Process 240 pieces of wood, both soft and hard, per minute? The HS finger jointing lines from WEINIG promise just that. With an output of up to 200 parts per minute, the horizontal single board milling machines are the fastest in the world. To achieve this, short sections of wood are fed into the machine, interlocking inside the machine to form long planks. As with most large industrial machines, however, there is a whole list of safety risks with, which must be reduced to an acceptable residual risk with the right measures. This article sheds light on what these are, and how they can be managed.

First of all, a risk assessment is carried out. For the HS finger jointing lines, this shows that shearing, crushing and cutting are the focal points of danger. To limit the risk, protective areas are defined and secured with protective grids. In addition, the operating instructions refer to remaining risks.

In order to still have access to the protected areas, e.g. for repair work, a safety module is required to manage the remaining safety hazard. WEINIG uses the DN3PS2 standstill monitor from DINA for this. It measures the electromagnetic force when the motor stops, and switches if the signal falls below the previously set threshold value. If this threshold value is undercut, access to the protected areas is granted.

Using the DN3PS2 module has a number of advantages. WEINIG no longer requires external sensors, and an external measuring system is also no longer necessary. In addition, the module can be configured quickly and easily. It can be used flexibly for all operating modes from 50 to 1000mV.

If you also need a safety solution for your machines, or if you simply want some non-binding information on DINA’s product portfolio, or safety of machinery in general, please come and visit us at our stand. You will find us in hall B1, stand no. 522.