How to avoid vibration effects?
How to avoid vibration effects?
(OP)
Hello,
I am looking forward to install a laser based measurement system on a milling machine. The purpose of measurement system will be to measure small scale relative movements of machine components or machine bed.
The measurement unit weight is about 0.8 Kg. The unit could be screw mounted on a side wall of the machine (using a 25 cm aluminium arm). When machine in working condition, the side wall of the machine may possess some vibration (I guess very low). Thus I assume it will affect the accuracy of the measurement system.
Any suggestion to address this problem? I will be very thankful. Some approaches could be as follows.
• If I use some rubber dampers between side wall and arm, the unit may lose rigidness/stiffness.
• If I use separate mounting for the unit independent of the machine, it shall not be smart solution. There will also be a need of massive mechanical design.
• One solution may be using acceleration sensors at the other end of the arm to measure and compensate the vibration effects (not sure it could be a potential solution).
Any secession would be very welcoming. Thanks in advance.
Regards
simrs





RE: How to avoid vibration effects?
I also question why you would mount the measurement unit on a wall. Walls, by design, are not supposed to be rigid in one axis, thus introducing motion that may have nothing to do with the motion of the system as a whole. If the wall is oilcanning, then the motion is hardly representative of the machine's motion.
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RE: How to avoid vibration effects?
The length of 280 mm may amplify the vibration effects due to bending in arm. But I am not sure if it would be of considerable size.
The machine structure is of granite. The wall where measuring unit would be mounted is actually side wall (metallic) of spindle housing. I choosed it because it seems to be only suitable and potential possibility.
I understand your point that the vibration/oscillation may not represent the motion of the machine. Then it seems to be unsolved problem. Could you have some more suggestion ?
Regards
simrs
RE: How to avoid vibration effects?
RE: How to avoid vibration effects?
Additionally, you should look at how other people with similar systems deal with this type of measurement.
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