Adjustable control and display element

Problems

Differences in the height or working position of operators lead to fixed display elements being viewed at different viewing angles. This can give rise to reflection, glare, or poor contrast on the display. Users often compensate for this by changing their body posture; during prolonged monitoring or adjustment tasks, this results in unfavourable static body postures.

Stress category

Location of control actuators
Visibility conditions
Postures and movements

Solution

The control panel on the Trumpf Trubend 7000 range consists of a touch display in which display and control elements are combined. Owing to the high installation height, the display can be angled downwards in order to attain the ideal viewing axis from a range of different heights, for example when the operator switches from standing to sitting (see EN 894-2:2009, Section 4.1.1; EN 894-4:2010, Sections 5.3.1.2 and 5.3.1.3 and Annex A; EN 61310-1:2008, Section 4.2.2). The changes in angle also enable glare effects caused by ambient lighting to be avoided without the worker having to change his or her body posture (see EN 894-2:2009, Section 4.1.3).

Principle of operation

• Adjustable operating and display elements for the avoidance of unfavourable body postures when used by multiple workers or in different work postures

Standards

• EN 894-2: Safety of machinery - Ergonomics requirements for the design of displays and control actuators - Part 2: Displays
• EN 894-4: Safety of machinery - Ergonomics requirements for the design of displays and control actuators - Part 4: Location and arrangement of displays and control actuators
• EN 61310-1: Safety of machinery - Indication, marking and actuation - Part 1: Requirements for visual, acoustic and tactile signals