Tubi

QUOTE (Neville D @ May 22 2009, 07:01 PM) I didn't exactly did the same like you but i used the case structure and now it works. Finaly can start measuring. thx.

QUOTE (Neville D @ May 20 2009, 07:22 PM) I know that vi exists but it doesn't work for a square signal. So i can not use that vi. Now i measure a phase shift that sometimes is more than +/-180 deg. not errors but more like ==> (340° = -20°) it needs to stay between the +/-180°. because now i can not put this in a graph in excell or something like that.

QUOTE (ShaunR @ May 18 2009, 12:40 AM) Tried it on the machine, everything worked fine except the phase shift sometimes gives me value's of 227° or -201° for example. These phase shifts are imposible cause you always stay between the -180° to 180°. How can i prevent this? by triggering or something like that...?

QUOTE (JasonXCX @ May 18 2009, 03:07 PM) Intresting, I use a accelerometer of analog device (ADXL103) a 1,7g single axis accelerometer. Is very usefull. I read the signal with a daq to labview. Then i simulate the signal identical on the measured one. And when the simulation works i test the real signal. works fine now. thx for the link, defenetly will try it today.

QUOTE (ShaunR @ May 18 2009, 12:40 AM) Thx for the quick reply, This is a huge step forward for us, We can now start to measure on the machine. Thx again for your help.

QUOTE (ShaunR @ May 15 2009, 03:18 PM) I didn't runned it on the machine yet, but just simulated it. If i lower the frequency then he gives the error again about the reference levels. Don't understand why it works on 20 Hz but not on 3Hz

QUOTE (ShaunR @ May 13 2009, 07:29 PM) Thx, Tried the percent levels and also setted the signal in resetting mode. it al works fine. then i tried it on the machine himself but it didnt worked. Figured out that it was of cause of the low frequency. I also simulated it, but it didn't work. I already tried to changhe the samples and the rate. But didn't make any sense. Tried to change my filters. but all without succes. http://lavag.org/old_files/post-15503-1242391709.vi'>Download File:post-15503-1242391709.vi

Hi, Im quiet new in labview, using version 8.6. I need to develop a system to detect a phase shift of vibration between a case and the rotor. (of a washmachine) I simulated the signals in labview and the upper "pulse measurements.vi" quotes: "Error -20308 occurred at an unidentified location Possible reason(s): Analysis: The waveform did not cross the mid reference level enough times to perform this measurement. Check the signal length, reference levels, and ref level units.Analysis: The waveform did not cross the mid reference level enough times to perform this measurement. Check the signal length, reference levels, and ref level units." If i attach a signal directly to the upper pulse measurement vi then it works fine. if i run with the converted signal he gives the error, but i can continue But i need to measure from 3Hz, now it's still 20 If i place it on 3Hz he refuses everything. Hope someone know's a solution. Download File:post-15503-1242203275.vi