Three-axis motion and piezoelectric actuators

Carlos
Hello.
My name is carlos, i am new to this forum.
I have a need to move a mirror, pointing with a laser, to the coordinates that I enter using axes, x y.
Use three-axis motion and piezoelectric actuators to actuate the mirror.
There is one "vi" to entering the coordinates xy of two axes of movement for me the three actuators tripod.
The output would be a DAQ card with analog outputs to control the three axes.
Labview9 SP1
Sincerely,
Carlos

Hola Carlos,
la aplicación que planteas es perfectamente viable. El único inconveniente que veo es utilizar una tarjeta de adquisición de datos (DAQ Card) para controlar el movimiento de los 3 ejes. Para ello, existe hardware dedicado en arquitectura PCI para PC y PXI. En concreto, me refiero a la serie NI-73xx para control de movimiento, como por ejemplo:
http://sine.ni.com/nips/cds/view/p/lang/es/nid/7191
Puedes configurar tu sistema en http://www.ni.com/advisor/esa/ y ver qué productos te encajan más en cuanto a prestaciones y coste. Puedes llamar a National Instruments España en el 91 640 0085 para que un ingeniero de ventas te ayude a realizar la configuración en función de los requisitos que tengas.
Un saludo.
Jesus

Similar Messages

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I have an x-axis stage and a y-axis stage with 2 different leadscrew pitches, i.e.: one table has a 5 turns per inch leadscrew and the other has a 50 turn per inch leadscrew. Consequently, the stepper motors attached have to operate at different speeds (10x difference) in order for the tables to have the same velocity. I have this accounted for in the axis configuration settings in the NI MAX explorer. When I am configuring automated moves in LabView and set up a "vector space" composed of the two axis, it seems that the motors operate at the same speed and ignore the MAX settings. I thought that after intializing the controller, the current axis settings would be carried over and applied through the vector space and to the actual move
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Attachments:
sample.vi ‏39 KB

Rob,
you should be able to adjust the pitch of the leadscrews by setting the stepper steps per revolution and/or the encoder steps per revolution settings in MAX accordingly (in your configuration these settings should differ by the factor of 10 for your two axes)
In your application you then have to use the Load Velocity in RPM.flx and the Load Accel/Decel in RPS/sec.flx in order to get the same resulting velocities on both axes. If you do it like this you still have to account the factor of 10 for your target position calculations.
I couldn't find out if you have proceeded like that in your application as the vi you have attached is missing a crucial subvi.
If you are using a four axes board like the PCI-7344 or the PCI-7334 there is another option:
You
could use a third axis that acts as a master for one of your axes (I would prefer the axis with the 5 inch per leadscrew). Your real axis has to be configured to follow the master axis by a factor of 1/10. In your application you configure a vector space for the master axis and the axis that is not configured as slave. Your physical signal connections need to be done to this axis and the slave axis.
Please examine the LabVIEW gearing examples for more information.
In this case you should enter the same values for stepper steps per revolution and/or the encoder steps per revolution in MAX for both axes as the pitch adjustment is done by the gearing.
The advantage of this method is that now you can set the same velocities, accelerations and even target positions for both axes and you never again have to account the pitch factor.
Best regards,
Jochen Klier
Applications Engineering Group Leader
National Instruments Germany GmbH

3 axis motion control- where do I start?

I have to develop a hearing aid hybrid test system which will test an array
of hybrids. I already have the individual hybrid test code but need some
guidance with the motion control. Does anybody have any good references
for me on what aspects should be considered. All I really want to do is
step
and test but don't know much about motor types stepper/servo etc, limits,
calibration etc. Any tips would be greatly appreciated.
Regards,
Dow Airen
Design Engineer
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We use http://www.jrkerr.com/index.html motor control system. This uses
low cost Pics and a serial network. The drivers are a DLL and can be
called from LabVIEW. I have built multi axis devices and it has worked
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John Harmon
330-848-0460
----- Original Message -----
From: Dow Airen
Newsgroups: comp.lang.labview
Sent: Wednesday, November 24, 1999 12:33 AM
Subject: 3 axis motion control- where do I start?
>
> I have to develop a hearing aid hybrid test system which will test an
array
>
> o
f hybrids. I already have the individual hybrid test code but need some
>
> guidance with the motion control. Does anybody have any good references
>
> for me on what aspects should be considered. All I really want to do is
> step
> and test but don't know much about motor types stepper/servo etc, limits,
> calibration etc. Any tips would be greatly appreciated.
>
> Regards,
>
> Dow Airen
> Design Engineer
> Crystalaid Microelectronics P/L

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[....you might want to try using the animation codec..millions of colors...]
I gave that a shot this morning, and I'm having the same problem. See what's going on now is after changing the Field Order to even for the footage media, all of it looks decent except for the ones on an angle, croped or resized and I see this in both Motion's preview and the final render when I play it back in FCP. So as per your suggestion I rendered with the animation codec (filed rendering) and it still has it. Its just odd to me that it does that, like I said before I've worked in the DV/DVCPRO - NTSC codec with FCP and AE for years with no quality degrade. The reason I have always do that is that's what I capture to and that what my FCP project is so to keep it all consistant. BTW, this is going network and cable, no different than I usually do.
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Thanks
PowerMac Dual 2.0 G5, PowerMac Dual 1.42 G4, iBook 800 G3, Mac mini 1.42 G4 Mac OS X (10.4.7)

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