Sobetra MechWorks

How to get a modified sinusoidal profile :

The modified sinusoidal acceleration profile combines the advantages of different motion curves to achieve smoother and more efficient machine movements.

By combining two sinusoidal waves with different frequencies, this motion law keeps the smoothness of cycloidal motion while reducing peak acceleration.

Another key benefit is that the maximum velocity is lower than in both cycloidal and modified trapezoidal profiles, helping reduce mechanical stress and improving overall machine stability.

In practice, the curve is built by combining:

- the first and last parts of a high-frequency sine wave.
- the central portion of a low-frequency sine wave.

The result is a motion profile that offers smooth transitions, controlled acceleration, and improved machine performance.

Cam Index Drives: Precision Motion in Industrial Machines

In machine design, indexing is the repeated movement of a component from one precise position to another, typically in linear or rotary motion.

Cam-driven indexing systems allow machines to start and stop at exact positions, ensuring high precision and repeatability.

Thanks to the rolling contact between the cam and cam followers, these mechanisms provide smooth motion, high load capacity, high speed capability and very low maintenance.

An indexing cycle consists of two phases:
INDEX – the movement phase

DWELL – the stop phase

During the movement, the motion follows three stages: acceleration, peak velocity and deceleration.

To control these transitions, several motion profiles exist such as Cycloidal, Modified Trapezoidal and Modified Sine.

The Modified Sine profile is the most commonly used because it ensures smooth motion and stable power demand.

When a constant speed phase is required, the Modified Sine Constant Velocity (MSC) profile is used.

Maintenance and Productivity,

Maintenance performance should not be managed reactively it should be measured, analysed, and continuously improved.

Three key indicators help us achieve this: MTBF, MTTR, and Availability.

MTBF (Mean Time Between Failures) measures equipment reliability.
It tells us how long a machine operates before experiencing a breakdown. A higher MTBF means fewer unexpected failures, greater operational stability, and reduced production disruptions.

Improving MTBF is about preventing problems before they occur.

MTTR (Mean Time To Repair) measures maintenance efficiency.
It represents the average time required to restore equipment after a failure. A lower MTTR means faster recovery, reduced downtime, and less impact on production schedules. Improving MTTR is about responsiveness, organization, and technical expertise.

Availability combines both reliability and repair performance.
It shows the percentage of time equipment is actually running and creating value. High availability reflects a balanced system where failures are infrequent and recovery is fast.

Together, these indicators provide a clear picture of operational performance:
- MTBF reduces the frequency of interruptions.
- MTTR reduces the duration of interruptions.
- Availability reflects the real production impact.

By monitoring these KPIs, maintenance becomes more than a support function it
becomes a strategic lever for competitiveness, cost control, and operational excellence.

The ultimate objective is simple:
maximize production time, minimize losses, and continuously improve equipment
performance.

In precision mechanical systems, small deviations can create major production impacts.

Our approach combines technical expertise with performance indicators to ensure reliability,
reduce mechanical wear, and safeguard positioning accuracy over time.
We don’t just intervene we secure mechanical performance.

Repairing is reacting.

Driving performance is anticipating.

That’s the approach we bring to our clients!

40 Years of Cam Indexing Expertise

For four decades, Sobetra MechWorks has been dedicated to cam indexing systems.
Since 1986, we have supported our customers with complete solutions from application calculation to sales and long-term maintenance.

As a trusted partner for leading brands such as CAMCO Ferguson, we combine technical expertise with industrial experience to deliver reliable, high-performance cam drive solutions for demanding applications.

40 years of motion control expertise.
40 years specialized in cam drive systems.

Season’s Greetings & amp; Best Wishes
As the year comes to an end, we would like to sincerely thank you for your trust,
collaboration, and support throughout the year.

Clients and partners, you are at the heart of our projects and our growth.

We wish you a wonderful holiday season filled with warmth and joy, and a new year full of
success, opportunities, and shared achievements.

✨ Merry Christmas and a Happy New Year! ✨

The Sobetra Team

Did you know? Indexers are everywhere in everyday life!
We rarely talk about them… but they’re essential inside countless machines that produce what you use daily.

👉 Bottle filling
👉 Medication packaging
👉 Automotive assembly
👉 Sorting & dosing
👉 Food packaging

Behind every precise movement, there’s a mechanical indexer.
And at Sobetra MechWorks, that has been our specialty for 80 years.

Precision is what keeps the industrial world moving.

🎉 100 Years of Expertise — and 40 Years of Collaboration!

Cone Drive, a global leader in precision motion control solutions and high-performance gearing systems, celebrates this year a century of innovation and engineering excellence.

At Sobetra MechWorks, we are proud to be their European distributor and trusted partner for nearly 40 years, representing Cone Drive products across Europe with the same commitment to quality and precision that unites our two companies.

Over the decades, our partnership has grown stronger around shared values:
🔹 Technical excellence
🔹 Reliability and performance
🔹 Continuous innovation for our clients

As the official European distributor, Sobetra MechWorks continues to deliver top-level service, recognized technical expertise, and long-term support — reflecting the strength of a collaboration that truly stands the test of time.

Congratulations to Cone Drive on 100 years of excellence — and here’s to many more years of success and innovation ahead!

This week, our team successfully carried out an emergency rescue operation on a very old Korean indexer for a client whose production line had come to a complete stop.

Severe wear had led to the failure of the cam followers turret, and sourcing original spare parts was no longer possible.

Thanks to our expertise and reactivity, the turret was urgently repaired, and equivalent cam followers were sourced and installed.

Once the parts were received, the indexer was fully reassembled and is now back in operation for testing.

At Sobetra MechWorks, we’re proud to keep your production running — even when time and parts supply are against you.

Send a message to learn more