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Looking for heavy duty actuator for outdoor use.
Can a 3 phase DC brushless motor be controlled under a 3 phase AC controller?
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By Ahmed Rehan on 29 October, 2008 - 4:15 pm -
The difference between 3 phase AC controller and DC controller is that 3 phase AC uses sine wave...
Machine DATA
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I am in desperate need for an 'AXIS Card' for my BOSCH CC 100 controller. Not sure which of the...
how can i decide the best ramp time?
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By pk on 28 October, 2008 - 2:44 pm -
No, sorry I don't know about this frequency. Can you explain in detail?...
By pk on 28 October, 2008 - 1:44 am -
Thanx friends,
Yes as I told you, it's not gravity related work. In fact we are pushing and...
By Peter Nachtwey on 28 October, 2008 - 12:29 am -
Yes. What are you trying to do exactly? Are you using closed loop control?
Ramping down too...
By Robert Scott on 27 October, 2008 - 9:06 am -
About the only danger I can see in ramping down too fast is that the cylinder will lose contact...
By Curt Wuollet on 26 October, 2008 - 11:55 pm -
Sure, with hydraulics, motion is displacement. Controlling the flow is controlling the speed. With...
I need some guidance on where and what to use to generate the signals desired.
I would like to control the discharge of a flywheel using current mode control.
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By Hadé on 27 October, 2008 - 3:01 pm -
Thanks Bob,
In fact my motor inductance is 3.3mH from the manufacturer's data sheet. When...
This is more of an electrical engineering problem than a mechanical one.
The problem restated is...
By Hadé on 17 October, 2008 - 3:57 pm -
Hi,
Thanks for the clarification. As for magnetic design, I have some background on that. For my...
By Robert Scott on 16 October, 2008 - 7:55 am -
I am no power supply expert, and I don't know all the details of your application, so I can't...
By Hadé on 15 October, 2008 - 2:03 pm -
Hi,
Could you tell me which special purpose IC would be better for that matter? I wanted to use...
By Hadé on 14 October, 2008 - 5:11 pm -
Ok, but I am not really sure of how I should go about. I would want to use the PIC in order to...
By Robert Scott on 14 October, 2008 - 8:08 am -
If you consider the flywheel output as a discharging battery, then the problem is the same as with...
By Roy Matson on 14 October, 2008 - 6:09 am -
As Robert Scott says, the output voltage will drop with speed because the field is fixed. Does your...
By Hadé on 13 October, 2008 - 8:48 pm -
This is what I want to do. When a flywheel is discharging its stored energy, its speed decreases...
By Robert Scott on 13 October, 2008 - 6:45 am -
You still haven't said what there is that you can control to make the voltage constant. A normal...
What would be a practical method for detecting hand/finger motion?
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Thanks for the suggestions. I might end up using those mentioned flex sensors (if not also...
By M Griffin on 24 October, 2008 - 1:46 pm -
The glove is off the shelf technology. Do a Google search on "glove haptic" and you will...
By Gerrit van der Molen on 24 October, 2008 - 6:45 am -
Hello Pete,
Something like this is being developed in medical robotics for surgery already,...
Can anyone help with advice on the parts needed for a radio-controlled lawnmower I am about to build?
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By Walt Boyes on 26 October, 2008 - 2:13 pm -
Somebody b uilt one a few years ago. Google is your friend.
Walt Boyes
Sent from my BlackBerry®...
By dana rene hoecker on 26 October, 2008 - 3:45 am -
buy a used electric wheelchair. this should give you a base to start....
By howard e. walter on 25 October, 2008 - 9:45 am -
www.evatech.net (not com)...
I am working on automation of Ward Leonard System. This is a constant tension winch system, the Winch Motor speed is controlled though ward Leonard Motor-Generator set.
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Dear Mr. Malik,
I think you may use constant torque AC drive with AC induction motor for...
When two probes are in line, one is getting out after few hours of service, trippping the machine...
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Most of gas turbine has no thrust bearing JATIN. What's the distance between the two axial probes?...
By JATIN on 22 October, 2008 - 11:47 am -
If axial probes are installed in thrust bearing, check thrust bearing collar....
I have three inquiries i need answers to them
Oscillations in control system.
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By George Buckbee on 17 October, 2008 - 8:10 am -
I suggest that you take a look at this PID tutorial:
...
By pk on 13 October, 2008 - 7:12 am -
yes , we are sucking air to get negative pressure.
I need one more information from you guys.
...
Whats best for an in-home simulator?
Need help with choosing a motor/drive system appropriate for operating a radio dish for amateur radio astronomy.
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By M Griffin on 13 October, 2008 - 9:53 pm -
As to whether 78 rpm is "fast enough" is hard to say. A lot depends on the details of the...
Gentlemen,
Thank you very much for the informative replies. You have brought attention to the...
By William Gentry on 11 October, 2008 - 5:47 pm -
You potentially have more than one problem here.
1) The one you've asked about - use of a very...
By Ryan Butler on 11 October, 2008 - 4:43 pm -
Hi,
You may want to consider using an analog (sine/cosine) encoder; these devices can allow...
I need to understand LCI & VSI technology basics...
Block diagram and how to use microcontroller
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By Rahul P Sharma on 1 October, 2008 - 11:17 am -
I believe you meant Atmel 89C52 and not Atmel 98C52...!!
au revoir
Rahul...
By ravi chandar on 30 September, 2008 - 9:59 am -
Hi,
I am ravi chandar doing my B-Tech IV year. Hey, will you first please explain to me about...
Adjusting the PID of a closed loop stepper system to the control system gives unexpected results
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By Peter Nachtwey on 28 September, 2008 - 11:23 am -
>Is there a way to eliminate the grumbling?
Yes, keep the rate of change of the pulses...
By Wolf on 26 September, 2008 - 4:10 pm -
I added a low pass filter at PID input and PID output. The grumbling is minimized. That was a good...
Does anybody have experience with Ethernet IP Stepper Indexer/Drivers?
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By Jack on 25 September, 2008 - 8:27 am -
Hi Everyone,
Can anybody offer their opinion/experience using Stepper controls networked via...
from the Mode selection... really that simple? department...
Servo control mode selection... when to use position vs. torque vs. velocity?How to select the mode?
Why speed and accel/decel differ?
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The things that come to mind are kind of obvious, and not knowing everything about your exact...
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