PCI-6220 and Absolute Encoder

Hi,
Can anyone point me to a C# compatible example that would serve as a good starting place for determine the position of an UUT?
Using 12-bit absolute encoder with PCI-6220, I need to determine if the UUT (with optical encoder mounted) is moved either up/down 30 degrees from 0.
This piece of code will be called from another API to tell the motor to move then stop moving when the desired position of the UUT is found.
Any advice would be appreciated.
Sonny

Hi nimaq,
If you are using the DAQmx drivers, you can find the .NET examples here:
C:\Documents and Settings\All Users\Documents\National Instruments\NI-DAQ\Examples\DotNET2.0\
The position measurement example is located here:
C:\Documents and Settings\All Users\Documents\National Instruments\NI-DAQ\Examples\DotNET2.0\Counter\Measure Position
Chris Bolin
LabVIEW Partner Program, CLA

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Attachments:
Ultracold Bloom User interface.vi ‏77 KB

One solution would be to run a wire (a real one! you know with copper inside it? ) from the counter output to one of the PFI lines on the same card and then tie the PFI line to RTSI bus...
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"... after all, He's not a tame lion..."
Be thinking ahead and mark your dance card for NI Week 2015 now: TS 6139 - Object Oriented First Steps

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Hi Cold
I attach three links for you can start your application:
- Quadrature Encoder Measurements: How-To Guide:
http://zone.ni.com/devzone/cda/tut/p/id/7109
- NI USB-6221 BNC:
http://sine.ni.com/nips/cds/view/p/lang/en/nid/203867
- DAQmx (E/M/S-Series Cards) with MATLAB®:
http://digital.ni.com/public.nsf/allkb/7076035AEA7835FE8625707300520720?OpenDocument
If you want, you can make contact in portuguese.

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it works great for determing the position of the renishaw.
the renishaw encoder type is
rgh24x30a00a
http://www.renishaw.com/en/rgh24-linear-encoder-system--6444
i would like to try the pci 6601 on a similar encoder.
With this new encoder, im not seeing any output from the pci 6601.
I can see the pulses on the oscilloscope so im alittle confused.
The pulses appear center around 2.5 volts and are around 1v in amplitude.
In the same manner as with the renishaw, B- goes to counter 0 aux, a- to 0 source, and grond to ground.
I believe the particular renishaw has a 1v peak to peak sinusoid pair (sin / cos).
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Message Edited by jimmyinct3 on 11-14-2009 05:57 PM

If the signal is centered around 2.5V as mentioned, then it sounds like you will have difficulty meeting the TTL thresholds for hi/low. A TTL input signal is defined as "low" when between 0 V and 0.8 V with respect to the ground termina... Scope both encoders and compare the signals that you are seeing on both. What are the differences?
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I'm using Labview, DAQmx, PCI-6220 (Counter0). I connected an incremental encoder signal to the source input of CTR0. In Labview, the "DAQmx Timing" vi requires that the "source" input be wired. Does this "source" actually mean the source of the sample clock vs. the "Source" input to the counter?
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Chris,
When you talk about using a DAQmx Timing vi, I assume that you are performing
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You can see an example that performs buffered event counting in NI Example
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Jesse O. | National Instruments R&D

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I am using a PCI 6220 connected with a SCC 2345, on labview 71 XP based.
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How do I get an Analog Signal Generation Synchronized to six times the frequency of an absolute nine bit parallel encoders output with adjustable phase relation. I am using a PXI-6533, a PXI-6711 and have available a PXI-6070E.
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Phil,
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Christian L
NICS
Christian Loew, CLA
Principal Systems Engineer, National Instruments
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Hi,
I have NI PCI-7344 and UMI-7774 and i want to
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Hi MotiM,
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Message Edited by Adam_H on 09-19-2008 03:41 PM
Adam H
National Instruments
Applications Engineer
Attachments:
MAX.jpg ‏93 KB

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Hi,
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Got the info I needed disregard post

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[Question] PCI-6220: digital level at the pause of a continuous impuls train with external trigger

Hallo,
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Wei

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Hi Labviewers,
I'm using a a PCI 6220 card for AI and having some troubles (LabView 7.0 / XP on industrial PC / DAQ-mx 7.4 but I also tried with other versions).
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Paolo
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I think you found the answer yourself by delaying the startup of your application.
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