Torque controller under screwdriver
Torque measurement
Simply measure the torque under industrial screwing machines
Measuring the unscrewing torque of packaged sample caps can reach limitations.
Checking the tightening torque, verified directly under the screwdriver, is useful in the following cases:
- Know the real value of the static torque applied to the products to be screwed
- Check the repeatability of the screwing machines
- Provide additional information to diagnose the various problems of your packaged products (sealing, screwing, etc..)
- Check that the unscrewing torque problems are not related to the machine
- Collect preventive maintenance and process control data
Data sheet Torque controller under screwdriver
Description
The torque controller for screwdrivers is a measurement system designed to be positioned directly beneath the industrial screwdriver, between the screwdriver tool and the product being assembled. It measures in real time the actual static torque transmitted to the workpiece, regardless of the screwdriver’s own readings—which can vary due to tool wear or load fluctuations.
Unlike torque meters, which measure the torque required to unscrew a cap after tightening, the screwdriver-mounted torque controller measures torque at the exact moment of tightening, under actual production conditions. This is the most reliable method for calibrating a screwdriver, detecting torque drift, and validating a screwdriving process in accordance with quality requirements.
The ACRN system consists of a rugged, self-stabilizing static torque sensor (with a range of 0.5 to 25 N·m), a standard ¼-inch female square drive, and an XA-m readout console with a digital display, memory, and data output.
Why measure torque directly at the screwdriver?
In an industrial capping process, the screwdriver displays a target torque value.
However, this pair is not always the one that is actually transmitted to the plug. Friction losses within the tool, wear on the bits, variations in product viscosity, or the geometry of the cap can cause significant discrepancies between the displayed torque and the actual torque. These discrepancies often go unnoticed until they lead to problems on the production floor: leaks, caps that won’t open, and non-conformities during outgoing quality control.
The ACRN screwdriver torque controller eliminates this uncertainty by measuring torque directly at the tool-workpiece interface, with an accuracy of 0.1% of full scale and a sampling rate of 5,000 Hz. This temporal resolution makes it possible to capture dynamic torque spikes that are invisible to the naked eye, which are often the cause of screw-driving defects on high-speed lines.
System description
Measurement console XA-m
Embedded sensor with a capacity from 0.5 to 25 N.m
Upper standard drive with female
Base with hole drilling
Central body of the sensor casing
Dimensions for female square:
Possible adaptations for the top drive of the srewing machine:
-Other dimension of squares
-End caps
-Dummy caps
Possible adaptations fot the plinth:
Customized base for adaptation of buckets or specific dimensions.
Applications and Industries
The torque controller for screwdrivers is used in all industrial sectors where automatic or semi-automatic screwdrivers are used for capping, screwing, or assembly operations:
Cosmetics and Fragrances
Qualification of capping machines on packaging lines for perfumes, creams, and skincare products. Checking the tightening torque ensures that the bottle is sealed and that the torque specifications defined in the technical specifications are met.
Pharmaceutical
Verification of the torque applied to child-resistant caps, syrup bottles, and primary packaging. Measurement traceability is compatible with GMP requirements and quality document management systems.
Agri-food
Inspection of capping machines on filling lines for jars, bottles, and food containers. Insufficient torque can lead to leaks or contamination; excessive torque can damage the cap or make it difficult to open.
Automotive and Assembly
Verification of the repeatability of pneumatic or electric screwdrivers on assembly lines, either as a supplement to or in place of periodic checks using a torque wrench.
Options and accessories
| Printer |
| Extended wires |
| Additional sensors |
| Dummy caps |
| Drive adapters |
Also worth checking out :
- The XA Measurement Console — The console included with the system is compatible with all ACRN sensors for displaying, storing, and exporting torque data.
- The Vortex-DV Motorized Torque Meter — for torque removal measurements and capping tests in the laboratory with speed control.
- Ours electronic torque meter — for testing the opening and closing torque of caps during incoming or outgoing quality control.
- Our Calibration Service —for the periodic metrological verification of the onboard torque sensor.
Information complémentaires
| Type of sensor | Self-stabilizing reinforced static torque sensor |
|---|---|
| Capacity (N.m) | 0.5/ 1/ 3/ 5/ 10/ 25 |
| Units | N.m / lbf.inch / N.cm / Kgf.cm |
| Dimensions | See outline below |
| Weight (sensor kit) | 700g |
| Sampling rate | 5 000 Hz |
| Accuracy | 0.1 % FS |
| Resolution | 0.001 N.m |
| Autodiagnostic | Sensor offset indicator |
| Safe overload | 150 % |
| Standard drive | Female square ¼’’ |
| Power supply | 220 V / 50-60 Hz |
