Driving stepper motor via parallel port

Hi everybody,
I want to drive a stepper motor via the parallel port. The problem is to
create a constant frequency on a digital line of the port. I tried to do
so with a While-Loop with a certain delay, but the frequency varys due
to occurrences like mouse-movement (due to the call-ups of interrupts I
think).
Any Ideas?
Regards
Martin
Attachments:
Martin.Eis.vcf ‏1 KB

How about a simple NE555 timer circuit to externally create the constant
frequency, then use a bit in the parallel port to enable and disable the
NE555 circuit? You could probably go to Radio Shack and pick up the
components for less than $10.
Jim
Martin Eis wrote in message
news:[email protected]..
> Hi everybody,
>
> I want to drive a stepper motor via the parallel port. The problem is to
> create a constant frequency on a digital line of the port. I tried to do
> so with a While-Loop with a certain delay, but the frequency varys due
> to occurrences like mouse-movement (due to the call-ups of interrupts I
> think).
>
> Any Ideas?
>
> Regards
> Martin
>

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I am trying to send out a 5KHz TTL signal via parallel port. the CPU should be disturbed at most time. so we can't use loop structure. I guess I have to use interrupt mode to do this job.
In other languages, we might be able to programm 8253, which is a timer and counter chip on mother board. can we generate a 5KHz siganl via parallel port without disturbing CPU?
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Hello, first to
apologize for my bad English
I made a program for
driving a stepper motor CW and CCW with pulse.
I used USB-6008 for
sending pulse to a motor driver..
Now I’m making a program for driving a motor with typed in
code:
F=4        // Forward
(CW) 4 steps
B=12     //Backward
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S=2000 //Speed 2000
B=2        // … and so
on…
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Pleas help mi solve this problem. Thanks in advance !
Attachments:
Step Motor Bot.vi ‏82 KB
Motor.vi ‏139 KB
Parser.vi ‏30 KB

Step Motor bot only runs once.
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I think you still need to rethink your architecture. I think the Action Engine nugget would help you figure out what you want to do.
Message Edited by Ravens Fan on 02-02-2009 05:49 PM
Attachments:
Step Motor Bot_BD.png ‏19 KB

Setting Pins on Parallel Ports

Ok - going crazy - am trying to run a motor via parallel port - have a basic c app that does this but need to translate it into java. The code runs fine but no data is getting to the motor. Have tried with both a PrintStream and BufferedOutputStream but neither work (if they are in fact the prob)- this is what i have for the write methods.
public void getOutStream(){
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System.out.println("_GET_OUTPUT_STREAM_");
} catch (IOException e) {
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You must to forces the buffered output bytes to be written out to the underlying output stream.
To do this use the flush method.
public void write(){
int [] b = {0x19, 0x39, 0x13, 0x33, 0x16, 0x36, 0x1c, 0x3c};
for(int i=0; i<b.length; i++){
pos.write(b);
//bos.write(b);
// put here if you want to flush after write one byte.
bos.flush();
delay(500);
// or here if you want to flush only after write all bytes.
bos.flush();
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Stepper motor input pulse problem

Hello
I've purchased 4 autonics a41k-m599 model 5-phase stepper motors and 4 MD5-MF14 model drivers. I want to pulse the drivers via parallel port with c++. Now I have some serious problem, first I can't get a higher speed than 666 pps (1500 microseconds interval), second and more important when I send pulse to driver I see motors rotate smoothly but in some moments (and not regularly) they produce some small pauses which result in some small shakes or vibrations. Here I send you a scrap of my c++ code:
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Here's a picture of my driver's time chart and input pulse specifications:
http://lh4.ggpht.com/_sFND_wFW_Qo/SttpJRzLpKI/AAAAAAAACGA/uRNWYH519dU/s800/StepperMotorTimeChartPuls...
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Should you not have a delay between sending the high and low pulse? Otherwise the pulse will happen very quickly.
// ten cycle
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nrp
CLA

Using BNC2110 DAQ In Order to Control Stepper Motor

So basically my goal here is to use LabView to control the direction and the steps of the stepper motor.
I have BNC 2110 (connected to PC), Lin Engineering's 4218M-54P-04 Stepper Motor, and Lin Engineering's R701 Stepper Motor Driver.
The specification documentations are attached.
I know that the driver and the stepper motor are compatible.
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An example of a controller for this particular motor would be on this website.
I would much appreciate your support.
Thank you.
Attachments:
4LeadBipolarSteppingDriver-linengineering--4218m-54p-04.pdf ‏652 KB
DriverR701.pdf ‏379 KB

