Feed force measurement
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In addition to the drilling resistance, it is the second measured variable of the IML-RESI PowerDrill® and provides additional information about the condition of the interior of the wood. This is because while friction on the drilling needle shaft (shaft friction) can have a strong influence on the drilling resistance, it has only a minimal influence on the feed force. As a result, the feed force together with the drilling resistance allows very realistic conclusions to be drawn for assessing the wood.

High accuracy for hard wood and early wood decay

The feed force is the force required by the drilling needle to penetrate the wood. Besides the drilling resistance it is the second measured variable of the IML-RESI PowerDrill® and provides additional information about the condition of the wood inside. While the friction at the drilling needle shaft (shaft friction) can strongly influence the drilling resistance, it has only a minimal influence on the feed force. This means that the feed force together with the drilling resistance allows very realistic results to be achieved for the evaluation of the wood.

Display of the feed force as an additional measurement curve

The IML analysis software displays the feed curve together with the drilling resistance curve in a graph. Both curves are color-coded. For a precise evaluation of the measurement results, it is important to interpret both curves in relation to each other and not just one measurement curve in itself.

Frequently asked questions about Feed Force Measurement

The wood inspection drill measures the force of the needle turning through the wood product. For example, when the bit hits any soft decay the force on the graph will drop and if the needle hits a hard, brittle decay the graph will spike. If the bit runs through a cavity area the graph will drop measuring no resistance for the bit. The measurements are then collected on either a wax paper strip (F-Series) or electronically recorded for an instant upload (PD-Series).

IML Wood testing systems for
feed force measurement


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