MID 7654

Hello everybody,
I have been using MID-7654 for like 1.5years for now with the motion controller PCI-7358. I have encountered several problems and I now am controlling 4 different servo motors simultaneously. But today when I powered the system up, the motor connected to the 3rd axis of the MID-7654 wasn't responding to the commands. I opened MAX and saw that when I commanded any thing the motor wasn't moving at all, but the following error was increasing and the axis was killing itself. I tried to assign the axis 5-8 of motion controller to driver and again all axis except axe 3 was working.
Can there be sth wrong electrically inside the driver? Has anyone faced a similar problem? Is there a chance to overcome this problem changing the settings of the axis?
Thanks for all the responses in advance...
Gencer
Solved!
Go to Solution.

Thank you Jochen,
First of all I've never opened a thread with an implicit header like this before but I think this time though I've changed the header the browser sent my query word as a header. I've already tried everything you've offered. I've tried different cables, different motors and also I've verified these components using other axis and they worked.
So as you suspected there would be a very great chance that the MID-7654 has an H/W failure. In that case what can I do, I will check my guarantee situation? Do you think it can be repiared or what?
thanks again...
Gencer

Similar Messages

How do i regulate the voltage/current from the MID 7654

I am trying to control a linear motor using flex motion and the MID 7654 power drive, however there are variuos discprencies between what should happen and what is happening:
1) I have configured AXIS one as an open loop stepper, i have specified a target postion (1000) counts, Max reports movement complete however the power amplifier is outputing 50 volts as soon as motion is started and after it has finished. ( should this value not vary with varying speed and positions, i have tried and it does not ???)
2) If configuring the axis as a servo loop and specifying KP as zero, i still get a max output, should this not be zero also.
3) Follow intiialisation i get maximum output from the power amp. I realise the ax
is must be energised and a holding torque applied, but this is causing the motor to shoot off ! why ??
Any help or advice would be much appreciated !!!!

Hello,
MID 7654 is a servo amplifier and will only work with servo motors. Do not expect anything reasonable to happen when the axis is configured as a stepper instead of a servo as it's not the intended use.
After you configure the axis as a servo you need to tune the PID loop parameters. Until you do that the current sent to the motor will not be correct and you might see unexpected movement on your axis.
Also make sure the current settings of the amplifier matches the ones in the motor's spec sheet.
Hope this helps!
Regards,
Yusuf C.
Application Engineering
National Instruments

How do i Model the MID 7654

I am trying to produce a simulink model in Matlab of my force control system ( A servo motor , connected to the MID 7654, which is connected to the NI 7344 flex motion board, A force sensor connected to ADC-1 closes the loop). In order to complete the system transfer function i need to know what output voltage is being applied across the servo motor as it is this (if my understanding is correct) , which determines the current through the motor, the growth rate of which is goverend by the motor inductance. I know the NI 7344 outputs a signal between +/-10V, how is this acted upon by the MID7645??, the only onfo given in the manual is a current output, surely there must be an accompanying gain applied to the voltage which is then applied to the mot
or which then detemines the current running through the sytem. Any help which could help me better understand the system and produce a model would be much appreciated !.

There is no "characteristic" transfer function for our MID motor controller. That transfer function is going to be the result of the MID in combination with the motor that you are using. The output of the MID is going to be in current. That current is going to be related the current that you select with the MID's jumpers, and the voltage input that the MID receives from the Motion Control Board. This output is characterized by two charts that you can find in the MID's user manual.
MID's user manual
That current output plus the characteristics of your motor should allow you to calculate the relevant transfer function.

