Similar Questions

• DAQ 6008 & 6211 counting

  Hi all.

  I work with an application that is count the pulses of an encoder hollow shaft renco to measure the distance traveled on a platform single axis powered by a ball screw and controlled by an engine step by step. The encoder is mounted at the opposite end of the motor directly to the ball screws.

  That said encoder has 100 impulses per revolution and at the moment im using only 1 channel on its release to make the count. I use the channel of single window on a DAQ 6008 real counting down.

  Here's my problem.

  When I run the engine at a moderate speed and measure count pulses from a full trip on the axis I get 8200 impulses. If I reverse the engine now and bring it back at the same speed, the full trip will give the same 8200 impulses which is exactly what I want. However, if I run the motor at extremely slow speeds the same 8200 impulses correspond to only 3 quarters of the race on the same axis.

  My hypothesis is that at top speed the DAQ 6008 lacks a large number of charges. I am correct in this assumption?  I will soon have access to a DAQ 6211. This will provide a more reliable metering device?.

  Thanks in advance guys. I'd appreciate comments.

  It is just as likely (if not more) that you are picking up additional indictments at the slower speed - you can confirm enough easily by calculating how many pulses to be emitted during the movement of the platform to the desired distance.

  The signal directly from a quadrature encoder can be quite noisy.  The 6008 is only able to edge simple counting, so no noise on a front amount could lead on Board being counted more than once.

  The 6211 supports a specific type of channel linear encoder, which configures the meter to use both signals A and B of the encoder.  In this mode, the meter requires alternating the edges of A and B to continue incrementing, which means a noisy transition will always only picked up like an edge.

  In case you do not have access to both A and B signals (or if the encoder is particularly noisy for some reason any and produced false edges in the middle of a period of high/low), the 6211 also supports filters PFI (link pdf Manual of use).

  Best regards

• Find the difference of pressure between the two transducers using a NI DAQ 6008

  Hello

  First of all, I'm a relatively inexperienced LabVIEW Developer, so my apologies in advance if this message does not have something, or otherwise lacks clarity.

  I try to develop a VI as follows the pressure difference between the 2 EME 3100 pressure sensors (4-20 my), related to two different pressure lines, using a NO-DAQ 6008. I would like for the acquisition of data to read the two transducers, then have him find VI the differential and write this differential in an Excel file.

  The data sheet for these sensors may be found at: http://www.gemssensors.com/Products/Pressure/Pressure-Tranducers/Sputtered-thin-film/~/media/GemsNA/...  It is a 3-wire system, with a voltage between 8 - 24V. I use an external power supply of generic brand to power sensors, which provides a maximum of 24V @ 4A.

  I drifted my physical connection (for the two transducers) this thread http://forums.ni.com/t5/LabVIEW/I-am-having-trouble-Omega-PX4200-Pressure-Transducers-to-where-I/m-p... and am relatively certain of the accuracy of the information. For purposes of signal conditioning, I use a 500 Ohm resistor between the signal of each transducer and the Earth wire.  On the side of software, I use the latest version of LabVIEW (2011) as well as MAX on a Windows 7 64-bit machine.

  In an ideal world, the sampling rate would be as high as possible, but 4 samples per second would suffice for all purposes useful.

  Given this goal, are there any sample of VI (especially for MAX, which I have not yet used) who would be similar/applicable to this project, specifically, regarding setting a sampling frequency, calibration of the transducers or affecting the pins/channels appropriate? All resources would be greatly appreciated.

  Kind regards

  MG Wilkinson

  Measure the voltage between the two resistance (resistance by probe 4-20 MA) using the differential inputs of the x 600.

  When you configure the task, you can read several entries at once, by entering in "Dev_ / AI0:1" in the physical channels and using the "several channels / {unique |}". multiple} samples"polymorphic instance.

  600 x can read 1kS/sec.

  Do maths/conversions on the table, and then simply subtract the two tables.

  Could also take some samples (10-100) at 1 kHz and their average together, give you a smaller rate effective sampling but with less noise.

  A loop of producer-consumer would be good architecture here, let the daqmx reading live in a loop and sends the data via a queue to a 2nd consumer that performs mathematical operations and write to a file.

  

• Apple pencil must be reconnected?

