Configure stepper motor with MAX

Hi,
After wiring VI, I don't know what must I do to control my stepper motor?
Can anyone give general information what must to do.
How to configure stepper motor with MAX? I'm using PCI6036E.
Thank you

The answer to your question is dependent on your motor/motor controller and the inputs that it needs. Are you using a stepper motor controller? The PCI-6036E probably won't be able to supply enough current to power your motor (max 5mA) by itself, so you will probably need a stepper motor controller. With the 6036E, you do have 2 analog outputs, 8 digital I/O, and 2 counters (can be used for pulse train generation). Have you considered an NI Motion Control Board? ni.com/motion
-Alan A.

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Possible to drive a stepper motor with PCI-6111?

Is it possible to drive a stepper motor with PCI-6111?

Hello Tristan,
If your stepper motor is TTL compatible you should be able to control it with one of the two counters on the board. Keep in mind that the stepper will ask for a certain amount of power so before attaching it track down how much power it consumes and take a look at the Specifications of the PCI-6111 to be sure that the counters on the board can deliver that amount. If the stepper takes to much power you have to use some kind of power drive which can be controlled with digital (TTL) signals or Analog signals between -10V and +10V.
Hope this helps.
Best regards
RikP
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Rik Prins, CLD
Applications Engineering Specialist Northern Europe, National Instruments
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Stepper Motor with Linear Stage (Position Control and Data Acquisition)

Hey All,
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Thank you,
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you are more than welcome .. ok i attached a vi that could help you .. i'll illustrate how to connect your driver to your usb data acquisition card.
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Attachments:
bipolar motor control.vi ‏20 KB

Anaheim Automation stepper motor with PCI-7330 and UMI-7764

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Thanks for the reply, I am trying to run any of the find reference example VIs from NI. I've not edited the code in any way.
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It was suggested to me I might have the grounds miswired, the manuels were not all that clear so I'm unsure.

Control two stepper motors with PCI 7332 for sinusoidal movements

Hello,
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Greetings,
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There are two ways to do elliptical arc moves:
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I continue understanding nothing..
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Attachments:
photo 1.JPG ‏1150 KB
photo 2.JPG ‏987 KB
photo 3.JPG ‏1085 KB

Hi jtarula,
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Which stepper motor is required to connect with labview

title:fault detection in pen. i am doing a project in image processing using labview .i want to interface stepper motor with labview using daq how can i interface and which type of stepper motor is suitable for rolling metal sheet in which the pen is placed at the top

I would start with the motor and work down, Labview will woek with any.
1. Figure out how much motor you need: torque, speed, resolution, size (nema 23, 34 .....)
2. Select a drive for your motor: many diferent drivers to control a particular motor, How much current is required, motor voltage, inductance
3. Determine the interface to the controller: step and direction, cw/ccw, serial. (I like step and direction)
4. Determine support options for the motor, encoders, limit switches ...
5. Now you can select your ni card to match the interface, (NI Motion- good for copmlex interfaces and multimotor synchronization, Digital/ counter timers simple but limited conmplexity, less expensive but more software needs to be written)
This all depends on budget and requirements.
Paul Falkenstein
Coleman Technologies Inc.
CLA, CPI, AIA-Vision
Labview 4.0- 2013, RT, Vision, FPGA

Difference between open loop and closed loop mode when finding the index on a stepper motor axis.

I have a test system which uses a PXI-7352 motion controller with a MID-7602 stepper motor drive to position a 200 step/revolution stepper motor with an attached 1000 line encoder. The MID-7602 is configured for 64 microsteps per step, giving 12,800 microsteps and 4000 encoder counts per revolution. The system is controlled using LabView 7.1 and NI-Motion 6.13. To home the motor, I've defined a sequence in MAX which first finds the reverse limit switch and then moves forward to the encoder index pulse.
When finding its reference in open loop mode, the system its reference at the same microstep each time. When findings its reference in closed loop mode, the system finds its reference somewhere within about a 20 microstep wide range.
I hope somebody out there with more experience with this controller can describe the difference between finding the encoder index in open loop mode and finding the encoder index in closed loop mode.
Thanks,
Mark Moss

