| Design of a High speed high performance linear axis |
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| In the Figure above a linear motion axis is shown equipped with an ironless linear motor and aerostatic bearings preloaded by magnets. The slide surface is made of structural steel coated with a hard chromium layer and finally grinded. The circular thrust bearings of 40mm diameter are designed to carry a load up to 500N each when fed with a supply pressure of 5 bars. The nominal film thickness amounts 5µm. The moving mass of the rotor is 2.9 kg. With the peak force of the linear motor of 470 N the rotor accelerates with 160 m/s2. A linear encoder is used for accurate positioning of the rotor within tenths of a micrometer. Newly design partially grooved air bearings are applied. Compared to the shallow pocket bearing this bearing shows improved load capacity and self aligning capacity. |
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Design of a High speed high performance linear axis
A precision linear motion axis with an ironless linear motor and magnet-preloaded aerostatic thrust bearings, using partially grooved air bearings for improved load capacity over a shallow-pocket design.
Door Anton van Beek
- Externally pressurized gas bearing — partially grooved surface (design chart)
- Externally pressurized gas bearing — shallow pocket (design chart)
Gemigreerd van /calculators/c12_2.htm. Technische inhoud behouden; presentatie gemoderniseerd.