Hi jhprks,
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Using Software Timed Digital IO to control a stepper motor with DAQmx:
http://decibel.ni.com/content/docs/DOC-6385
Stepper motor control via Parallel port:
http://zone.ni.com/devzone/cda/epd/p/id/3611
High Performance Stepper/Servo control:
http://sine.ni.com/nips/cds/view/p/lang/en/nid/10026
Stepper Motor Theory of Operation:
http://zone.ni.com/devzone/cda/ph/p/id/248
Stepper motor Drives:
http://sine.ni.com/nips/cds/view/p/lang/en/nid/3308
Adam
Academic Product Manager
National Intruments

Drive a stepper motor

Hi,
I'm using LV 7.1 Pro under Windows XP. I can use a PCI 6602 card and also a PCI MIO 16 XE-10. I must drive a stepper motor via a specific driver : Philips TJA1010. This driver is working with a clock at ~7 Khz used as timebase and it has a serial data input that will activate the differents driver outputs connected to the stepper motor to create the rotation.
The sequence order to send via the serial data input is described in the attachment. The problem is to be able to generate this sequence on the serial data input. I already checked on the forum and found the .vi attached but I don't see how to create my sequence.
Thank you in advance for your help
Attachments:
drive stepper motor.vi ‏139 KB
cycle_stepper_motor.JPG ‏72 KB

Hi pasolo,
I'm not familiar with the TJA1010, so I'm assuming for this post that you have already hooked up one of the digital lines from your DAQ card to the input on the motor driver.
From what you describe, it sounds like you want to do a specific pattern generation on an external clock. There is actually a great example for that in the NI Example Finder. Just open LabVIEW and go to Help >> Find Examples. From the Browse tab, go to Hardware Input and Output >> DAQmx >> Digital Generation >> Cont Write Dig Port-Ext Clk. This should allow you to write a pattern of 0s and 1s that correspond to your required waveform. Also, some of the other examples in there might be helpful to look at as well.
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Thanks,
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National Instruments

Parallel port sample rate

Hi,
I`m desperately in need of your help.
For my school project, I`m trying to write a labview code in order to acquire air pressure data by using 8-bit analog digital converter via parallel port. Although my signal frequency very low -100 Hz-I think I experience sampling rate problem. I want to put sample rate and frequency data in my code but how can I put it in my code?I `m giving square waveform via function generator which I need to see it on my graph in Labview. But there is something wrong in my signal in waveform chart. You can see screenshot and code attached. . Also there are some noises and amplitude is not stable . How can I fix this?
Would you please have a look at to my code and tell me how can I set sample rate and frequency?
Attachments:
CAN1.VI ‏21 KB

Hi LW-s
There isn't really a way to set the sampling rate for these VIs. You will have to use software timing. The only way to do this is with 'wait' functions inside your loop. You can also implement some logic to smooth/adjust your waveforms. For a square wave the logic is pretty simple. If the input value is above a threshold store it as the max and if it is below the threshold store it as the min. (See the example below). For sine waves this is a bit more difficult and if I were you I would probably try to implement some sort of averaging.
Best Regards,
Chris J
Message Edited by ChrisJ on 08-23-2005 05:31 PM
Attachments:
example.JPG ‏86 KB

Using parallel port

Hi, i will use labview for my thesis project and i plan to input my data via parallel port.
My input data is 8 bits so i tried to use control and status lines of the parallel port.
I used the method that is described at NI`s developer zone web page which shows using control and status lines.
http://zone.ni.com/devzone/conceptd.nsf/webmain/72c6fc6ce4ad4d1386256b1800794596?OpenDocument
By using that method i achieved to input first 4 bits of my data over status lines while there were no change at those of control lines.
Because my data that i want to input consists of 8 bits, i could only be able to manage half of it.
what can i do for using control lines?
Or as a second alternative, is there any way to input 8 bits over data register?
Below i have attached the code that i had written to input by using control and status registers.
Attachments:
can1.vi ‏30 KB

Well, I looked at your VI and it looks like you have everything setup right. The only thing I can think of is that you are not grounding the control lines when you want to set them low.
As far as your second question is concerned some parallel ports can be bidirectional. The article that you provided explains how you can test if you parallel port is bidirectional, and gives an example on how you would read and write from the data bits.
Also, you may want to try the two parallel port shipping examples in LabVIEW. There is one that uses the data bits, and one that uses the status and control registers. You can find these examples by going to Help>>Find Examples, then search for Parallel.
Shawn B.
National Instruments
Use NI products on Linux? Come join the NI Linux Users Community

