Feed Force Measurement
 Simply know what nobody sees
Advantage through technology!

Without feed curve, shaft friction can hide wood defects

The friction of the shaft becomes greater the further the drilling needle presses into the wood. This influences the drilling resistance curve and causes the curve to rise steadily. The impact of the shaft friction cannot be separated from the actual drilling resistance. Consequently, the measurement curve of the drilling resistance curve remains rising even if the drilling needle penetrates a wood defect, although the drilling resistance decreases.

Measurement of the feed force provides high information value

In certain cases, only a comparison with the feed curve can show how strongly the measured drilling resistance curve is affected by the shaft friction and how large the damage in the wood actually is. This is because the feed curve drops significantly in the case of a wood defect and remains largely unaffected by shaft friction. In this way, especially the wood decay in the early stages becomes visible by the feed curve. Finally, the changes in the drilling resistance at that point in time are still so small that they can easily be covered by the shaft friction in the drilling resistance curve. The measurement of the feed force is also especially advantageous for hard wood species. This is because the shaft friction is higher with hard woods than with soft woods and therefore has a stronger influence. The additional measurement of the feed force makes it possible, especially with hard woods, to detect wood decay much earlier and more precisely than the drilling resistance measurement alone.