Inspector Series Controller EDU Series

The INSPECTOR is a PLC based process control system that monitors the fastening assembly process. It compares the actual triggered torque time to a pre-set tolerance, ignoring joints that fall out of the process window. It tracks, in real time, the completion of each screw joint in an assembly, then notifies the operator upon its completion. It keeps a summary of good and incomplete assemblies throughout the production day.

The INSPECTOR is easily programmed with user interface screens on the PLC. Walk through a few simple steps to input the parameters for total number of fasteners required in a completed assembly (1 to 99999) and minimum and maximum screw times and the fastening process can begin. A manual reset is requested from the user acknowledging completion of an assembly or when one of several recognizable process errors occur.

The INSPECTOR indicates an individual joint as complete when the torque achieved time falls within the minimum and maximum times set for a specified joint. An assembly is indicated as complete when all the required screws have been successfully completed. The torque signal received by the INSPECTOR indicates that the pre-set torque level on the driver has been met. In the case of the FAB or RAF series the signal is sent when the clutch on the driver engages. For the PLUTO driver, the signal is sent by the electronic torque control circuitry in the EDU1AE controller.

At the end of a job the INSPECTOR will indicate the number of completed assemblies, confirming all the work is done without error and its safe to move on to the next process step.

• Set up of number of screws for a complete cycle.
• Set up of minimum fastening time in 0,1 sec. steps (to avoid the counting of torque reached signals obtained re-fastening an already tied up screw or fastening screws that stop before reaching the right position).
• Set up of maximum fastening time (to avoid the counting of stripped screws).
• Remote starting and reversing (option).
• Output signals: torque reached, lever, cycle end and alarm (24 V 100mA).
• Display of completed assemblies, total acceptable and rejected Assemblies

The INSPECTOR will give the operator the following information

• A single fastening cycle has been completed when the clutch signal is received within the pre-programmed time window;
• The programmed number of fastening cycles has been carried out successfully and accepted; and
• The display will continuously show the total number of screws done, the number of screws done correctly, the number of screws done incorrectly, and the number of screws still to be done to complete the assembly. An assembly is indicated as complete when all the required screws have been successfully fastened.

• To check that the part to be assembled has been inserted into its nest;
• For depth control rather than torque control;
• Torque and lever signals;
• Remote start;
• Alarm signal to stop the driver and/or external equipment; and
• Run automatic cycle, forward and reverse, with programmable intervals.