Electrode Maintenance - Bosch Rexroth PSI 6 C 761 Serie Typspezifische Anleitung

R911337026 | PSI6xCx.761xx Bosch Rexroth AG 69/89
This input requests the timer to read out the new spot number, to prepare the
corresponding welding program and to set the program-dependent and electrode
dependent timer outputs accordingly. If the timer found the spot in the internal
spot table or if a program was directly selected (0...255), the timer will set the
output "Spot selection taken over".
If no valid spot number has been specified, the base pressure of program 0 will
be output.
Once the robot has detected the "Spot selection taken over" output, it can
evaluate the corresponding outputs of the weld timer. Furthermore, it must reset
the "New spot selection" input.
As a response, the timer will reset the output "Spot selection taken over".
Program start:
The actual program start is initiated by the input "Program Start" of the robot. At
the end of the schedule, the timer will either set the "Weld complete" output, if the
schedule was o.k., or the "Welding fault" output will be set if the schedule was not
o.k., or the "Timer ready" output will be reset if a general fault was present.
When the robot resets the "Program Start" input, the timer will reset the "Weld
complete" output. The fault has to be corrected and reset in the event of an
incorrect schedule.
If the spot number selected during start differs from the one specified together
with the program selection function, the welding sequence will not be started.
Spot numbers lower than 256 will be interpreted as program numbers by the
timer.
7.1.3

Electrode maintenance

The electrode status outputs correspond to the status of the electrode that has
been assigned to the welding program that was activated by spot selection.
The electrode status outputs and the acknowledgement inputs (tip dressing, tip
change) refer to the electrode that has been assigned to the currently selected
program. Acknowledge tip dressing or Acknowledge tip change for electrode 0
applies to all electrodes.
A handshake is also provided for electrode maintenance as a precaution. The
timer signals the electrode status of the current electrode gun using specific
outputs. The robot can influence the internal tip dress and wear counters at any
time using the "Tips have been dressed" and "Electrodes have been replaced"
outputs. In order to enable the robot to safely verify that receipt of these
acknowledgments has been safely detected, the two inputs are looped through
again to the "Tips have been dressed detected" and "Electrodes have been
replaced detected" outputs.
The "End of stepper" output becomes high whenever a stepping cycle is
exceeded.
A group message is output for all electrodes via the electrode status outputs if a
program has been selected to which electrode 0 has been assigned.
A separate log is maintained for the electrode changes.