  Just got a pencil of Apple and the iPad Pro. I love! Used last night and went to use it this morning and the pencil did nothing. I had to connect to the iPad, then plug it back in Bluetooth settings. Is this normal? Should not always simply works without reconnecting?

  He must stay in touch.

  Make sure that the pencil is responsibility.

  Load your Apple pencil

  For a quick charge, plug the connector of lightning on your Pro your pen for Apple iPad. If the battery runs out, you can load from your iPad Pro for 15 seconds and 30 minutes of use

  

  You can also connect the pencil of Apple in a USB port to charge Apple pencil adapter and a USB cable Flash.

  

  To see the load your pencil Apple left, check the display of Widgets in Notifications on your iPad Pro.

  Use the pencil to Apple with iPad Pro - Apple Support

• Continuous output signal using usb DAQ 6008 in matlab

  
  

  Hi Takou,

  You already post with the same subject. Is this the same thing, isn't?

  If so, refer to the following link:

  How to get out a sinus with usb 6008 on MATLAB

  http://forums.NI.com/T5/Multifunction-DAQ/how-to-output-a-sine-with-USB-6008-on-Matlab/m-p/1510508#M...

  Best regards

• DC motor of control using the analog output of DAQ 6008

  Hello

  Since the 6008 DAQ implements not good PWM, can I control the speed of the DC motor using outputs analog, protected by amplifiers?

  This will damage my DAQ?

  Ok.  The engines will be quite low.

  Consider using an LM317 as the "amplifier". Add one or two diodes protection. Connect the AO to the terminal of the regulator with a resistance setting to land.  Your output voltage can go down to 1.25 V and up to minutes (battery-2 V, Vaomax-1,25 V). If you have a battery of 12 V and a 12 V, the maximum speed of the motor engine will be slightly lower than the nominal speed full. The minimum voltage the motor probably will not work.  The regulator has a built in protection against overcurrent and overheating.  It's the motor controller cheaper you can do and works very well.

  If you need to reverse the engines, things get complicated a bit more.  You can use a DPDT relay or a transistor H-bridge.

  Lynn

• Issues of analog input DAQ-6008, voltage not zero to pin when you are offline

  I use the 6008 NOR-DAQ to produce a series of tensions and then read a sense resistor using the analog input (CSR). I noticed that my analog input gives me 1.3 V, when I probe it (compared to the mass of the device), when it is completely disconnected. This changes the reading to give me a different measure of sense than expected resistance.

  Why is my pin for analog input non-zero? Any help would be appreciated. Thank you!

  The 1.3 V is expected. The USB-6008-and-6009 case have the strangest input of the world circuit. The input impedance is approximately 144000 ohms terminated in 1.4 V. check the document User Guide and specifications.

  Lynn

  

• Integrate USB DAQ 6008 program Labview

  I'm new to LabVIEW and am currently writing a vi to access the 6008. I'm using LabVIEW 2012. I installed the driver NOR-DAQmx 3.6, however, the sample code is code c - no vi. Also, I can't see examples of NOR-DAQmx in the finder of the example. I downloaded various examples, but each are missing Subvi which I believe should be installed with the driver. All advice is appreciated.

  Harry,

  1 DAQmx Base is only supported on Mac OS.  You can find petitions on the exchange of idea ask for better support.

  2 DAQmx and all its beautiful examples are not installed on the Mac.  This means that the measurement and Automation Explorer (MAX) is not installed on the Mac and things such as the DAQ Assistant exist (although it is not a great loss).

  3. when DAQmx Base is installed on Mac OS X with LV 2012 you should have the DAQmx Base screws accessible from the measures of e/s palette.

  4 installation DAQmx Base includes a bunch of examples in this direction: Applications: National Instruments: LabVIEW 2012: examples: daqmxbase: However, the example Finder doesn't seem to know they are there, then you will need to manually search.

  One good thing about DAQmx Base is that it is almost entirely written in LabVIEW, so you can see what he does.

  Once you get past the obstacles, the USB-6008 case works well with DAQmx Base and the Mac.

  Lynn

• I want to vary the speed of a 12v dc fan using a mosfet with a DAQ 6008.Is this possible.

  I am a college project that is to use a data acquisition to monitor and control the temperature. I use a LM35 temperature sensor. I need to control the speed of the fan a12v dc. I use an external power supply of dc 12. I hope to control the fan speed by varying the voltage of 5v to the door of the

  MOSFET. Is this possible.

