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Control.com topic...
Motion Control
Topic: Motion control, servos, steppers, etc.
from the Forum department...
Communicating with Parker SSD drive
Originally posted by Tom on 20 March, 2013 - 8:53 am
My new service laptop doesn't have a serial port and it seems parker doesnt make any cables to talk to their drive that go through USB.
New Replies:
Use a USB to serial adapter. Hook it to the SSD adapter. if you don't have the SSD adapter call...
Originally posted by Ben on 16 May, 2013 - 5:32 pm
Several steps of external resistance used for speed control on motor appear to have uneven amounts of resistance. Is this possible? What will the effect on the motor be?
New Replies:
Ben, using the procedure I suggested illustrates how the number of speed-torque curve increments...
Phil, Again appreciate your valued comments. It's people like yourself that keep the world...
Ben... this sort of problem can be solved using Symmetrical Components Analysis! Say the...
Phil, Really appreciate your response. Unfortunately all i've got is a really poor wiring /...
Ben... please provide operating data: a) Line-currents. b) Supply phase-phase voltages. c)...
Topic: Motion control, servos, steppers, etc.
from the mechanical design department...
control of servovalve
Posted by george on 18 May, 2013 - 3:26 pm
synchronization of 2 servo valves that control 2 cylinders
Topic: Engineering and workplace issues.
from the Forum department...
Implementing PID Controller with C++
Originally posted by tvlas on 6 March, 2013 - 3:28 am
Question about how a PID Controller might be implemented in C++. How to go from continuous to discrete signal in C++?
New Replies:
> Here is our implementation for closed loop controllers in C++: Yeah,I concur that are truly...
Topic: Motion control, servos, steppers, etc.
from the How is independent control possible department...
Torque and speed control in BLDC motors
Originally posted by Sadiq Mohamed on 17 June, 2010 - 7:55 am
I want to know the details of a speed control for a BLDC motors. I want to know the relation between the torque variation during speed control.
New Replies:
Hello all, In your situation is very useful to search the information provided by PIC's...
Topic: Motion control, servos, steppers, etc.
from the Forum department...
Basic (I think) signal conversion question
Originally posted by Kenny on 9 May, 2013 - 2:09 pm
Convert rs422 to 4-20mA?
New Replies:
Hi all, What you wanna do is converting incremental encoder signal into absolute position....
> I can only get the magnet strips with rs422 output (I gather this is essentially...
Even though I am big on DIY and clean solutions, my suggestion was based on the fact that it's easy...
Hi, the first question is (according to this last mail): what is the protocol used by RS422? ...
You might keep looking, that range is often used in machine tools and there are some low cost...
there are encoders that have an Ethernet output. I don't know of any rs422 to 4-20mA converters....
Originally posted by Jim on 27 August, 2012 - 1:29 pm
I have 3 different VFD brands I would like to control using Modbus RTU. I have a Prosoft MVI46-MCM card in a SLC 5/04 rack.
New Replies:
My apologies -- that sample WAS for a 3150 (which at least at that time you had to configure as a...
Thanks for all the replies. I already have the Prosoft card, so no need to pay for firmware...
SLC 5/03 5/04 and 5/05's all speak Modbus natively There is no need to purchase a $ 1,500...
Topic: Motion control, servos, steppers, etc.
from the BLDC motor control department...
BLDC motor control
Posted by stanley on 10 May, 2013 - 11:21 am
BLDC motor speed control, constant torque at low speeds.
Topic: Motion control, servos, steppers, etc.
from the Forum department...
Control a DC motor using PLC
Originally posted by Eric on 21 January, 2011 - 3:53 pm
Help with RPM controller
New Replies:
By Doug Hitchcock on 9 May, 2013 - 4:53 pm -
I'm curious to get feedback on the need for open-loop motor control in SCADA systems, especially...
Topic: Motion control, servos, steppers, etc.
from the Hydraulic department...
A10VSO71 And VT5041-3X (Rexroth)
Posted by Acramatic on 6 May, 2013 - 12:30 pm
Closed Loop Control Axial Variable Piston Pump (Hydraulic)
Topic: Continuous process industries, DCS questions.
from the Instrumentation department...
KTK Thyristor drives
Originally posted by Sandeep on 7 July, 2004 - 12:16 pm
KTK Thyristor drives FAC 1R
New Replies:
Hello. Did you come across an answer for the inst trip question on a KTK board on a Bridgeport...
Topic: Power generation equipment control.
from the Forum department...
