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Listening to the system’s heartbeat

Saw blades are the “heart” of a sawmill. The precision cutting and longest possible service life of the blades have a crucial influence on the quality of the cut and the overall costs of a sawmill. Equipment manufacturers offer motor management through power monitoring to get the best possible protection for the saw blades. With “hard streaked” or “twisted” logs – so-called reaction wood, and with blunt saws, there is higher power consumption and the feed rate is reduced. This system is sluggish and slow and so does not enable optimum protection of the saw blades.

The CSM Heartbeat system monitors the “heartbeat” of the saw blades like a stethoscope. Every slight noise is registered and appropriate impulses are immediately sent on to the control unit of the sawing line. Before the motors even start to take up more power due to the higher load, the acoustic circular saw monitoring system counteracts this. CSM Heartbeat reduces the feed rate – often just for a second, so as to prevent any “pinching” and so damage to the saw blades. After this short reduction, the sawing plant immediately carries on again at normal speed. Finally, CSM Heartbeat allows to increase the overall speed of the sawmill, thus improves the output of the whole sawing plant – it has the same effect as “chip-tuning” with cars.

Set-up, function, installation & service of CSM Heartbeat

CSM Heartbeat is very easy to set up: it comprises an acoustic sensor (microphone), an electronic unit and the CSM software, always in the latest version. The microphone continuously monitors the noise level (SLP) of the saw blades. If a value is registered by the microphone which is above the limit set, therefore indicating imminent “pinching” or an overload, then the CSM electronics and software immediately send a command to the sawing plant’s control unit resulting in a short reduction in the feed rate, and the plant is soon running at normal speed again.

The MAV (Moving AVerage) indicates the wear of the saw blades. It is a sign of increasing wear If the MAV rises. Thus the optimum time for changing the saw blades can be determined.

History of CSM Heartbeat. Trace of MAV and feed rate within 1 hour.

This “advance listening” enables the feeding speed to be substantially increased – by up to 30%! Saw blades that are up to 1/3 thinner and also higher can be used without any risk.

In addition, the maintenance cycle of the saw blades is optimised by measuring the Moving Average level MAV. If the saw teeth become blunt, the MAV increases. This allows the optimum time for maintenance to be determined. Re-sharpening is therefore determined by the actual wear and not by the operating time. The service life of the saw blades can thus be extended several times over.

Two to four measuring systems are installed per sawing line, depending on the size of the plant. It only takes a few hours to install CSM Heartbeat. The work is carried out by our engineers. It is possible to maintain and check the system 24/7/365 all over the world using remote maintenance.

Your cost saving

Higher productivity

better efficiency, higher throughput

Higher product quality

less waste, higher cutting accuracy

Lower saw blade wear

shorter set-up times, less sharpening work

Fewer complaints

higher customer satisfaction

Lower material consumption due to thinner saw blades

Reduced saw blade costs due to optimised maintenance cycles

the MAV indicates the real wear which determines the moment of maintenance

Return on investment (ROI) guaranteed in just a few months!

Sample Calculation

All CSM Heartbeat systems installed reached significant improvements.

A saw line is producing 450.000 fm / year in two-shift operation

With CSM Heartbeat 50 % of the saw blade costs typically can be saved.

The annual total costs for saw blades are € 35.000

Sum of downtime per year: 6.750 min

50% cost savings = 219.375 € / year

Approx. 10 times per week problems with saw blades, which each ends up in a 15 minutes production stop

Costs of downtime per year: 6.750 x 65 € = 438.750 €

Conclusion: Return of Investment in 3 Months!