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Hi, all, I am working on a project to use small valves to control motion of robots. Because I am quite new to hydraulic systems, I would like to have common suggestions on how to choose control valve. By the way, will vendor provide models for their control valves? or what I could expect is...

Hi, All, I ordered a brushless DC motor from Maxon to drive my device, but the controller of the Maxon can only provide 10A continuous current which is not enough for my application (They said the controller can provide 20A in a short period of time, but the controller can not do it in a torque...

Than you for the quick reply. We had an ADS 50/10 and its theoretical current capacity is set to be 10A. However, the current drop can happen at 4A based on the feedback signal from the controller. There is a secondary current limit on the controller which should not be activated, however, it...

Hi, I met a problem with a DC brush motor recently. The whole system is relied on a DC motor controller and a small DC brush motor from Maxon in a current control mode. The current through the motor is adjusted by a analog output from a DAQ card directly. Recently we noticed that when the...

Hi, The compression load is used for control purpose. Best. Ming

Hi, I attached a picture of the system. It is for a leg prosthesis, and the loadcell is labeled in the drawing. Because it is very hard to decide how big the moment will be and which direction the moment will point to when a person is walking with this device, averaging approach will not work...

The axis compression load changes from 600N to 100N and the moment changes from 60Nm to 10Nm. It is a relative thin shaft but I am not limited to the cylinder shape for the loadcell. Best. Ming

Hi, All, I am in a very strange situation. I had to measure the force along a shaft which withstand both compression force and bending moment and direction of the bending moment keeps changing. Because I am only interested in the compression force, I used to connect a six-axis loadcell, which...

Hello, An Abaqus/CAE problem here. I am working on a pipe, and the load is defined by displacement of a point on the pipe's center line. How can I add such a boundary condition? Thank you in advance. Sincerely yours Ming

Thank you for the advice, Senad83. I was using C3D20R at the beginning and tried C3D20 later. The problem is still there. What I am trying to mimic is the benchmark problem: 1.1.4 Thick composite cylinder subjected to internal pressure (thickcompcyl_8el.inp), which also uses the C3D20R. The...

Hello, As a newbie, I am trying to learn Abaqus by myself. I made a simple composite cylinder model to mimic a benchmark example. However, I always got a mistake like ***ERROR: 64 elements have fewer than the required number of integration points. The elements are identified in element set...