Control.com - Nerds in Control
Company: Bull's Eye Marketing, Inc.
Who is responsible for risk?
Safety risk assessment report
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It looks as if you are saying that a single person can do the assessment,but it will be reviewed by...
Should one perform a formal safety risk assessment?
Working with OSHA inspectors.
Servo Drive reaction when at high speed and torque require exceed max torque on motor.
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Because this is a servo loop with feedback, the system will only demand from the motor wharever is...
DC Motor Speed Control using PID
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George Younkin, a servo expert who passed away on Oct 17, left a copy of all his papers with me.
...
Transfer function of the BLDC Motor
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George Younkin (gwyounkin@charter.net) has authored a number of papers regarding motion and servos....
Help me in my project on DTC of BLDC motor
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Email George Younkin: george@bullseyenet.com.
He has a bunch of papers related to servos and...
One of our engineer did a application its a vertical axis,servo motor connected with a ball screw....
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If the vertical axis is not counterbalanced, it will require current to develop enough force to...
Some technologies have been in development for years, but only a few enjoy commercial success.
Problem winding paper onto a spindle when the spindle motor is in "torque mode"...
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You need an acceleration feedforward algorithm thst takes into account the diameter of the winnding...
i want to know how bearings of motors driven by vfd, worn out early than motors runs with normal speed.
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Are you sure the problem isn't mechanical?
Do you have a flexible coupling between motor and...
i asked about the effects of carrier frequancy on the pwm ac drives. And what happens if it increased or decreased.
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The PWM carrier frequency is like a sample data system. The rule of thumb is that the frequency...
Need to convert transfer function of PMDC motor
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My partner, George Younkin, wrote a paper on this. Send me your e-mail address and I'll forward 2...
Has anyone successfully used a traditional DCS for closed-loop pressure control where fast-acting hydraulic servo valves are the final control element?
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If you close the loop through the DCS and it can only service the loop every half second, your...
friction drive accuracy...
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The number of counts for a 10.7mm step is:
(10.7x96,000)/139.802pi
It comes out to...
About implementing a PID Position controller algorithm to control a PMSM motor with trapezoidal speed-time response.
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Go to the control.com web site.
Under luminaries, select BULL!
Under tutorials select Command...
I ran across a guy recently that I have known for nearly 20 years, but had not seen for a year or two. He is now selling insurance, having decided that there is no real future in the industrial automation business.
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Don't be so pessimistic. Manufacturing employment as a percent of the workforce has been declining...
Can anyone guide me where I can study how to construct a analog PID circuit practically to control a dc motor?
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Use an operational amp with input resistor R and capacitor feedack C. The capactive reactance...
determine hp of motor.
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The RPM and TORQUE that you use in the equation below should come from the upper right hand corner...
2-day servo training addresses posted concerns...
What is the significant value by using a higher resolution encoder over a lower resolution in a motor (specifically in a stepper motor)?
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Obviously, the resolution of the encoder must be better than the least increment of accuracy that...
I need a formula which could plot circle given center and radius.
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Go to control.com.
Look under the BULL! luminary and read the paper entitled
"Command...
I'm developing a homemade Plotter with small permanent magnet DC motors and incremental encoders; using independent proportional velocity control loop for each axis.
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Daniel,
Go to http://www.control.com and look under the BULL! luminary. You will find a paper...
Could anybody plz give me the transfer function of Brush less DC (bldc) motor!
Is it same as that of for commutated DC motor?
Is it same as that of for commutated DC motor?
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I have a paper with that transfer function.
E-mail me and I'll forward it to you.
Tom
Thomas B....
CNC Unit doesn't accept Inductosyn type inputs
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Yes, Inductosyn Corporation out of Valhalla, NY offers just such a device.
There may be other...
Questions about stiffness in motor rotor and integrators in speed loops
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Vikas, If there is nothing attached to the motor shaft, there is no torque. As soon as you grab it...
i am trying to obtain the transfere fuction of the motor of a d.c servo...
