Formerly Emhart Teknologies & Infastech

Control Strategy: Options to Fit Production and Product Requirements

Take control of your assembly process - Performance from Simple Error-Proofing to advanced capabilities to Production Line Control and Management 
• Controls QPM Tools to 2000 Nm
• Connectivity Options Include 24V I/O, USB, Ethernet, Serial and Fieldbus
• Alpha Toolbox Software Enables Configuration, Reports and Traces QB controller with 256 jobs available

Strategies

Each strategy consists of a complete set of parameters to control and/or audit torque, angle, time, speed, and power. Each strategy may advance to the next, invisible to the operator, or pause the tool briefly to manage direction changes, multiple spindle synchronization, or relaxation and crosstalk effects.

 

Smart Steps and Advance features to use with the strategies on our QB controllers

Wobble – creates a Smart Step with an AC/TM strategy that rotates the fastener in the opposite direction as the Audit step is programmed to overcome wobble. The fastener threads align with the locking device threads before standard forward rotation and high speed are applied (prevents cross-threads).

Slow Seek – allows slow rotation of socket to allow the flats on the socket to meet up with / engage the flats on the fastener / nut before full rotation and fastening.  When selected will be after Wobble, if no Wobble will be first, and before Self-Tap.

Self Tap – allows the tool to compensate for high prevailing torque applications before final tightening.  When selected will be after Slow Seek and before final Torque step.

Condition Fastener – creates two Smart Steps before the Audit step. The first step is a TC/AM strategy that rotates the fastener in the same direction as the Audit step is programmed. This runs a fastener down to an initial torque level. The second is a Back off strategy which partially removes the fastener. The purpose of this procedure is to polish the threads and reduce friction variation during the Audit step. This ensures more consistent results.

Pre-Torque – runs the fastener to a preliminary torque level and suspends the fastening cycle for a period of time. After a time delay, the Audit step begins. Creates a Smart Step with a TC/AM strategy in the same direction as the Audit step is programmed.

Torque Recovery – allows another fastening rundown attempt on the same joint if torque is not achieved during audit step rundown. It creates a time delayed TC/AM Strategy step AFTER the Audit step and will make the Torque Recovery step the Audit step. The torque parameters of the Torque Recovery step are the same as the Audit step. If the achieved angle in the Torque Recovery step exceeds the Rotation Threshold the torque and angle values displayed and saved are the final torque and final angle of the Torque Recovery step. If the achieved angle in the Torque Recovery step does not exceed the Rotation Threshold in the Torque Recovery step, the torque and angle values displayed and saved are the final torque and final angle of the Audit step.

Backout Fastener – allows assembly procedures requiring partial removal of the fastener before additional components can be added to the joint. Creates a Back off strategy Smart Step after the Audit step. The tool stops after achieving either the angle or torque target.

Fastener Release – allows in some fastening situations, where sockets become stuck on the fasteners. This step reverses the tool and releases the socket without loosening the fastener. Creates an (AC/TC) strategy Smart Step that rotates the fastener in the opposite direction of the Audit step.

Prevailing torque monitoring  Prevailing torque is the torque the tool has to overcome during the running up the threads stage of the rundown. The torque required to run a nut down a thread on certain types of nuts designed to resist vibration loosening. The resistance can be provided by a plastic insert or a noncircular head.

Redundant Transducer  ENABLE or DISABLE the redundant transducer to check the primary transducer’s operation. This can be used to verify operation of the standard primary transducer monitoring circuit and provide a fault if the comparison of the two readings fall outside specified parameters. This parameter is only available when a tool with a redundant transducer is attached. When enabled the controller compares the redundant transducer’s signal to the primary transducer’s signal continuously during a fastening cycle. If the difference in the values exceeds the Tolerance the controller stops the tool with a shutoff code of T1 ≠T2.

Manual Downshift  Manual = human determines parameters and controller calculates parameters. In either case the end result is the same Reduces the tool speed to a specific value (Downshift Speed) when a specific torque value (Downshift Torque) is reached during the fastening cycle. Speed units are RPM, torque is in torque units.

Adaptive Tightening Control  Enables the Adaptive Tightening Control algorithm to slow the tool’s speed as the torque rises. The default values can be modified for when the algorithm starts (ATC Starting Torque), when it ends (ATC Ending Torque) and the tool speed after the algorithm ends (ATC Ending Speed). The torque units are a percent of Target Torque. The speed values are a percent of Speed.

ATCSTANLEY’s patented Adaptive Tightening Control technology gives more consistent torque results by automatically adjusting for different joint rates. Pneumatic and other DC electric tools require either operator-dependent parameter selection or additional tools to get consistent torque results. ATC also provides cycle time reductions. Extended gear life, and improved ergonomics.

Adaptive Tightening Control Plus  Enables the Adaptive Tightening Control Plus algorithm to slow the tool’s speed based on a sampled torque rate. The default values can be modified for when the algorithm starts monitoring rate (Threshold Low), when it stops monitoring rate (Threshold High) and the tool speed after the algorithm ends (Minimum Speed). The torque units are a percent of Target Torque. The speed values are a percent of maximum speed of the tool.