How do I co-ordinate a two axis stepper motor/encoder system to move sinusoidally?

I am trying to add a second (lateral) motion axis to a tow tank assembly. The goal is to have the combination of lateral and longitudinal motion trace out a sinusoidal path. Any help would be appreciated.

If you are using a 7344 board then it would also be possible to do circular moves instead of using contouring. In your case you would need two 2D vector spaces running circular moves. You would only connect the first axis of each vector space to your drive while the other one is running as open loop stepper so it doesn't need any feedback signals. In this configuration the first axis of each vector space is doing a sinusoidal move.
Regards,
Jochen Klier
Applications Engineering Group Leader
National Instruments Germany GmbH

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Creating the Equivalent of a Single Axis Stepper Motor Indexer in a cRIO

I am looking for some FPGA code that implements a complete (or near complete) Single Axis Stepper Motor Indexer function on a cRIO using an NI-9474 DO module.
For those that aren't familiar with the term "indexer", an indexer is a pulse generation subsystem that provides pulses to a stepper motor driver that in turn drives the windings on a stepper motor. Some vendors provide a combination indexer/driver units that are issued motion commands via a number of communications standards.
The FPGA indexer should:
Output pulses in the 1Hz-800KHz range.
Run the stepper at constant velocity continuously or for a fixed number of steps.
Implement an acceleration/deceleration ramp when changing velocity.
Implement clock-wise and counter-clock-wise limit switches.
I have some demo code provided from NI that proves to me that an FPGA indexer is feasible, I am looking for some examples of a more complete indexer.

I am not aware of any examples of this being implemented. You mentioned that you have some demo code. Where did you get this, and if it wasn't from the website, could you post it? It is very possible that you can build off of this example to get the behavior you'd like.
Regards,
Burt S

Control two stepper motors with PCI 7332 for sinusoidal movements

Hello,
I am now using two stepper motors of RK566BAE (Oriental motor). I connected those two motors with UMI-7764 and PCI-7332. I designed to have independent sinusoidal movement of each motor. The first motor is wired to Axis 1 and the second to Axis 2 (of UMI-7764).
I want to use Ni-Motion to create a single VI in LabVIEW which helps to control both motors. But I have not figured-out how to obtain the movement I desired.
Could you please advise me.
Thank you so much.

There are two ways to do elliptical arc moves:
Use contouring two download target position arrays to the onboard buffer
Use arc moves in combination with gearing (shipping example). This requires three axes.
The 7332 doesn't support contouring and gearing and it doesn't provide a third axis, so there is no way to use this board for this type of moves. The cheapest NI board that supports elliptical moves in contouring mode is the PCI-7342. As the second option requires three axes, at least a PCI-7344 is required for this method.
Here is a link to a feature comparison table for all NI 73xx motion control devices.
Kind regards,
Jochen Klier
National Instruments

Have troubles switching between two ethernet stepper motors

Hi,
Please see the attached files.
Only the Axis which was initialized first is moving. The same motor moves from Step 1 (Rotate)-->Step 2 (Tilt Up)--> Step 3 (Tilt Down).
The other axis is not moving at all.
Could you please help me solve this problem?
Many thanks,
Cathy
Attachments:
three-step_20150410.vi ‏49 KB
probe_three-step-20150410.png ‏141 KB

I have the same problem. Once one axis has been interacted with, any attempt to move (or do anything else) on the second axis moves the first axis instead. I've tried invoking Destroy Motion Reference and disabling the axis but to no avail. The only way I've been able to switch the axis is by aborting and restarting the VI.
Attachments:
Ethernet Stepper Foobar.vi ‏36 KB

How can I change the speed of a stepper motor?

