The mounting method is one of the most critical factors for measuring vibration. A rigid attachment is essential for avoiding false readings and data.
Depending on the type of machine and position, different mounting methods could be used. To get the best results from the DynaPredict solution, screw mounting is recommended. To do this, the installation surface must be prepared first, as described below.
Drilling the Machine
Drill a threaded hole with an M6x1 threaded tap (supplied in kits with 21 DynaLoggers) at the point of measurement, at least 15mm deep.
Using a wire brush or fine sandpaper, clean any solid particles and scale on the surface of the measurement point.
After surface preparation, the DynaLogger attachment process should begin.
Position the DynaLogger at the measurement point so that the base of the device is completely supported by the installation surface. Once this is done, tighten the screw and spring washer* supplied with the product, applying a tightening torque of 11Nm.
* Use of the spring washer is critical to achieving reliable results.
Some cases of installation require greater care when attaching the device. In such cases, installing with epoxy resin together with the screw may be beneficial. For example:
- Attaching to curved surfaces, i.e. where the base of the DynaLogger will not be fully supported at the point of contact;
- Attaching to part of a machine that does not allow a hole depth of at least 15mm;
- Attachment where the Z-axis of the DynaLogger is not positioned vertically in relation to the ground.
In these cases, chemical cleaning should also be done in addition to the traditional surface preparation described above.
Using an appropriate solvent, remove any oil or grease residue that may be present at the installation location.
After surface preparation, prepare the epoxy adhesive:
Preparation of Epoxy Adhesive
Prepare approximately 2 cm³ of two-part epoxy resin, according to the manufacturer’s instructions. Use of gloves is recommended. Finally, attach the DynaLogger:
Distribute the epoxy resin paste over the bottom surface of the DynaLogger, keeping a clearance of approximately 2mm from the metal pin to avoid interference with the temperature measurement.
Press the DynaLogger at the measurement point, orienting the axes as appropriate (shown on the product label). Once this is done, tighten the screw and spring washer supplied with the product applying a tightening torque of 11Nm. Press any leftover epoxy paste against the walls of the DynaLogger for better fixation.
Other cases may restrict the option to use the screw attachment method completely, such as:
-When it is impossible to drill a hole in the machine;
-When the surface has a thin wall or gap with little contact area for the screw.
In these situations, the adhesive method can be used as an alternative to the screw method.