the end of the tightening step. The
tightening step is evaluated as OK if the actual values of all monitoring functions are within the specified
monitoring parameters. The tightening step is evaluated as NOK if one or more limits have been
exceeded. Limit violations occur in the following cases:
•
•
Switching monitoring functions
Switching monitoring functions always contain an evaluating function. Additionally, they end the
tightening step prematurely (i.e. before reaching the target function) as NOK if a monitoring parameter is
violated.
The pertinent checkbox (Standard tightening step  Monitoring
whether a monitoring function is evaluating or switching.
9.7.1.3 Additional function
Additional functions influence the tightening process (e. g. start-up suppression, speed setting) but
cannot interrupt it. They do not carry out an OK/NOK evaluation.
Upper limit: Actual value  monitoring parameter
Lower limit: Actual value  monitoring parameter
(see page 205)
Nexo cordless Wi-Fi nutrunner | 3 608 870 A47/2019-
3 608 870 A47
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