HSI bipolar Linear Actuator Size14, HSI Chopper Driver 40105, NI PCI-6052E, NI SC-2345, 2 SCC-DO01 modules, and SCC-FT01
The motor works at one speed with a boolean array input, using the SCC-DO01. But I need to be able to change the speed of the motor. Specifically it needs to operate on several frequencies of functions of as displacement vs. time, such as sine wave, triangle wave, and square wave. I tried to find information about using a digital pulse train but had no luck. Is it even possible to accomplish with this hardware?
Message Edited by Draben on 01-22-2006 09:43 PM

In general E-Series DAQ-boards like the PCI-6052E are not very good for motion control tasks. The 6052E doesn't provide hardware timed digital I/Os so you can control the digital lines only by software. This is both slow and inaccurate as long as you are running the board under a non-deterministic OS like Windows.
On a real-time OS the jitter would be better but still the frequency would be low and it would still be hard to program accurate acceleration and deceleration ramps.
If you use the counter/timer instead of the digital I/Os you could reach higher velocities and a much better timing accuracy but it would be even harder to program acceleration/deceleration ramps which you will need if you want to reach higher velocities with your stepper motor. Additionally for motion control applications you may want features like limit switch monitoring and following error tracking which require again real-time capabilities.
With this said I don't recommend the usage of a multifunction DAQ board as a motion control board. Please have a look at the NI motion control boards like the PCI-7332 which does all the motion I/O and trajectory control onboard.
Best regards,
Jochen Klier
National Instruments Germany

How can i control graph with two inputs?

Hi,
i would like to ask you about the graph with two inputs
Normally, if i just give one input, they generate the graph with this input(y) vs time(x).
But now i would like to get the graph with my two inputs in x axis and y axis .
i want to control both of two axis. How could i do for it ?
i attached the file that i try to use "Build XY graph" to control both x and y axis with random number .
It can run but i don't know how come the graph show nothing. .
Actually , it have to show something like wavefrom continuously. am i right?
Could you tell me a way to solve it ?
>>>
what i want to get is ..
in Graph,
for x axis , ditance (always increases)
for y axis , vibration (vary)
>>>
Thank you so much for your time . I am looking forward your kindly reply.
With Respect,
Su
Attachments:
using Build XY graph.vi ‏59 KB

Hi NI9233,
Mind me to interrupt, I am just helping Mike to explain what he meant to you, refer to the graph:
Picture 1:
Double click on Build XY Graph, uncheck the clear data on each call
Picture 2 and 3:
Change your formula node into +1 Basic Function in Functions Pallette.
Hope that helps!
PS: I am sorry for the size of the image, seems I made a mistakes when I saved the picture.
Sincerely,
Krisna Wisnu
Message Edited by Krisna Wisnu on 11-19-2008 08:19 PM
Sincerely,
Krisna Wisnu
Attachments:
Clear Graph on Each Call.PNG ‏46 KB
+1.PNG ‏30 KB
+1_2.PNG ‏21 KB

Another Question...rotating on two axis

Hi again. Well I have yet another question...how do I set a translation to rotate on two axis? Like I know that I can do:
TransformGroup tg;
Transform3D t3d = new Transform3D();
t3d.setRotation(new AxisAngle4f(1f,0f,0f,(some angle)));
tg.setTransform(t3d);
for one axis (I just put the declarations in to show an example) but if I try to apply two set rotations or two Transform3D's it doesn't work...so how would I rotate on, say, both the x and the y axis? Thanks,
Compaq

in fact the best thing would be to get used to quaternions. I suppose some Java3D tutorials discribe it quite well.
If you really want to use rotation on axis you have two solutions :
create 2 Transform3D and apply the result
Transform3D t3dx = new Transform3D();
t3dx.setRotation(new AxisAngle4f(1f,0f,0f,(xangle)));
Transform3D t3dy = new Transform3D();
t3dy.setRotation(new AxisAngle4f(0f,1f,0f,(yangle)));
t3dx.mul(t3dy);
tg.setTransform(t3dx);
(hum, at least i suppose it would work ;)
or you can do that too :
Transform3D t3dx = new Transform3D();
t3d.setRotation(new AxisAngle4f(1f,yangle/xangle,0f,(xangle)));
tg.setTransform(t3d);
(in this case xangle must be != 0)
I'm not really sure it will work so please tell me if it works. I've tried to help you twice today so you can send me some bucks to the folowing address :
oh, ok mum i won't give our address on the internet ;)
c ya
GnG

How to find ANGLE B/W two edges in Oracle Spatial

How to find ANGLE B/W two edges in Oracle Spatial. I have two edge connected on same node. I wanted to know the angle betwwn them. Can somebody help me out????

