Motif in image database https://www.automation.siemens.com/bilddb/search.aspx?objkey=G_NC01_XX_00098
G_NC01_XX_00098
Positive backlash (normal case): the actual encoder value is ahead of the true actual value (table): The table does not travel far enough.
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Function
During power transmission between a moving machine part and its drive (e.g. ball screw), there is normally a small amount of backlash because setting mechanical parts so that they are completely free of backlash would result in too much wear and tear on the machine.
In the case of axes/spindles with indirect measuring systems, mechanical backlash results in the corruption of the traverse path. For example, when the direction of movement is reversed, an axis will travel too much or too little by the amount of the backlash.
To compensate for backlash, the axis-specific actual value is corrected by the amount of the backlash every time the axis/spindle reverses its direction of movement. If a second measuring system is available, the relevant backlashes must be entered for each of the two measuring systems.
Backlash compensation is always active in all modes following reference point approach.
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