GE servovalve moog G771K616
Posted by SALVADOR on 20 April, 2013 - 9:43 am
G771 Moog servovalve and a G123-825 buffer amplifier for a gas turbine.
Topic: Motion control, servos, steppers, etc.
from the Forum department...
BLDC transfer function from step response
Posted by eekks on 19 April, 2013 - 6:31 pm
hello,
can anybody give me a method to work out the transfer function from a step response?
Topic: The Business of Automation and Control
from the MV AC Drives department...
How big is the MV AC Drives market in India?
Originally posted by NKS on 28 August, 2011 - 3:51 am
please share your views on the MV Drives business in India,
I am doing a market research report for India...

New Replies:
Hi NKS, India is always a Growth Region market having huge potential for MV AC Drives. ...
Originally posted by Mahesh Thapaliya on 8 January, 2009 - 8:25 pm
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:
Dear Gopi, Please contact me at balla.venugopal@gmail.com Thanks, Venugopal Balla Mumbai, India...
Topic: Motion control, servos, steppers, etc.
from the Forum department...
encoder count wrapping
Originally posted by satyan on 10 April, 2013 - 2:32 am
Can any one help for coding encoder counts wrapping?
New Replies:
How you handle wrap-around of encoder counts depends on what you are doing with it. If you are...
Topic: Motion control, servos, steppers, etc.
from the Repair department...
Mavilor MO4500 Servo motor
Posted by Sergey Chekh on 10 April, 2013 - 1:53 pm
Info for Mavilor MO4500
Topic: Motion control, servos, steppers, etc.
from the Automation List department...
Standard for Encoder Gray-Code
Originally posted by Mark K on 21 August, 2001 - 1:17 pm
I'm looking for a standard gray-code table, if one exists.

New Replies:
> Might as well use a 256-byte lookup table for an 8-bit code. I'm not sure how far back the...
Topic: Motion control, servos, steppers, etc.
from the ELECTRICAL department...
LOW RPM BLDC MOTOR
Posted by KIRAN on 3 April, 2013 - 10:12 am
Up to how much low rpm can a BLDC motor be designed?
Originally posted by Yegor on 2 April, 2013 - 12:19 am
I need to choose an encoder and a PLC to make a rotary table that could be positioned with precision of about 60 arcseconds.
New Replies:
Control Technology Corporation (CTC) has a controller with built-in motion control to handle the...
I had forgotten about those large, cylindrical (typically hollow) direct drive motors. I used a...
In general unless there are requirements dictating gearing I would go direct drive (I was thinking...
Something occurred to me. 21600 counts per turn is only 60 counts per degree. 60 arc seconds...
A few thoughts to get you started: You probably want your final position-loop encoder on the...
It is likely you can make it work with a PLC. There might be simpler ways to handle it with motion...
The proper selection of a motor and gearing would be the first item, the proper electromechanical...
I have done turntable applications with Renishaw ring encoders. Look at the Signum and Resolute...
Topic: Motion control, servos, steppers, etc.
from the MOTION INTEGRATION department...
CONTROL TECHNIQUES SERVO DRIVE INTEGRATION
Posted by Chris Keith on 2 April, 2013 - 4:31 pm
Control Techniques Multi Axis Application
Posted by nagarajan on 2 April, 2013 - 3:01 pm
we are having 15 number of Ring main units with Schneider 11kv,RE2c type.we need a detector which will detect from outside of cable, we are using trefoil 630 sqmm xmpl cable.Any sensor's available,just we need to know which RMU's powe
Topic: Power generation equipment control.
from the ABEX 425 department...
Abex Servo Failure Mode
Originally posted by JFBjr on 30 March, 2013 - 11:46 pm
Abex 425 servo valve failure experaince
New Replies:
the big problem is there is actually lack of evidence there is a problem. the slow opening was...
Servo strainers can plug very quickly, in minutes if there is enough contamination. We once had a...
Thanks, That is the most common problem and is being considered. The customer has a very...
We have 27 Abex 425 on site on 35 year old turbines. The cause of your problem is likely a plugged...
Topic: Motion control, servos, steppers, etc.
from the Need all information department...
servo motors and absolute positioning
Originally posted by Herman Rooijakkers on 20 October, 2004 - 6:20 pm
Who can help me with finding training documents about the working principle of servo motors in combination with a absolute positioning encoder??
New Replies:
FYI, they may have changed to orocos.org if not already there. >There is also open source...
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