Axis resource allocation and the MID-7654

Hello All,
I am currently transferring my application over to use the MID-7654 instead of third party drives. Below is the start up process I am using to allocate the axis resources:
//kill and disable all axes
flex_stop_motion(boardID,0,NIMC_KILL_STOP,0x000F);
  flex_enable_axes(boardID,0,3,0x00);
//unmap all axis resources
  flex_config_axis(boardID,NIMC_AXIS1,0,0,0,0);
  flex_config_axis(boardID,NIMC_AXIS2,0,0,0,0);
  flex_config_axis(boardID,NIMC_AXIS3,0,0,0,0);
  flex_config_axis(boardID,NIMC_AXIS4,0,0,0,0);
//map encoder resources to axes 1 and 2
  flex_config_axis(boardID,NIMC_AXIS1,NIMC_ENCODER1,0,0,0);
  flex_config_axis(boardID,NIMC_AXIS2,NIMC_ENCODER2,0,0,0);
  //enable axes 1 and 2
u8 mask = MASK1|MASK2;
status = flex_enable_axes(boardID,0,3,mask);
Basically, I want to use the encoder resources for each axis for position/velocity monitoring and control the analog outputs directly to change the torque of the motors. Since my impedance control software is closing the position and velocity loops, I do not want to use the PID controller onboard the PCI-7344.
The above code worked fine with the third party drive. However, after starting up my application with the MID drive, all of the orange inhibit LEDs turn on and remain that way (I assume it is to do with killing and disabling all of the axes and not mapping output resources to them). Since I wasn't previously using the inhibit output from the motion controller, my application worked fine with the third party drive (I was still able to read the encoder feedback information).
Also, when I was using the MAX '1-D interactive' interface to verify my encoder feedback, if I move either encoder immediately after initialization the 'Motor off' and 'Following error' lights turn red. I assume this is due to the encoder moving without a command sent from the motor).
Can anyone see any problems with the above code segment or suggest an initialization procedure that would solve my problems. Or if all else fails, is it possible to control the inhibit signals directly to enable/disable the axes on my own?
Wow... I certainly rambled on a bit there.... If you need clarification on any points let me know. Also, I am on a bit of a time crunch, so a prompt reply would be greatly appreciated.
Thanks,
Chad

Chad,
I'm a bit astonished that you don't want to use the PID controller on the board. Onboard PID control is one of the main reasons why you would like to use a motion control board instead of a simple multifunction I/O device. The onboard PID loop of the 7344 can run with up to 16 kHz with very low jitter whilst using the DACs directly from your host application will result in a control loop with less than 200 Hz and a high amount of jitter - even if you were using a real-time OS. This will result in poor control behavior.
This is caused by the architecture of the board. The DACs can be controlled directly by the DSP on the board with high rates in a determenistic way but the host can access them only through the board's µController that runs the host communication in 5 ms cycles that can't be synchronized with the application on the host PC. So for this usecase a combination of e. g. a PCI-6229 (multifunction DAQ board with 4 analog outputs) and a PCI-6601 (4 counters with direct quadrature encoder connectivity) would do a much better job at even a lower price.
With this said I really can't reccomend the usage of a PCI-7344 as a pure I/O-board. Please provide some information why you want/need to choose this approach. There are a lot of options to build customized motion control systems. Please follow this link for some further information.
A key feature of every control system is deterministic behavior so you will need to run your application on a real-time OS. Otherwise you won't be able to get a reliable control behavior.
I can give you some more specific advice if you post some background information about your application.
Best regards,
Jochen Klier
National Instruments Germany

How can i connect the Faulhaber Motor to MID-7654?

How can i connect the Faulhaber Motor (3564 024BC, with Encoder HEDM 5500 B12) to MID-7654?
The Motor has following wires:
A: Hall sensor green; A: Phase brown; B: Hall sensor blue; B: Phase orange; C: Hall sensor gray;
C: Phase yellow; +5V: Voltage red; GND: Ground black
The Encoder has:
5: Channel B; 4: Vcc; 3: Channel A; 2: Channel I (Zero impulse); 1: GND
I don't know how I can connect the encoder to MID-7654 using these wires (what is Encoder Index? Instead of this i only have Channel I !)
Thanks!
WLAN

Unfortunately there are different designators for the encoder signal which NI refers to as encoder index. In your case I am pretty sure that the I channel is identical to encoder index.
Other designators I have found are Z (z-ero signal) and R (r-eference signal) for the index signal.
Make sure that the index signal is at the correct level. For most applications it should be active low (i.e. it should be at high level during most of a turn and go low when the index mark passes the opto switch, I think it should be like this on most if not all Agilent optical encoders as you have it on your motor. This happens for a very small turning angle only and is hard to detect when turning an encoder/motor manually, so if you try to find the index signal turn the motor/encoder veeery slowly.