Stepper motor and sequence

There are stepper motor vi and sequence vi at the attach file. I want to control stepper motor via sequence vi. When I run the stepper motor vi, it can not be reached part of enter position. How can I integrate sequence vi into the stepper motor vi.
Attachments:
Stepper motor.vi ‏24 KB
Return Code Insertion.vi ‏14 KB

Sequence vi.
Attachments:
Sequence.vi ‏10 KB

Control of DMX J SA 17 stepper motor in Labview

Hi,
I'm trying to build a simple program to control an Arcus Technology DMX J SA 17 stepper motor via USB. I'm basing my program on the example which Arcus provide on their website, and which I attach in an llb (the program is demo.vi, the rest are sub vi's).
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NI-488: Command requires GPIB Controller to be Controller-In-Charge."
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Attachments:
PerformaxLV_v102.llb ‏500 KB

Hi Jack,
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Thanks again,
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Attachments:
Motor control.vi ‏92 KB
PerformaxLV_v102.llb ‏449 KB

Parallel port stepper motor

Hi All,
I followed the instructions on this link
http://zone.ni.com/devzone/conceptd.nsf/webmain/72C6FC6CE4AD4D1386256B1800794596,
in an attempt to drive a stepper motor. I used the VISA method and grounded pins 12 and 13 and tried to obtained some output with no success... Is there any other pins that I should take care of other than the data pins 2-9 and pins 12,13. I am using a mulitmeter to measure the voltage of the output data pins. I also tried the register method by using the outport.vi but also without any success. Both vis I written does not give me any errors. I tested the parallel port on a printer and it seem to be working fine. Perhaps I had missed out something? An early thanks for anyone who could enlighten me on parallel
port output.

Hello;
You don't need to worry about any other pins than the ones you described. The best way to trouble shoot that is by using a Scope to catch the output line of the parallel port and to have a really simple VI just writting a high level state on that line.
Regards
Filipe A.
Applications Engineer
National Instruments

Is it possible to use the parallel port to control a stepper motor (compumotor s6-drive)?

I'm using a compumotor S6 drive and I was wondering if I could somehow use Labview to program the parallel port to send the required step and forward backward signal to the controller and motor. All I need it to do is go back and forth at a user defined rate. Considering I know very little about Labview this is a daunting task indeed.

Hello Tiano!
I found an example on the www.ni.com website named "Reading from the Bi-directional Parallel Port."
Here is the link: http://sine.ni.com/apps/we/niepd_web_display.DISPLAY_EPD4?p_guid=B123AE0CBA4C111EE034080020E74861&p_node=DZ52058&p_submitted=N&p_rank=&p_answer=&p_source=External
Hope this and the other documents help you along your way!
BB_Phil

What is the data throughput in labview. I want to use the parallel as acheap digital i/o to drive a stepper motor.

I am trying to use the parallel port on a win xp machine to send data a@ up to a 3k rate. This is for the the purpose of driving a stepper motor. I have tried the port.out vi and placed this vi in a loop and it on a scope it looks like I am limited to a a 200hz rate. What am I doing wrong??? Can labview do this or is it too slow ???
Thanks

snook wrote:
> what is the data throughput in labview. I want to use the parallel as
> acheap digital i/o to drive a stepper motor.
>
> I am trying to use the parallel port on a win xp machine to send data
> a@ up to a 3k rate. This is for the the purpose of driving a stepper
> motor. I have tried the port.out vi and placed this vi in a loop and
> it on a scope it looks like I am limited to a a 200hz rate. What am I
> doing wrong??? Can labview do this or is it too slow ???
Basically the way the Port I/O VIs are implemented they call through a
device driver for each port access. This slows down the maximum port
accesses to something like 1000 times per second depending on the speed
of your CPU.
There is a way to do it faster but that is a little more trick
y. The
idea is to use a device driver to enable particular port addresses to be
accessed directly from the application level instead of always going
through the kernel.
I have written such a VI library and accompagning DLL and device driver
and made it available on OpenG. It is not yet part of the standard
binary distribution packets so you will have to get it from the CVS
repository.
Go to:
http://cvs.sourceforge.net/viewcvs.py/opengtoolkit/portIO/built/portio/
and download all the files in there including the ones in the
subdirectory "ogportio.llb" and if you like "docs"
If you want the nitty gritty technical details you can also look at
http://cvs.sourceforge.net/viewcvs.py/*checkout*/opengtoolkit/portIO/c_source/Description.htm?rev=1.5
On my 866 MHz Pentium mobile I can increase the number of port accesses
in this way from 440 ms for 4000 read byte port accesses (100us ms per
access) to 20 ms for the same number of read accesses (5 us per access).
Rolf Kalbermatter
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

Driving stepper motor via parallel port

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