Hello Mark,
I suspect that the behavior you are experiencing has today
with the resolution difference between your encoder and your
microstepping. Let me illustrate with an
example:
Example Setup
Stepper
Motor
NI
Motion Controller
10
steps per encoder pulse (Every 10 steps the controller gets an encoder
pulse, therefore positions 0-9 all appear to be 0 to the controller)
The
system has a maximum of 3 pull in moves set
Open Loop Scenario
The
system is commanded to go to position 9.
The
controller sends out 9 pulses.
The
motor moves to position 9.
Closed Loop Scenario
The
system is commanded to go to position 9.
The
controller sends out 9 pulses.
The
motor moves to position 9.
The
controller checks its position and sees that it is still at position 0
because it has not received an encoder pulse.
Because
the controller thinks it is still at position 0, it sends another 9 pulses
as its first pull in move.
The
motor moves to position 18.
The
controller checks its position and sees that it is at position 10 because
it has only received one encoder pulse.
Because
the controller thinks it is still at position 10, it sends1 reverse pulse
as its second pull in move.
The
motor moves to position 17.
The
controller checks its position and sees that it is at position 10 because
it has only received one encoder pulse.
Because
the controller thinks it is still at position 10, it sends and additional
single reverse pulse as its third pull in move.
The
motor moves to its final position of 16.
I believe something similar is happening with your
application as it looks for the index pulse.
Because the controller does not compensate for what it perceives as
position error in open loop mode, the motor always goes to the same commanded
position. In closed loop mode, the motor
is bouncing around inside the single index encoder pulse trying to find a
certain position.
There are several recommendations I can make towards
correcting this behavior. These
recommendations are in order of effectiveness:
Setup
your system so that there are more encoder counts per revolution than
steps per revolution.
Turn
off pull-in moves by setting them to 0 in MAX.
Use an
open loop configuration.
Play
around with the pull in window in MAX.
Regards,
Luke H

How can I output a square wave to control a stepper motor using 7332 controller?

I have the following system configuration for testing a linear actuator (LA):
LabView 7.1
NI FlexMotion 7332 Motion Controller
NI Flex DMM 4070
The LA is a stepper motor with Step and Direction of Rotation inputs, as well as some discrete I/O for Power Enable and other functions.
The LA specification only requires that I send a 50% Duty Cycle square wave signal with frequency less than 300 Hz to it in order to make it step. The LA has it's own power source. I only need the 7332 to generate the drive signal and the DOR signal to the LA. Using some of the example VI's, I can get the LA to work, but I will need to incorporate the functions in to a custom application.
How can I weed through the numerous advanced functions the 7332 offers and only generate a DOR signal and a step command at a user-defined frequency. How do I set up the controller for this?
Thanks

Hello,
All the VIs that you can use to create a pulse train and digital I/O from your motion controller are found in the "Analog & Digital I/O VIs" sub-palette in the "Flex Motion" palette. Use "Load PWM Duty Cycle" and "Configure PWM Output" VIs to create the square wave. Use the "Set I/O Port Direction", "Set I/O Port MOMO", and "Set I/O Port Polarity" VIs to create digital output. I hope you find this information useful. You can learn about the specifics of these VIs and their inputs/outputs in the NI-Motion VI Help.
Regards,
Aaron B.
National Instruments

What's the type of control for stepper motor?

Hi,
I'm using PXI-7358 controller, UMI-7774, Industrial Device NextStep third part microstepping drive, stepper motor SANYO-DENKI (type 103-8932-6421, NEMA42) and incremental encoder 3600 ppr (14400 count/round). I want to say what's the NI onboard type of control used to control motor step position? In the case of servomotor the type of onboard control is a PID, in the case of stepper motor what's the type of control? What's the MAX parameters to set for the project specific (overshoot, settling time, rise time etc..)? What does it means "Pull-in Window" e "Pull-in Tries" in MAX? So, it's possible control the stepper motor with user's algorithm control, excluding the onboard control?
Thanks for your patience,
Best regards
Lorenzo

>
Matt wrote:
> Go to SE24. Type in cl_dd_document and press enter. Select the methods tab. Look for the method "CONSTRUCTOR". Double click on it. Click on SIGNATURE button. The types of the parameters are clearly seen.
>
> matt
TYPE and VALUES OF TYPE -- different things. For example, TYPE C -- CHAR. VALUES of this: A, B, C, ..., 1, 2, 3.
Thus, return to question.
TYPES: sdydo_attribute(50) TYPE c
TYPE: sdydo_attribute
VALUES: ???
May be, value ABRAKADABRA correct?

