Ecotech Machine Tool's primary universal cylindrical grinding machines are made in Italy by the worldwide leading manufacturer, ROBBI. These machines use high-quality components and an internal workshop produces most of the mechanical components used in the machines.
In-Stock Grinding Machine | Omicron 600 ET7
Our variety (Conventional, PNC, & CNC models) of Robbi cylindrical grinding machines, differing in size and productivity, provides you with a grinding machine uniquely suited for your application.
Degree of Precision
In line with international precision norms (ISO 2433), Robbi CNC grinders have a guaranteed deviation and finish. The table movement linearity is guaranteed by a maximum deviation of 0.0002 mm/m.
- Surface finish degree: Ra 0.2 μ
The obtainable grinding roundness is as follows:
- grinding between centers 0.3 μ
- grinding with live spindle 0.4 μ
CNC Cylindrical Grinders
To meet the needs of mass production, these reliable Universal CNC grinding machines were created by the Robbi Group. Using only the most advanced mechanical and electronic systems, this embedded software enables complex grinding cycles in a simple and intuitive way without the need for an advanced macro specialization.
- These machines are equipped with the latest generation of the SIEMENS Control System.
- Leverage better angle management with this CNC machine.
- Optionally, add a third interpolated axis.
- Use for high production or small lots.
- Automatic measurement devices installed.
Additional Customization Options
- Controlled continuously or indexed C and B Axes
- Hydrostatic or electric spindle
- Grinding spindle hydrodynamic
- Moving table
- Movile Mola
- Completely closed fairings
- Robot manipulator connections
- Grinding of curved cylinders and respective measuring cycle
- Rubber cylinder grinding
- Non-circular elements and CAMS rectification
- Diamond dresser with CAD program loaded profile
Semi-Automatic Cylindrical Grinders — PLC
With top-level quality standards and a range of versatility, our Robbi semi-automatic machines allow for the matching of individual or series generated parts in manual or automatic modes. The simplified preset grinding wheel piece provides fast and precise machining of complex components thanks to the probes and optional measuring contact.
The semi-automatic grinding machines Robbi are driven by brushless motors with no use of hydraulic movement driven by a ball screw. Multi-scale electronic flyers perform manual micrometric movements delivering constant speed movements, stiffness, and greater positioning accuracy.
And, the programming is simple, intuitive, and provides many easily learned operations via the touch-screen operator's panel.
Conventional Cylindrical Grinders
Flexible with top precision levels and an automatic zero stop, these conventional machines allow for fast setup times and are ideal for processing components with tight tolerances. These study and stable machines have a machine bed in normalized cast iron and have a grinding wheel spindle mounted on solid bronze brushes.
- Main handwheel with a division of .01 mm on the diameter
- Micrometric handwheel with a division of 0.001 mm on the diameter
These machines also include the following systems
- 2 axis digital readout (SPACE 2000)
- For wheelhead micropositioning: Incremental linear encoder
- For table micropositioning: Incremental linear encoder
The touch screen panel settings allow for workhead and wheelhead speeds, some parameters of the automatic cycle including dwell time at the reverse and the number of spark-out passes.
Frequently Asked Questions
What are the main types of Robbi cylindrical grinding machines available?
The product line comprises three primary configurations: conventional, semi-automatic (PLC), and CNC models. Conventional machines prioritize flexibility and fast setup for tight tolerances, while semi-automatic versions offer versatility for individual parts or series. CNC models are engineered for mass production and complex geometries, utilizing advanced Siemens control systems and intuitive software to manage high-volume output.
What is the precision and surface finish quality of these grinding machines?
Robbi machines adhere to ISO 2433 international precision norms, ensuring high-accuracy results across all models. The table movement linearity features a maximum deviation of 0.0002 mm/m, while the surface finish achieves a degree of Ra 0.2 μ. Obtainable grinding roundness is rated at 0.3 μ between centers and 0.4 μ when utilizing a live spindle configuration.
What makes the Omicron 600 ET7 suitable for automotive manufacturing?
The Omicron 600 ET7 is specifically designed for automotive businesses producing transmission components and shafts. Its dimensions and specialized capabilities make it a perfect fit for grinding these critical parts. Additionally, the machine is designed for modern manufacturing environments, featuring the capability to be easily integrated into robotics systems for automated production workflows.
How do the semi-automatic PLC grinding machines operate without hydraulics?
Unlike traditional equipment, Robbi semi-automatic machines are driven by brushless motors and ball screws rather than hydraulic movements. This mechanical approach ensures more constant speed, increased stiffness, and superior positioning accuracy. Manual micrometric adjustments are performed via multi-scale electronic flyers, while the PLC system automatically calculates dressing compensation to prevent the loss of zero.
What advanced customization options are available for Robbi CNC grinders?
To meet specific industrial requirements, CNC models can be customized with continuously controlled or indexed C and B axes. Available spindle options include hydrostatic, hydrodynamic, or electric varieties. Further specialized enhancements include robot manipulator connections, completely closed fairings, diamond dressers with CAD-loaded profiles, and specialized cycles for grinding curved cylinders, rubber cylinders, cams, or non-circular elements.
What are the technical capacity limits for the different Omicron series?
The equipment range accommodates varying scales of workpieces, with maximum weights on centers ranging from 120 kg to 4,000 kg. Grinding lengths vary significantly by model, starting at 600 mm for the compact Omicron R series and extending up to 8,000 mm for the heavy-duty Omicron M and CNC 80 models designed for large-scale industrial applications.
How is the SIEMENS Control System utilized in the CNC universal machines?
Universal CNC grinding machines are equipped with the latest generation SIEMENS 840Di sl system, which manages complex cycles through intuitive software. This integration allows for optimized geometrical parameters and camber machining without requiring advanced macro specialization. The system also supports optional automatic measurement devices and a third interpolated axis for high-precision crowning and specialized geometries.
General Information
Universal Grinding Machine Components
About The Robbi Group
Robbi is an industrial machine manufacturer based out of Italy and since 1936. Robbi uses materials and high-quality components to deliver the utmost precision. Most of their mechanical components are created in their machine shop.
Their company mission is to design and manufacture precision machine tools, technologically advanced, reliable, safe, easy to use, and “tailor-made” for each customer.
Machine Model Technical Comparison Chart
| Model | Max Weight on Centers | Max Grinding Length | |
|---|---|---|---|
R |  | ||
E |  | ||
P |  | ||
M |  |
