Coarse and fine adjustment

The invention relates to a coarse and fine adjustment for various use temperatures, in which a temperature-dependent output torque of the fine drive is required, with a low input torque. It is the object of the invention to design a coarse and fine drive with a known coarse adjustment in such a way that a temperature-dependent output torque of the fine drive and an optimisation of the input torque as a function of the load on the coarse and fine drive under climatically controlled conditions is achieved. This object is achieved in that the fine drive between the moveable and instrument-attached bearing is provided with at least one temperature-dependent energy accumulator for a temperature-dependent frictional drive and output drive torque and in addition to the temperature-dependent energy accumulator a temperature-independent energy accumulator is provided, the temperature-dependent energy accumulator being connected either in parallel or in series to the temperature-independent energy accumulator. It is advantageous to employ thermal-bimetallic springs for the temperature-dependent energy accumulator.