Ok. My first example was an approximation. The farther you get north or south of equator, the more inacurate it gets.
This one should do the trick with some degree of accuracy.
declare
PI constant number := 3.14159265358979;
g1 sdo_geometry;
g2 sdo_geometry;
g3 sdo_geometry;
angle1 number;
angle2 number;
FUNCTION POINT(P_LAT IN number
                ,P_LONG IN number)
    RETURN MDSYS.SDO_GEOMETRY IS
BEGIN
    -- we load both the ordinate array and the point type because some spatial functions show inconsistent behavior
    -- it is not important for this example, just something to be aware of
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                             ,mdsys.sdo_point_type(p_long,p_lat,null)
                                                  ,mdsys.sdo_elem_info_array(1,2,1)
                                                  ,mdsys.sdo_ordinate_array(p_long,p_lat)));
END;
begin
-- For the example, project in WGS84
-- g1,g2,g3 could also come straight out of the database as sdo_geometry
g1 := point(50, 7);          -- Point A
g2 := point(51, 7);          -- Point B
g3 := point(50,10);          -- Point C
angle1 := atan2(g2.sdo_point.x - g1.sdo_point.x,
                  g2.sdo_point.y - g1.sdo_point.y);
angle2 := atan2(g3.sdo_point.x - g1.sdo_point.x,
                  g3.sdo_point.y - g1.sdo_point.y);
-- depending on rotation and where we are on the planet, adjustments may be needed
if angle1 < 0      then angle1 := angle1 + 2 * PI; end if;
if angle2 < 0      then angle2 := angle2 + 2 * PI; end if;
if angle2 < angle1 then angle2 := angle2 + 2 * PI; end if;
dbms_output.put_line('Angle between the lines A-B and A-C: '||
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Stepper motor 8SMC1-USBhF and power meter PM100D: how to merge the two VIs into one and make a XY graph of the current position and the power

Hi there,
I have a stepper motor (8SMC1-USBhF) and a power meter (PM100D). I want to measure the power while the stepper motor is moving, and obtain an XY graph with the current position on x axis and the power on y axis. So I just merged the two VIs together by copying and pasting, and created local variables for current position and readout value, and changed them to read, and then linked them to the XY graph, but apparently it doesnt work.
So could you please instruct me how to merge them and obtain an XY graph appropriately?
Attached are the two VIs.
Thank you!
Attachments:
PM100D Simple Example.vi ‏42 KB
StepperMotor.vi ‏97 KB

Hello,
The XY graph requires that each datapoint on the X axis corresponds to a datapoint on the Y axis. To create XY data you will need to creat two arrays of X data and Y data with the same amount of elements then cluster the two arrays together to wire into the XY graph. As an example take a look at the VI snippet below. Is there a specific error being thrown?
Regards,
Isaac S.
Applications Engineer
National Instruments

How can I send email using two different email address that both link back to my one exchange account on my Ipad mini

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Ah, I should have made that clear. My domain didn't come from google. It was purchased at and is hosted at dreamhost, but I haven't used their email servers in years - I just route everything through gmail. I actually have a bunch of domains (with websites).
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How to send report output to two detinations at a time from command line?

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how to send my report to two detinations at a time from command line i.e FILE and Mail ?
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i want to send my report out put two destinations at a time insted of running two times.
thx in advance.....
raghu

hello,
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regards,
the oracle reports team

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How do I co-ordinate a two axis stepper motor/encoder system to move sinusoidally?

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