Use of linear motors results in:
- High levels of machining accuracy
- High speeds and acceleration reduce idle times
- Minimize operational wear and tear for better reliability
The following limiting conditions apply with respect to numerous machining tasks in high-speed technology:
- Cutting time is 30 to 50% of machine cycle time
- Idle time is 50 to 70% of machine cycle time
Therefore the cutting times as well as the idle times - consisting of chip-to-chip-time and positioning times - have to be reduced. The MAG Powertrain solution:
- Shortest possible cutting times due to high spindle performance and rotational acceleration
- Shortest possible idle times due to highly dynamic rapid speed
- Rapid speed rates: up to 120 m/min
- Axis acceleration: up to 1.4 g
- Broken tool detection while machine is cycling
- Shortest chip-to-chip-time (2.6 s)
The MAG Powertrain philosophy of high-speed machining includes accomplishing shorter machining times with high levels of machine availability. This requires the use of machine components resistant to wear and tear:
- Use of a gearless B-axis
- Use of linear motors in lieu of ball screws
The use of linear motors means that conventional transfer elements, such as ball screws, transmissions or clutches, are no longer required. Intelligent, digital drive control units offer the following advantages:
- High acceleration capability with high contour and positioning accuracy as no mechanical transfer elements are needed
- High contour accuracy with high path speed due to sensitive interpolation and traction-error-free internal drive position regulation with cycle times of <0.5 ms
- Since the drive contains no mechanical transfer components, machining can be done completely without backlash
- High degree of speed with control and accuracy
- High degree of load rigidity
- Maintenance free operation as a result of the absence of components affected by wear
- a Sensor built into the motor coils in the drive control unit monitors temperature and prevents overload damage
- High resistance to crashes
- Low force ripples improve surface finish