Using LabView, Arduino, and Easy-Driver to control a Stepper Motor

Hello fair folks of the LabView forums!
I am a humble engineering student in need of some advice and input on a project I am working on.
I’ve also done a fair amount of reading on the LabView forums with people trying to use LabView and Arduino to control stepper motors, and I’ve used as much information from each as I could. However the problem I'm encountering now is one which is unique to my VI Configuration.
So, here is what has been done thus far:
-Installed LabView Interface for Arduino [LIFA]
-Installed necessary VISA drivers for LabView to communicate with arduino
-Uploaded firmware to Arduino to allow it to communicate with LabView
-Properly wired Stepper Motor with Easy Driver and Power Supply; I have verified this by first using the Arduino independently of LabView, using example code found here.
-I have created a VI, and have just recently got it to run without reporting back any errors. While I suspect the behavior I’m encountering has to do with something inside the VI, it is difficult to determine as there are no errors being reported!
But here is general problem I am encountering:
-Connect Joystick to USB Port, connect Arduino to USB Port.
-Plug in outlet for Power Supply
-Open LabView VI
-Run LabView VI
-LabView successfully detects Joystick, and Arduino.
-Tilt Joystick; Stepper Motor moves in proper direction, but it only takes a single step. If held, it does not move further. If returned to zero, and then tilted, it again only takes a single step.
I know that in the example code, the Arduino issued the step command by writing the signal from LOW to HIGH, and varied the speed by how often it did this.
I assumed that the Write-PWM feature would do this same thing, but perhaps my assumption is wrong. I will continue to tinker with this myself, but I would be extremely grateful for any insight you might be able to lend.
I’m thinking, if not the Arduino Write-PMW feature perhaps a simple timing-sequence that could be used to alternate between writing 0 and 1, with the timescale of the sequence being scaled to the X-Axis from the Joystick. But, I am open to suggestions, and certainly appreciate any thoughts you may have to offer!
Attached to this is the VI used in this setup, a picture of said VI, as well as a rough sketch of the hardware configuration.
Thank you!
Attachments:
Arduino Stepper Control.vi ‏1224 KB
VI Picture.png ‏82 KB
Configuration Sketch.png ‏522 KB

Hi danjifraga,
I am not so familiar with the Arduino toolkit functions, but you may have better luck looking at the Arduino page at:
www.ni.com/arduino
I'll ask around on Monday to see if anyone is more familiar with the toolkit.
Good luck,
Brian
Brian G.

NI Stepper Motor not putting out enough torque

So I have a motion control system with a P70360, UMI 7772, PXI 7332, and a NEMA 23 stepper motor with 380 oz-in. The purpose of the set up is to rotate horizontally a testing fixture and hold it in position (slowly). Previously the set up was using a motor with 180 oz-in but it was decided that it wasn't enough torque seeing as it wasn't able to fully rotate the fixture, also using a step resolution of 18000, current reduction is disabled, multistepping is enabled, dynamic smoothing is minimal, and load-inertia ratio is set to 0-1.
When the 380oz-in motor was plugged in it was still unable to rotate the platform completely but it wasn't even able to rotate it as far as the 180 oz-in which leads me to believe it was outputting less torque than it should have been. The only reasoning I could think of for this was that there was an issue with the settings somehow where it was limiting the power being fed into the motor for whatever reason. So I walked through the manual (http://www.ni.com/pdf/manuals/372324d.pdf) and it still wasn't giving enough torque.
I also read that decreasing the step size would increase the torque so I reduced it to 200 and it started making a grinding noise, which made everyone in the lab stare at me and start laughing... I immediately hit the kill motor button (I've been controlling it using NI MAX).
So far I can't seem to find anything that mentions the motor making a grinding noise or not pulling enough torque while using the P70360 so here I am asking the community. Why is the motor making the grinding noise (which also seems to become less the higher the step resolution is) and why isn't the motor putting out more torque?
Also of note, I'm an electrical engineer, meaning my understanding of mechanical terms is limited to the basics.
Thanks for any help you can give.
DISCLAIMER: I'm a hardware engineer so I may not be familiar with some concepts/terminology/best practices so... patience is appreciated

I can't get too specific about the dimensions but it's a rectangular platform about 8 inches wide and 25 inches long (axis of rotation goes through the long way). There are also the UUT seating on one side which is what's causing the imbalance but by placing my lab notebook on the other side it balances out. I would estimate my book to weigh around 2 pounds.
The exact weight I'm not sure, the platform is attached to two stands through some type of bearings and the motor is turning a part of the shaft that is sticking out slightly.
On another note though, I decided to attach a oscilloscope to the motor to verify the signals were correct. I had made all the connections, double checked them to make sure all my connections were correct and weren't shorting then turned on the power. As soon as I did there was a white flash from the driver, I turned off the power, and I could smell something was burning. I took the lid off but couldn't see any immediate burn marks anywhere nor was there any visible smoke, just the odor. I decided not to try it again and my principal engineer has been trying to convince me to use another companies motion system. So sadly this may be the last well funded venture into NI motion control I take.
I'm still going to try to get in touch with a rep and see what I can do about it including taking into consideration the possibility of a gearbox but it's going to have to be on my spare time :'(
DISCLAIMER: I'm a hardware engineer so I may not be familiar with some concepts/terminology/best practices so... patience is appreciated

Configure stepper motor with MAX

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