Experiment: method for applying and measuring torque
Experiment: method for applying and measuring torque
(OP)
Hi all,
I was looking for some advice on setting up an experiment. I just am looking for something simple, compact and rigid.
I am looking to apply and measure torque (via DAQ system) to a small shaft. I have leeway with the shaft design, it will be attached to the female end of a ¼” socket drive. The torque applied and measured only has to reach 50 in-lbs or so.
Since I am using a DAQ system I have a wide variety of measuring options. Two types that stick out to me;
(1) Socket extension sensor: http://www.omega.com/googlebase/product.html?pn=TQ...
I have used this in the past, loved it, it worked great… However I am looking for a much more economical method of this experiment… I need multiple of them.
(2) Strain gauge: http://www.omega.com/pptst/SGT_Full-Bridge_Shear.h...
Must be full bridge (temperature compensated). The cost is more in my range. I have used this exact type in the past, I don’t like this particular one for my application because my past experience: The ribbon leads are weak and broke on me often. I also have had some difficulty with the solder pads as well, the wires would occasionally break off on me. I guess what I am trying to say is that I am trying to find something slightly more ridged for this particular application.
I am open to any suggestions for applying the torque as long as it is economically and compact. It needs to reach roughly 50 in-lbs and only has to rotate bi directionally for 100 degrees (360 is fine though). It can be pneumatic, magnetic or anything you can think of as long as it is small, fairly inexpensive and can apply torque to a shaft.
Thank you for your help in advanced.
I was looking for some advice on setting up an experiment. I just am looking for something simple, compact and rigid.
I am looking to apply and measure torque (via DAQ system) to a small shaft. I have leeway with the shaft design, it will be attached to the female end of a ¼” socket drive. The torque applied and measured only has to reach 50 in-lbs or so.
Since I am using a DAQ system I have a wide variety of measuring options. Two types that stick out to me;
(1) Socket extension sensor: http://www.omega.com/googlebase/product.html?pn=TQ...
I have used this in the past, loved it, it worked great… However I am looking for a much more economical method of this experiment… I need multiple of them.
(2) Strain gauge: http://www.omega.com/pptst/SGT_Full-Bridge_Shear.h...
Must be full bridge (temperature compensated). The cost is more in my range. I have used this exact type in the past, I don’t like this particular one for my application because my past experience: The ribbon leads are weak and broke on me often. I also have had some difficulty with the solder pads as well, the wires would occasionally break off on me. I guess what I am trying to say is that I am trying to find something slightly more ridged for this particular application.
I am open to any suggestions for applying the torque as long as it is economically and compact. It needs to reach roughly 50 in-lbs and only has to rotate bi directionally for 100 degrees (360 is fine though). It can be pneumatic, magnetic or anything you can think of as long as it is small, fairly inexpensive and can apply torque to a shaft.
Thank you for your help in advanced.





RE: Experiment: method for applying and measuring torque
reason I ask is: If you know the force applied to a known length of the "wrench" trying to turn the socket, then you know the torque being applied. If so, then you can measure the force directly, and do not need to try to figure out the torque on the socket extension as it revolves.
RE: Experiment: method for applying and measuring torque
With that said, I am also looking for other method to apply this torque, this old set up I have is great, however is much too large and expensive for this new application. If there is a fairly compact way to apply the torque that we know will be consistent torque load over a long period of time, I am more than open to any suggestions that will allow me to not need a torque sensor.
RE: Experiment: method for applying and measuring torque
What actuator manufacturer do you work for? :)
RE: Experiment: method for applying and measuring torque
I really like that cylinder and scotch-yoke linkage idea. This would be consistent, rigid, and fairly compact; just what I am looking for. I will start playing around with a design. Thank you very much, I do really appreciate it.
To anyone else reading: I am always open to more suggestions.. there is never one right answer to a question like this.
RE: Experiment: method for applying and measuring torque
http://www.pcb.com/Linked_Documents/Force-Torque/L...