Different guide profiles

Advantages of using PM flow controllers on guides

  • The holding strips are often not needed if the load directions permit this, since in many cases with PM flow controllers there is no need for holding strips for simply increasing the stiffness
  • In the case of guides with no holding strips, the stiffness can also be increased significantly by means of negative pressure pockets
  • On guides with holding strips, the stiffness of the guide can be adjusted largely independent of the load by varying the pre-loading
  • No wear with increasing use
  • Power of ten improvement in damping, resulting in considerably better workpiece surface finish and tool service life
  • no fluctuations and variations in the friction, as is the case with rolling-element guides due to ball circulation
  • no feed force backlash when the direction of motion is reversed
  • practically friction-free at low speeds
  • no stick-slip effect
  • capable of travelling less than 0.1 µm
  • the sliding properties of the material, slide and guideway are unimportant – moulded mineral, aluminium or casting compound can be used

The hydrostatic guide is adjusted for: 

  • gravitational, working and accelerating forces
  • maximum speed and acceleration as well as the required stiffness and optimum damping

    Linear motor guide

    • the bending load caused by the motor's pull-down force on the slides and the guideways is relatively low
    • the laid-on pockets are biased by the magnetic force
    • suitable for horizontal and vertical slides, provided the lifting forces are much lower than pre-loading through the magnetic and gravitational forces

    Open guide

    • hydrostatic guides with utmost precision and excellent, stiff directional guidance for horizontal applications, provided the working and accelerating forces on the pockets are much lower than the gravitational forces
    • the weight pre-loading via negative-pressure pockets (shown in dark orange) can be increased, particularly suitable for cylindrical, surface and tool axles in large milling machines

    V-flat guide

    • no deformation through screwing, which means maximum precision
    • low manufacturing costs as surfaces do not need to be ground down to size and no strips are required for horizontal applications, provided the working and accelerating forces on the pockets are much lower than the gravitational forces
    • the pre-loading, and thereby the stiffness, can be increased via negative-pressure pockets (shown in dark orange)
    • suitable for cylindrical and surface grinding machines as well as measuring and ultra-precision machines
    • the stiffness of the directional guidance increases with load on the V-guideway

    Guides with holding strips

    • suitable for guides with loads in any direction and therefore can accommodate lifting forces
    • vertical hydrostatic gaps which are easy to achieve, highly accurate and extremely parallel
    • low manufacturing costs as no need to grind parts parallel and to size
    • the size of the total vertical gap is determined by a stepped section on one side on each of the two holding strips
    • suitable for horizontal and vertical slides subject to high levels of force, torque and stiffness