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My cohort, George Younkin, has a paper entitled "Electric Servo Drive Motor Equations and...
Does anyone have experience or suggestion how to predict the torque of a servo motor by measuring the input current to the servo motor...
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Look on the motor data sheets and you will find a "torque constant". Its units are...
Need a good servo tutorial for mostly AC type motors.
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Anthony,
We have a 20 page booklet called "Servo Basics for the Layman". Would be happy...
can i use a logo for controling x and Y axes moment.
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There used to be a "rule of thumb". Steppers for 0.5 horsepower or less and DC motors...
Are you using SERCOS for Motion Control? Why should I? Is it the future?
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Go to Control.com and click on the BULL! luminary.
The last 3 Motion Control Forum transcripts are...
Need some info. about G-Codes
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Swamy,
EIA RS 274D used to be the standard for G and M codes, but may now be replaced by a later...
Interested in motion control or CNC retrofit.
Have you got any idea for interpolation using PLC control instead of CNC.
Have you got any idea for interpolation using PLC control instead of CNC.
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If it's the equations that must be solved that you are looking for, go back to the Control.com home...
Can anyone guide us in creating a punched tape for a G&L CNC 800 Control containing the machine constants?
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The expert on the CNC800 is Pete Bartelme. He now works for MachineMate in Fond du Lac, WI.
His...
I want to learn from earlier experience and accuracy achieved by using Asynchronous AC induction motors as an axis drive in Close loop
control for CNC machine tools.
control for CNC machine tools.
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You should be able to do this application with a 10KW or less motor if properly sized, geared, etc....
Looking for guidance on what to charge for writing Visual Basic applications as a freelancer
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$75 per hour is a reasonable number. Or use 2.5 times your base hourly wage.
In WI, you will see...
I have a linear motor working in force control mode. I want to have a rough math model to this motor from reference current to the position...
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Send snail mail company address and I'll send you a 25 page paper on this showing the LaPlace...
Convertor for AC Motor to reduce the speed
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Duc Pham,
A 2 to 1 gear reducer will cut the speed in half
and double the torque. Look up gear...
need to find a way to maintain a uniform delivery rate when driving a soil penetrometer into the ground
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If you use a servo velocity loop, it will
automatically adjust the torque in order to maintain the...
I need help how i calculate times of rizing, falling and constant jerk...
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Send me your snail mail address and I'll send a couple of papers that might help. Sorry, but don't...
Here is the transcript of the Seventh Annual Motion Control Forum (Sept. 2001), which brought together 10 top executives from the Motion industry to discuss the issues of the day.
I am working on the sizing machine which have three DC motors...
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The best solution would be to make all three position servos and command them in parallel. An...
Does anyone know where I can get information on the "new" IEC Motion Control standards, programming tools, function blocks, etc?
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Try Eelco Van der Wal. He is the executive director of PLCopen in the Netherlands. I don't have...
I am generally familiar with inputting a CNC program from a terminal to a Fanuc CNC. What I would like to know is if there is a way to send a command and have the CNC return actual position, target position, velocity, current block...
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Some of the older CNC's were set up to transmit information to a host computer as well as allowing...
from the from student of kolej bandar utama department...
current to voltage converter ( high current )I want to know how to convert a high current(about 10A )to voltage. ...
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Use a low ohmic value precision resistor in the 10 amp line. The precision of the resistor depends...
This paper shows how to compute the
motor/load time constants for standard DC motors and 3 phase AC brushless.
motor/load time constants for standard DC motors and 3 phase AC brushless.
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Dick, This paper is a condensed version of a 6 page paper that I will e-mail to you. We are not...
"Working With Servos" seminar will be suspended until the economy improves. The 2 day (with an optional 3rd day) training seminar on servo basics and the practical application of servos will still be taught in-house during the 2001/2002 season. ...
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