  Hi shaggydog.

  You can use one of the channels of analog output of the USB-6008 output a variable voltage to the gate MOSFET, this should provide the features you need.

• My touchpad is erratic. Therefore, I installed a mouse, but he keeps going offline and must be reconnected. Using Windows xp. Pls answer to * address email is removed from the privacy *.

  The touchpad behaves very erratically. This is why the mouse is used. But the mouse disconnects very often any time (no frequency or cause) and must be unplugged and plugged again - sometimes every 2-3 minutes.

  Hello

  1. what exactly is the problem you are having on the touchpad?

  2. What is the brand and model of the mouse?

  I suggest you follow the steps in the link and check if it helps.

  Mouse, touchpad and keyboard under Windows problems: http://windows.microsoft.com/nl-BE/windows/help/mouse-touchpad-and-keyboard-problems-in-windows

  Hope this information is useful.

• Thunderbolt display slow and must be reconnected

  I have two screens thunderbolt and are both have oddly: fails both and who need to be unplugged and replugged constantly. Does anyone else have a question?

  Would be useful if you have carefully described your external set up to the bus and what port. There are 3 buses and 6 ports.

  read this:

  http://www.tekrevue.com/Tip/Mac-Pro-Thunderbolt-performance/

• I have a 610-1280qd Touchsmart when he goes to sleep night powers and must be reconnected

  He falls asleep in the night that the blue light on the side goes from blue to orange. In the morning, the yellow light is released, move the mouse, the keyboard, nothing. Push the power button, nothing.

  Disconnect the computer from the surge protector and plug it into the same place, nothing. Plug it into another dwelling in the surge protector, it lights up.

  I plugged directly into the wall, the same symptoms, unplug it, plug it into the wall, nothing. Plug the surge protector, it lights up.

  It is very consistent, by unplugging and plugging it into the same plug will not do anything, plug it in elsewhere, until she comes.

  Summer than a REALLY sweet computer except for present a defect and it's weird.  I got this computer since February and it started about 2 months ago.

  BTW, when I change the power management to have the screen go to sleep, but stay processor, it does not stay on a night which I suppose is not surprising. My power setting is balanced with the monitor in 10 minutes and the computer goes to sleep in 20 minutes.

  kezzyg

  After reading your post several times, then browsing the forums (HP and others), I suspect that this might be a question of power brick. It sounds BOUNCING so maybe that is a solution if you don't him have already explored.  Looks like others have had the same experience and the difficulty was to replace the brick.  I hope that if you find this message, your problem is already solved but if not, try this.

  I am an employee of HP.
  
  Kind regards
  Cooper56

  If you found this information useful, please make it easier for people who may encounter a problem of similar type marking my response as "accept as a Solution.
  
  Of course, you can also click on "Congratulations" STAR to say thanks! ***

• DAQ 6008 4-20mA output

  Oh wow, first post and don't even know if it really belongs here, but... in any case...

  I am a beginner and I am a little lost.

  Need to work on a final project and it seems that I do not understand how to turn it on. I need to use a lm35 (temperature sensor) as input to data acquisition and output... to this 4-20mA that controls the speed of an air/fan Extractor.

  At 25 ° C the fan should stop, and gradually increse will get its speed depending on the temperature as in, at 40 ° C is max. And at 50 ° C, necessary of LED lights as a sign "emergency."

  I know that I would need a few resistors in the... Range of 200-250 ohms or more, but... How to connect all this * beep * the output of data acquisition for the fan? because it's just a project I'll use one of these fans of pc/laptop as the "air Extractor.

  Thank you, peace.

  
  

• DAQ 6008 cannot be seen on a mac "says invalid firmware. any help on this

  I'm trying to get my macbook pro to see DAQ6008 of data acquisition, I get invalid firmware error any version OR-DAQmx version I use

  I managed to do the work.

• DAQ 6008

  Buenas tardes, una duda as tengo para a proyecto...

  Necesito UN tomar el dato Escalin engine UN frecuencia alterna a medida as voy variando, con esta tarjeta themselves can tomar esa frecuencia, o as proceso debo realize?... gracias.

  ¿Me can enviar su VI?