Welcome to Control.com, the global online community of automation professionals.
Control.com - Nerds in Control
Member Login
Search
Jump to a Date
Sponsored Communities
Cool stuff
Twitter Feed
Neat Stuff
Visit our shop for nerds in control lifestyle products.
Thermal Overload
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
Experience is something you don't get until just after you need it.
-- Olivier
-- Olivier
RSS Feed
Use this link to get an RSS feed of the Control.com article flow, for private, non-commercial use only:www.control.com/rss/
To get a personalized feed, become a member at no cost.
what's best braking for dc motor??
Encountering problems in setting up a current sensor for current control in a BLDC Motor
New Replies:
By Leonid on 11 October, 2009 - 3:03 pm -
Another difference amplifier from Analog - AD629 - maybe strongly recommended instead AD620 used...
Thank you for your prompt reply....I was out of station for a couple of days..hence could see it...
By curt wuollet on 7 October, 2009 - 1:06 pm -
It's hard to say without seeing your circuit, but it sounds a lot like you are taking one or both...
Need a PLC that runs on 12 volts and supports IEC 1131-3 Structured Text.
New Replies:
Beckhoff has a large range of controllers that use their Twincat IEC 6-1131 software, allow you to...
from the Electrical engineer department...
Medium Voltage Variable Frequency Drive to Control the Speed of MotorI 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:
Better you go for MV drives with Multi cell technology which are now a days comparatively very...
Dear Mahesh sir,
I am also an electrical engr. now working with PRAN_RFL GROUP, Bangla desh. I...
It's clear that close loop is better than open loop control but...
New Replies:
By William Sturm on 5 October, 2009 - 9:34 pm -
A tachometer only provides velocity information. An encoder typically provides position...
Sorry for my inadequate information. It is actually a school lab that I have done on testing the...
By William Sturm on 5 October, 2009 - 11:46 am -
You have not provided enough detail of your system. What are you trying to control? What do you...
By Ken Emmons Jr. on 5 October, 2009 - 10:46 am -
What are you trying to drive? An inverter with induction motor?
Permanent magnet 3 phase servo,...
I am doing a project on controlling the speed of a single phase shaded pole -permanent magnet- ac motor.
New Replies:
By M Griffin on 4 October, 2009 - 4:32 pm -
An ordinary shaded pole motor can simply "slip" a lot when driving a fan. That's how you...
Ok. maybe Frequency .. Can you present to me some project about this....
By curt wuollet on 3 October, 2009 - 5:45 pm -
You can actually achieve a degree of speed control with wound field shaded pole motors with...
By M Griffin on 3 October, 2009 - 5:13 am -
So far as I know, that is a synchronous motor and the speed depends on the frequency, not on the...
What type of equipment is needed to duplicate commercially available motion platform designs using off the shelf equipment?
New Replies:
It has been several years since you posted this inquiry. I have the same interests and have spend...
AB Max/Control Motion Control Software needed
Can anyone help with advice on the parts needed for a radio-controlled lawnmower I am about to build?
New Replies:
By mack2k on 29 September, 2009 - 8:15 pm -
I would like to see your mower if I may. I am building one now and would like to correspond with...
Need help controlling the rpm of a motor
New Replies:
By Roy Matson on 25 September, 2009 - 1:38 am -
In the early days of SCRs we used to make our own speed controllers. I couldn't remember the...
Yea from what i remember (which isn't much). the way those light dimmers work is there a little pot...
By M Griffin on 23 September, 2009 - 4:24 pm -
The light dimmer or variac plus transformer plus bridge rectifier combination that Ken Emmons Jr....
By Ken Emmons Jr. on 23 September, 2009 - 8:44 am -
Like Mr Griffin has said, a power resistor in series with the motor should work, its not variable...
By M Griffin on 23 September, 2009 - 1:54 am -
A dimmer switch won't work, as those are meant for AC. A potentiometer would work, but you would...
urgent Encoder figure out problem
New Replies:
By Bruce Durdle on 23 September, 2009 - 6:37 pm -
If you trigger RB0 and set up an interrupt on change, then the direction of rotation will be...
By William Sturm on 23 September, 2009 - 6:30 pm -
If you connect ABC to port B 0, 1, 2 respectively, you may be able to use the Port B interrupt on...
By vibz86 on 23 September, 2009 - 1:41 pm -
I thought of connecting channel A to port B int pin (rb0) and connecting channel B to RB4. Then...
This is a quadrature encoder with single ended outputs?
Bill is right
Andre, ...
By William Sturm on 21 September, 2009 - 2:05 pm -
I won't answer in great detail, mostly because the information is out there to be Googled. ...
For the decoding logic, just google "quadrature decoder circuit" or similar. One good...
By Mike on 21 September, 2009 - 2:22 am -
5 wires? What are the colors, i would think Sine, Co Sine but 5?...
Thanks Bill for the information..
One more clarification. I'm using pic16f877a to control the...
By William Sturm on 20 September, 2009 - 2:52 pm -
I would guess that it is a quadrature encoder with single ended outputs. The outputs may be either...
Some technologies have been in development for years, but only a few enjoy commercial success.
New Replies:
By M Griffin on 23 September, 2009 - 4:24 am -
If I knew the answer to all that for sure, then in 3 to 5 years I would probably be pretty rich. I...
One of our engineer did a application its a vertical axis,servo motor connected with a ball screw....
New Replies:
By William Sturm on 22 September, 2009 - 2:48 pm -
It could be unstable at low speeds which could cause an oscillation. Or maybe it is an issue of...
If the vertical axis is not counterbalanced, it will require current to develop enough force to...
By Ken Emmons Jr. on 22 September, 2009 - 8:01 am -
To ask this question as a function of speed only is not enough information.
If I were to guess...
new DC servo motor not running at high speeds
New Replies:
By Ken Emmons Jr. on 22 September, 2009 - 8:05 am -
Are the brushes getting stuck maybe? Does there seem to be a lot of debris or anything when you...
What are the difference between PLC and motion controllers
New Replies:
Modern motion controllers are closer to PAC vs PLC because except possibility to perform complex...
This is like opening a can of worms. My opinion is those who were historically Motion Control...
By James Ingraham on 21 September, 2009 - 10:37 am -
> What all are the main difference between PLC and motion controllers? <
Well, the line is...
A question that has been on my mind for some time...
New Replies:
By Edwin on 22 September, 2009 - 1:08 am -
Its very bad that companies charging for their own software. There are Companies like Baldor will...
Moog servo valve models interchangeability
New Replies:
Hello,
Hope We can help you about this servo valve. We can produce the servo valve for you to...
Your use of this site is subject to the terms and conditions set forth under Legal Notices and the Privacy Policy. Please read those terms and conditions carefully. Subject to the rights expressly reserved to others under Legal Notices, the content of this site and the compilation thereof is © 1999-2009 Nerds in Control, LLC. All rights reserved.
Our Advertisers
Help keep our servers running...
Patronize our advertisers!
Patronize our advertisers!