MID-7654 Current Limits

Hello,
I am using an MID-7654 drive to power DC servo motors with the following specifications:
- Continuous Current: 4.2A
- Peak Current: 21A
- Inductance: 1.92 mH
- Maximum Terminal Voltage: 50V
My original understanding was that the current limit DIP switches on the front panel changed the gain of the system such that a +/-10V input would correspond to the peak current limits (+/-) [Quote from the MID-7654 manual pg 10 - "The MID-7654/7652 varies the gain applied to the input voltage so the maximum input voltage corresponds to a current output equal to the peak current limit, Ipeak."]. Being paranoid like I am, I wanted to verify this thought before doing anything. For current settings of 0.85A/1.7A (cont/peak) I measured a gain of approximately 0.99A/V and for current settings of 1.25A/2.5A (cont/peak) the gain was approximately 1.0A/V (ie: no altered gain). In both cases the output current saturated at the specified continous current limit (for a continuous input voltage).
Based on the above measurements, I have the following questions:
- Do the DIP switches simply change the current limits without altering the actual gain of the MID-7654?
- If this is indeed the case, is there a way to change the gain of the drive such that +/-10V corresponds to a desired peak current range (say 4.2A or 4.9A)?
Thanks,
Chad

Hi David,
I have attached an Excel spreadsheet with the voltage and current measurements I made. I supplied the input voltage by directly accessing the DAC on the PCI-7344. The actual voltage measurements were made from the AOUT block on the back panel of the drive. The current was measured with a DC ammeter in series with the motor, while the output shaft of the motor was fixed in place to prevent motion.
As you can see from the measurements, the motor is not saturating right away and the gain is linear (~1A/V) with a slight DC offset. Voltages higher than those shown in the Excel sheet simply saturated the output current at the level specified by the DIP settings on the front panel. Since the output saturated around the selected limits, I would think that these current measurements are reasonably accurate.
Thanks,
Chad
Attachments:
amplifier_gain.xls ‏20 KB

Mid-7654 - ERRATIC BEHAVIOUR

This is a troubleshooting challenge.
I am using PCI-7344 control card with MID-7654 amplifier driving a three axis dc motor servo system.
Periodically the servo system does not work. There is no drive signal to the motor. At times we have seen commands to one axis result in another axis moving. Because it it intermittent it is highly frustrating.
If I insert a breakout box in the system to try to observe signals on scope, the system only works in one direction and only when scope probes are attached.
Any ideas? I have checked and double checked the wiring. It seems correct. I have tried increasing the drive output of the amplifier and there is no change.

Hi rws,
Could you please provide a wiring diagram (and maybe even some pictures) of how you have it set up? Also, what motor are you using? Has this ever worked before without issues? If so, what has changed?
Jeff | LabVIEW Software Engineer

Can I Connect a 6-wire Unipolar Stepper Motor to the MID-7654/7652?

I am trying to connect a 6-wire unipolar stepper motor to the MID-7654/7652 motor driver and was wondering how the wiring would work on that?

The connector is simply a pass-through for the signals generated by the motion controller card for hooking up to a separate driver compatible with stepper motors. It would be used if you had a combination of servo and stepper motors in your system used in conjunction with separate servo and stepper drives.
-AK2DM
~~~~~~~~~~~~~~~~~~~~~~~~~~
"It’s the questions that drive us.”
~~~~~~~~~~~~~~~~~~~~~~~~~~

Motor Control MID-7654 PCI-7340

Hello,
I'm configuring MAX settings for a servo motor with an embedded quadrature encoder. I set up the motor on Axis-1 and I'm simply trying to drive the motor without a load.
The motor has been able to drive under stepper motor settings, but the move is jerky and I don't have access to the encoder feedback. When I configure the motor as a servo, the encoder feedback is working properly.
Does anyone have any suggestions as to what to try?
Thanks!
-Erin
Solved!
Go to Solution.

climber_girl:
Not sure I understand your post- you have a servo, and when configured as a servo the feedback works.
Why then are you trying to set it up as a stepper?
-AK2DM
~~~~~~~~~~~~~~~~~~~~~~~~~~
"It’s the questions that drive us.”
~~~~~~~~~~~~~~~~~~~~~~~~~~

