I am using GE varnish to stick this linear strain gauge on PZT piezo actuator to calibrate strain produced by PZT piezo actuator. I am not getting anything. could someone help why is it not detecting anything?
A lot of things could go wrong:
- bad glue.
- bad wiring.
- equipment malfunctioning.
- there are no deformations.
You could check the system by pressing the SG with tip of your finger (the soft part). If there is a change in the measurement, it is probably everything OK with the wiring and equipment. When you release the SG, and the measurement goes on zero again, then your glue is probably ok.
@ Emir Neziric, Thank you for your input. I am using GE 7031 varnish as a glue. Do you recommend appropriate glue to use?
Emir Nezirić
Never tried it on a strain gauge, but my experience said that there should not be any "alternatives" to original SG glues, since the insulating material (base of the SG) is made from materials that are not easy to bond.
Also, measurements are highly impacted by the stiffness of the glue layer.
Cyanoacrylate is for example to fragile; some epoxy glues does not stick to the SG and have a thick layer under SG which gives bad results.
My suggestion is that you use original SG glue recommended by SG producer, and you should be safe.
Have tried any of my suggestions in my previous answer?
Emir Nezirić I have attached this strain gauge on copper plate using ge varnish 7031 and applied heat to the copper plate. Then, I have measured change in resistance of this strain gauge and it was working. However, it is not working for this piezo actuator. I suppose the strain produced by this copper must be very higher than this piezo actuator. If you have any thoughts about this, it would help me a great deal.
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