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The threads that wouldn't die...
- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
- PC reliability?
- Windows, real time
- PID loops
- PCs vs. PLCs
- Replacing people
- MS 'monopoly'?
- Software quality
- Where do we go from here?
- Why pay?
Fortune
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you knowing nothing?"
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you knowing nothing?"
-- Lloyd Cole and the Commotions
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We are re-implementing the motion control of an astronomical telescope, and need to include complex calculations (in C code) into the position loop.
New Replies:
Thank you very much for spending your time and efforts... your views are most interesting, and very...
By M Griffin on 19 November, 2009 - 2:23 pm -
For each axis you will have a servo motor and drive. The motor will have its own encoder which will...
Hi,
Thank you very much for all the answers.
It is true that telescopes are mainly controlled...
By M Griffin on 18 November, 2009 - 6:33 pm -
The first thing I would do would be to ask the other observatories how they are running this...
Hello Wim:
Our controllers have been used for many years now on many of the large telescopes...
Would like to setup a alt71 to comm. with our plc quantum with a noe77111 card.
New Replies:
Hi,
yes it is modicon cpu, with unity software. After a bit more reading i am able to send...
What type of device are you going to use to control the Altivar 71 Drive? If it is a Modicon PLC,...
Machine which we are going to do with Rotart shear cutter for cutting metal sheets from 800 mm to 5000 mm
New Replies:
I agree that the rotary cutter should not have to stop between cuts. With a decent controller you...
your customer is correct you should be able to develop a profile for constant motion... you...
CANOpen technologies
New Replies:
By Joe on 15 November, 2009 - 4:48 pm -
Have a look at http://www.canopen.nu.
...
>HBC-radiomatic has a wide range of radio remote controls with CANOpen interface.
...
from the Electrical engineer department...
Medium Voltage Variable Frequency Drive to Control the Speed of Motor
I am electrical engineer by profession and currently I am doing research on medium voltage Variable Frequency drive (also called as VFD, VSD, AC drive, VVVF, etc.)
New Replies:
By chad on 13 November, 2009 - 10:18 pm -
buy a new motor and drive approx 500hp 480v...would be less than 100,000.00 usd...
By Kislay Nigam on 9 November, 2009 - 2:54 am -
Dear Mr. Imraan Qureshi,
U/s came to know about your requirement, & would like to tell you...
Does anyone know how to stop the posts (AB talk for the start-up self-test loo)???
Looking for replacement units for obsolete 55M Controllers.
New Replies:
By terry on 12 November, 2009 - 4:11 am -
> A year to late but I would look into a Becker pneumatic controller. <
Could you please...
Both hazardous and non-hazardous area have active power loop. What type of safety barrier to be used?
New Replies:
By Ger on 10 November, 2009 - 11:14 am -
Signal Isolator required here, P&F KFD2-CD-eX1.32. This will require A 24VDC POWER SUPPLY. or...
How to setup a good PID controller for dc motors you do not have information about. All the motor parameters are unknown. Is it possible to achieve all the motor parameters somehow?
New Replies:
For tuning each servo axes separately as first step, Application Note from Galil maybe suggested:
...
By Ken E on 6 November, 2009 - 8:09 am -
What type of feedback are you using to control the DC motors? If you use
a decent encoder to track...
for my project title i want to control the position of AC servo motor
need to scale down the voltage in to 0 - 9 for running the motor in safe side
New Replies:
By M Griffin on 2 November, 2009 - 2:07 pm -
The normal method of doing this is to use a signal conditioner module with a DC input and a DC...
i m facing difficulty while generating the transfer function of Ac servo motor
Trying to find a Positioner for a rotary actuator (Keystone 79u) that works off of Profibus DP Communication.
stupid questions most likely
New Replies:
Thanks for the input! ...
By M Griffin on 28 October, 2009 - 3:37 pm -
Since you are gearing up, if you used a worm gear you would be using the spur to drive the worm....
By Jake H. on 28 October, 2009 - 9:09 am -
Thanks Bill,
Say if I went with gears, being nylon or not, and the shaft cams (that would be the...
By William Sturm on 27 October, 2009 - 6:41 pm -
Gears would put less overhung or side load on the shaft. Any deflection will cause major issues at...
Can anybody told me how to tune Baldor Linear motor .
New Replies:
By William Sturm on 27 October, 2009 - 11:52 am -
First double check all electrical connections. Assuming you have done that, start by setting...
OK, but I need more details of your application:
- Microflex operation mode (i.e. current or...
By Edwin on 27 October, 2009 - 12:40 am -
Linear encoder: -ATEK MLS1 series linear encoder with hall sensor.
Presently I am able to...
What type of linear encoder with Hall sensor do you have? Can Microflex drive perform brushless...
I need ideas for my project on Automated Control of Manufacturing Systems
Asymmetrical ZC detection at rising and falling edges
How to change operation between motor, and generator?
New Replies:
Conceptually, if you are applying torque to the motor in the same direction as the velocity, you...
My son's razor E100 scooter stopped working and I believe it's the motor controller.
New Replies:
By Sam on 18 October, 2009 - 7:04 pm -
I wish I had seen this post before I bought the new control boxes. They are available on Razors web...
what's best braking for dc motor??
New Replies:
By M Griffin on 13 October, 2009 - 8:25 pm -
If you are using dynamic (or regenerative) braking, then the generated voltage at any speed will be...
but if we use large voltage or current, isolation in motor can broke. I want time respond for...
By M Griffin on 13 October, 2009 - 2:08 am -
The "best" value depends on what criteria you consider to be "best". A higher...
yesterday, i discuss with my university instructor. he suggest me for use regeneratif braking..
...
By Mike on 12 October, 2009 - 8:13 pm -
Big motor or small? how fast does it have to stop? Dynamic Braking is a common brake function used
...
Encountering problems in setting up a current sensor for current control in a BLDC Motor
New Replies:
By Curt Wuollet on 13 October, 2009 - 4:13 pm -
Hi
What I am saying is that if you measure the voltage to ground from either end of your current...
Thanx.......
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