Don't know how to set current limit for servomotors in MID

My application is to control a servo motor. I�m using PXI-7350, driving a motor (Pittman GM8712F434) with MID-7654. The motor is connected to mechanic parts and mechanic parts are connected to a potentiometer as a feedback. Now, according to the spec of the motor, it said reference voltage 19.1V, inductance 5.4 mH, peak current 1.76 A. So, I set dip switch of MID to 0.85 A for continuous current, 1.70 A for peak current and standard inductance. The motor didn�t move and fault LED lighted. Then I set both continuous and peak current to around 1.7A. The motor still didn�t move and fault LED still lighted. I kept increasing the current until the current hit 3A. It started moving slowly but fault LED still lighted. Final
ly I set the peak current to 3.5A, the motor ran normally. Come to the questions.
1. Is the peak current in the spec same as peak current limit in MID? How to determine peak current limit? Because I�m afraid that my little motor is going to burn out.
2. How to set the continuous current; is it suppose to be half of peak current?
3. If +10/-10V command voltage(torque limit) gets map to peak current (let say 1.7 A), will +5/-5V be mapped to 0.85? And what happen after 2.7 sec if I set continuous current to 0.85A? Will +5/-5V be mapped to half of 0.85?
4. How does �2.7 sec� thing works? When I set peak and continuous current to 3.5A and 1.7A, after 2.7 sec motor should run slower or even stop (in my case), but it went nut like it ran at maximum current.
I set Kp 20 and others zero, everything else is same as default. Thank you, I appreciate your answer.

infoiupui,
There are several DIP switches on the front of the MID 7654 that can be toggled to vary the continuous and peak current values for the MID. There is a small panel that can be removed from the lower left corner of the MID. You can look in the manual for the 7654, linked below, to determine the particular settings that you should use to achieve given continuous and peak current values.
MID-7654/7652 Servo Power Motor Drive User Guide
http://digital.ni.com/manuals.nsf/webAdvsearch/E382785B7D67553E86256A5D0072BBE1?OpenDocument&vid=niwc&node=132100_US
Take a look at pages 10 through 13 of this document for information on how to modify those DIP switches to achieve current values that will work with the motor that you are using.
I am not clear on w
hat you are referring to when you referred to 2.7 seconds. Could you clarify that for me?
I hope that helps! Let me know if you have any additional questions on this issue.
Regards,
Scott R.
Applications Engineer
National Instruments

How do I use the analog input (ADC) to drive a motion profile in MAX

We are trying to use an anolog input signal from a DAQ card to control the motion contol axis. For now, we want the motor speed to follow a sinusoidal voltage waveform, and later on, we will be using a more complex velocity profile.
In order to accomplish this task, we have searched the user forum, and found information suggesting to operate the servo motor in 'slave' mode under the 'gearing' option. Therefore, we have set the Gear Master to 'ADC Channel-1', Mode set to 'absolute', Gear ratio 1:1, and provided the sinusoidal voltage (+/- 5V, 3 Hz) to the AIN1 connector on the MID-7654 controller. When using the 1-D Interacitve 'single axis' control panel, the motor runs at constant speed in one direction only. It does not react to the sinusoidal speed profile request as we expected.
How do we 'turn on' the 'slave' mode in MAX? Please talk us through the necessary steps and settings? Thanks.
Staffan

Staffan,
you can configure and enablethe Gearing mode in MAX and it should be activated after saving the settings and initializing the board. In 1D-Interactive you can't use Gearing. For better flexibility I recommend not using MAX for configuring and enbling Gearing. You better should do this in your application.
In fact there is a perfect LabVIEW-example that ships with the NI-Motion driver (Master Analog Input - Slave Axis Gearing.vi)
I hope this helps,
Jochen Klier
National Instruments
Message Edited by Jochen on 10-02-2007 08:37 AM
Attachments:
gearing.jpg ‏162 KB

