A positioning accuracy of just four microns in linear axes and only four secs of arc in the NC rotary table – compared to six microns and six secs of arc on conventional machining centres - applies to the four-machine Heckert HEC 1000/1250/1600/1800 models. The machines boast X, Y and Z axes travels from 1,700mm by 1,250mm by 1,850mm (on the HEC 1000) up to 3,400mm by 2,800mm by 2,250mm (HEC 1800).
The use of an innovative ‘jacket’ creates a machine base that is thermally insulated against ambient temperatures and internal heat sources, and a temperature control system guarantees to keep all structural components at a constant temperature to eliminate the chance of fluctuations between foundation and machine base and bed.
In addition, the granite bed offers similar static and dynamic properties as a steel version, but no thermal disadvantages – it has a 50% lower co-efficient of linear expansion - nor magnetic or corrosion issues.
If you find this article informative, consider subscribing digitally to Aerospace Manufacturing for free. Keep up to date with the latest industry news in your inbox as well as being the first to receive our magazine in digital form.