2D-Position/Vibration measurment
2D-Position/Vibration measurment
(OP)
Hello,
I want to measure a 2D-Position of a machine part. The movement may be like a vibration.
Aplitude 50-500 µm
Frequency 20-60 Hz (variable, depending upon speed of the machine)
There might be different ways, like using sensors (capacitive, inductive, laser based methods, laser triangulation etc.).
I would be very thankful if I could have some guideline in this form for a suitable approach addressing my problem.
Thanks in advance
Simrs
I want to measure a 2D-Position of a machine part. The movement may be like a vibration.
Aplitude 50-500 µm
Frequency 20-60 Hz (variable, depending upon speed of the machine)
There might be different ways, like using sensors (capacitive, inductive, laser based methods, laser triangulation etc.).
I would be very thankful if I could have some guideline in this form for a suitable approach addressing my problem.
Thanks in advance
Simrs





RE: 2D-Position/Vibration measurment
What are you measuring the motion relative to? What will the data tell you? How often? How accurate?
TTFN
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RE: 2D-Position/Vibration measurment
I am trying to measure the position of a moving/vibrating machine part which is moving relative to machine bed. This motion is actually decoupled from the machine bed as well as from the rest of the machine due to a special spring damper system. This moving part is indirectly attached to work piece mountings and its undesired movement may have influence on our knowledge about work piece. Machine is 3 axes machine. x-y axes on work piece. Z axis on spindle.
The required measurement should most probably be relative to machine/spindle coordinate system. It should be later used to modify CNC code to improve machining process. Measurement accuracy is required up to 2-3 µm.
Thanks and Regards
simrs
RE: 2D-Position/Vibration measurment
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: 2D-Position/Vibration measurment
RE: 2D-Position/Vibration measurment
Regrds
simrs
RE: 2D-Position/Vibration measurment
How is the workpiece position sensed currently?
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TTFN
FAQ731-376: Eng-Tips.com Forum Policies
RE: 2D-Position/Vibration measurment
RE: 2D-Position/Vibration measurment
Machine bed, unfortunately, is not big. The total x-y travel is 200x200 (mm2). Additionally, I want to avoid laser interferometry. As the metallic partials interrupting the laser beam, we lose the information. It may also be expansive. High accuracy of the required measurement system is a key requirement.
Currently the work piece position is measured by linear encoders. This is a research machine. To achieve more accuracy, we are testing an additional and unconventional mechanical system, some how, attached with work piece fixtures.
The laser bases measurement system which I discussed in another post, supposed to mount on spindle assembly wall, would be an additional and independent system to this post. The idea of mounting it on wall was to get the measurement in spindle coordinate system. But I am not sure if wall is reliable enough and arm is stiff enough to accomplish it.
Regards
simrs
RE: 2D-Position/Vibration measurment
http:/
These were originally used for an electronic "Ball-Bar" test.