How do i extend the bandwidth of my system

The control problem I am having is extending the bandwidth of a force control system. The system is used to apply mechanical load to bone to facilitate research into Osteoporosis. The following concisely describes the system and the different things I have tried to solve the problem,. I imagine it is quite lengthy compared to the usual questions but any advice you have to offer to a Mechanical engineer would be much appreciated.
System Description:
I am using Labview (with Flex motion) to program the NI 7344 motion control servo board (PID update rate of 62.4 micro-seconds). This output signal is then amplified by the MID 7654 power amplifier, supplying current to a Voice coil (this can be considered as a Linear DC motor with a bandwidth of 40Hz). This applies the force to a bone sample. Feedback is then provided by a load cell and connected to the ADC feedback channel of the servo board. (For full specs of all mentioned components please refer to the web links which are listed at the end of this email!)
Problem description:
After optimally tuning the PID characteristics and defining the amplitude and pre-load, I can successfully control a continuous, sinusoidally varying force (frequency 1Hz), however when I try to increase the frequency to 10Hz, the amplitude of the output waveform is marginally reduced�i.e. there is attenuation. I know that the bone sample is not viscoelastic enough to act as a low pass filter. The bandwidth of the Voice coil is not a limiting factor either, so�..
How do I extend the bandwidth of this system?
The following Paragraph describes some of the things I have tried, which have had some or no influence. Being a mechanical engineer I would be grateful for any expert advice.
(Note all results have been verified with an oscilloscope where applicable)
Influential Factors:
1) Method of programming.
To generate the wave form a series of points describing one period are written to a circular buffer on the servo board. The points are executed in 10 milli-second intervals and are splined through using a cubic spline algorithm (hence a period described by 100 points gives us a frequency of 1Hz and a 10 point wave gives us 10Hz). All this happens on the servo board in real time. I am confident that although the integrity of the sine wave is reduced at 10 Hz the amplitude is still described within the 10 points and so is not the reason for attenuation. However this does limit the maximum frequency achievable. (I would say the max frequency is about 20Hz)
2) Redefining the resolution of the of the ADC Feedback
The 12 bit ADC feedback channel is scanned at a rate of 50 micro seconds (faster than the loop update rate which is 62.4 micro-seconds). Initially the voltage range was specified at -/+ 10 V giving 20/(2^12) Volts per significant bit, however I noticed that when I increased the resolution to the max possible by changing the range to 0-5 V (giving 5/(2^12) volts per significant bit), the amount of attenuation was reduced, however there was still some attenuation there. This begs another question why would this factor improve the frequency response???
3) PID characteristics
The system gives an optimum step response when using only a pure integral term and setting Kp= 0, Kd= 0. It seems as though the fastest step response is limited to about 6 milli-seconds. The system is fine tuned and any slight increase in the integral term results in immediate instability. Therefore there is no scope to improve the system bandwidth by altering the PID characteristics.
Can you offer me any expert advice?
Considering this information, what would you advise? Do I need a board with a faster loop update rate ?, I have considered using Labview Real Time, which offers a board with a 26 KHz update rate as apposed to the 16Hz (62.4 micro-seconds) provided by the current board). Do I need to use different control algorithms as apposed to PID, if so which ones???
Any help or advice you have to offer would be much appreciated and could help in the battle against osteoporosis. Should you require more information or would like to speak to me send me an email and I can answer any further questions or give you a ring.
Regards Duncan Webster
Email: [email protected]
Product specs:
Servo board:
http://www.ni.com/pdf/products/us/4mo636-637.pdf
Power amp
http://www.ni.com/pdf/products/us/4mo642-643.pdf

Hi Duncan,
i'm sorry that this answer took this long, but i think a constructive answer which takes a long time is better than a useless answer in a short time....
For the following thought-provoking impulses we have to consider the signal-change when increasing the frequency. The points which describe the signal get streched over the period. Increasing the frequency enlarges the distance between the points.
a) The spline algorithm could be the problem here hence the signal does not correctly pass through the points anymore with increased frequency. Therefor the amplitude decreases with increased frequency. Perharps another kind of spline algorithm can be helpful.
b) Another point can be the control deviation. Since a feedback control system needs a devia
tion for the control, the deviation gets larger when increasing the frequency of the controlled loop. Maybe the control loop has to set the desired value when already getting to a new point. So the signal could get "washy" and the maximum amplitude is reduced.
In this case, the "Velocity Feedforward"-parameter could be of use. This parameter is to use with caution for it can have similar effects like a too high chosen integral term.
c) You can try to set the 7344 to circular contour. Therefor use 2 axis where you use the second axis as dummy (open step). There is a major disadvantage in this setup: since you use 2 axes at the same time, the 7344 can update each axis only with 125 microseconds. But perharps this is sufficient. Either way the parameter of the control loop have to be adapted (integral term reduced).
d) If the 125 microseconds describend in c) is insufficient, you can try to test it with a 7352. The 7352 can handle 2 axis at a time with a update rate of 62.5 microse
conds for each axis.
I hope this answer helps you in solving your rather special issue.
-Norbert
NI Germany
CEO: What exactly is stopping us from doing this?
Expert: Geometry
Marketing Manager: Just ignore it.

