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Everything posted by lvb

  1. I was wondering if anyone here could share some advice about closed loop control with or without the NI PID Toolkit in LabVIEW. I have an analog output replacing a potentiometer on a current control module. Previously the current draw potentiometer was set on the current control module to a value between 0-100 (reading on front of pot). If the operator set the value to "50"... as temperature and other factors changed, the machine would drift and the current draw setting on the pot (0-100 range) would no longer be valid. I would like to control an analog output (0-10V) to maintain a constant current draw in the system. The feedback is from an analog input via a torque sensor. The frequency of the control is on a cycle basis (once a minute). Any advice? Thanks!
  2. Excellent! This actually solves a readability issue with all of the LabVIEW programs that I have inherited. Now I can go through all of the case structures and replace mystery numbers with descriptive text. Thank you for the great tip!
  3. I would like to create a control that has Enum data type, but looks like this (menu ring): The Enum does not have a drop-down arrow for the user to realize more options are available, and I find the Menu Ring control more clear. Is this possible? Thanks!
  4. I took a look at NI's Test Stand, but it seems to be more complex than I want the technicians to deal with. Any chance you could post/e-mail some of your block diagrams for reference? I am looking to do the exact same type of application. Any one else have some examples of such an application? Thanks!
  5. I am fairly new to LabVIEW (6 months) and looking for a solution for test and measurement. There are a few types of tests that we run: state machines (wait for a certain set of digital inputs), ramping tests (increase output until certain input is hit), and position/voltage control (maintain a position/load/acceleration) and also log test data to a database. I would like to create an environment where a user could “program” a test with ease. We currently have the capability of a state machine with digital inputs, but lack the ramping and position/voltage control. I was wondering if the community here could recommend some examples/solutions for this type of application. Also, I was wondering if anyone has examples/resources that allow a user that has no LabVIEW experience to “program” this type of machine. Basically to create an environment where the user could select certain steps in a sequence and have that sequence repeat, for example: Step 1. Output the voltage on channel "n" to 10.0 V Step 2. Wait for digital input "x" to turn on Step 3. Increase the voltage on channel "n" at "y" Volts/Sec Warning: this is also cross-posted in the official ni forums, but I figured I should try to get feedback from both communities. Please respond with your advice! Thanks, Brian
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