Toolkit for feedback system? Motion; PID; Control/Simulation???

Hi, I have to develop/program an organ bath system - a feedback system mimicking real sinusoidal breathing oscillations (shown in attached images). I have NI Labview 8.5, NI-Motion 7.6, a linear motor (M-235 DC-Mike actuator), an MID-7654 Servo Power Motor Drive and a pressure transducer. I believe I will need to control the PID controller and am aware of the PID Control Toolkit as well as the Control Design and Simulation Toolkit for NI Labview. However, is it possible to control the system using the NI-Motion software I have at the moment? If not, do I have to purchase both the PID and Control/Simulation Toolkit or just one? Thanks in advance...
Attachments:
feedback design1.JPG ‏25 KB
feedback system1.JPG ‏42 KB

Dear Garry,
Do you have a motion controller to interface the MID-7654 to your
computer and LabVIEW? This would be the PCI-734x or PCI-735x. If you
do, I believe that you could implement your application with LabVIEW
and NI-Motion. You could do so by using the analog feedback feature for
the control loops for each axis. Then, you could specify the optimal
sinusoidal moves/pressure patterns that mimic real breathing patterns.
The analog feedback from your pressure transducer will be used during
the move(s) to maintain the pressure that you want.
Please see Chapter 13 here for more details:
NI-Motion User Manual
http://www.ni.com/pdf/manuals/371242c.pdf
Here is also a good discussion forum post on Analog feedback:
Can i use NI-7358 to implement a hybrid position force/torque control system?
http://forums.ni.com/ni/board/message?board.id=240&thread.id=2976&view=by_date_ascending&page=1
I believe that the above option would work for you, and you would not
have to use the Control Design and Simulation Module or the PID
Toolkit. Please let me know if you have any additional questions. I
haven't actually set up a system with analog feedback from a pressure
transducer before, but I believe that the above would be a very viable
option.
Best Regards,
~Nate

Motion assistant labview

hi
I have to control a motor speed using the PcI 7342 controller.
I have MID 7654/7652 servo motor drive and NI motion assistant.
MY hardware connections are proper.
I am using motion assistant to generate a arc move and then generating labview code .
I have inserted just a knob in the front panel to control the speed and made a slight modification in the block diagram to insert the knob in the place of velocity.
Now i am not able to stop the motor .
Can anyone help me to insert a stop button in the labview diagram.
Should i use configure inhibit output flex or just use the stop button in flex motion.?
i have attached the labview diagram....
Pls help me.
thanking you
sumitha ravindran
Attachments:
labvie diagram.vi ‏49 KB

Hello Sumitha,
The code generated by Motion Assistant is designed to run the arc move once and stop at the end of the move. The Arc Move step of the LabVIEW diagram is setup to wait until the move completes before stopping. There should be no need to add a stop button (or the Stop Motion VI) if the motor is configured properly. If this is the case, you should see the VI hanging in the Arc Move step. Is this what you see? Can you perform a straight line (point-to-point) move?
I noticed that you have another similar discussion forum post here. You most likely will need to solve the motor configuration issue first (which may also solve this issue).
Best Regards,
Jesse D.
Applications Engineering
National Instruments

Encoder polarity

Hello,
I'm using a MXI controller card to a PXI 7344 motion controller and a NI MID-7654 servo drive.
The servo works, but the encoder counts in the negative direction. I can changed "line A" to active high and the encoder counts positive, but the motor moves too far and I get following errors. I have tried different combinations of lineA/LineB/index active high/low, but the current setting is the only way that I have found to avoid the errors. Any suggestions?
Message Edited by vt92 on 03-12-2009 03:46 PM
"There is a God shaped vacuum in the heart of every man which cannot be filled by any created thing, but only by God, the Creator, made known through Jesus." - Blaise Pascal
Attachments:
encoder.PNG ‏43 KB

I agree with AK2DM. There is no standard that defines which is phase A and B of the encoder, so you typically have a 50% chance to find the correct setting right from the start. In older NI-Motion versions you would have had to change the wiring, but in newer versions you just need to adjust the settings in MAX.
If your motor still doesn't move correctly, this sounds like a tuning issue. Please visit the Understanding Servo Tune tutorial for more information about this topic.
Regards,
Jochen Klier
National Instruments

MID 7654

Similar Messages

Maybe you are looking for