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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.
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Use a USB to serial adapter. Hook it to the SSD adapter. if you don't have the SSD adapter call...
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?
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Ben, using the procedure I suggested illustrates how the number of speed-torque curve increments...
By Ben on 18 May, 2013 - 5:30 pm -
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...
By Ben on 17 May, 2013 - 6:16 pm -
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)...
synchronization of 2 servo valves that control 2 cylinders
Question about how a PID Controller might be implemented in C++. How to go from continuous to discrete signal in C++?
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> Here is our implementation for closed loop controllers in C++:
Yeah,I concur that are truly...
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.
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By George C on 15 May, 2013 - 1:12 pm -
Hello all,
In your situation is very useful to search the information provided by PIC's...
Convert rs422 to 4-20mA?
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By anonymous on 13 May, 2013 - 1:13 am -
Hi all,
What you wanna do is converting incremental encoder signal into absolute position....
By Bill Sturm on 12 May, 2013 - 9:05 am -
> I can only get the magnet strips with rs422 output (I gather this is essentially...
By Curt Wuollet on 11 May, 2013 - 12:50 pm -
Even though I am big on DIY and clean solutions, my suggestion was based on the fact that it's easy...
By Bruno on 11 May, 2013 - 7:51 am -
Hi,
the first question is (according to this last mail): what is the protocol used by RS422?
...
By Curt Wuollet on 9 May, 2013 - 7:51 pm -
You might keep looking, that range is often used in machine tools and there are some low cost...
By Bob Peterson on 9 May, 2013 - 6:08 pm -
there are encoders that have an Ethernet output.
I don't know of any rs422 to 4-20mA converters....
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.
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By Steve Myres on 13 May, 2013 - 12:57 am -
My apologies -- that sample WAS for a 3150 (which at least at that time you had to configure as a...
By Jim on 12 May, 2013 - 7:09 pm -
Thanks for all the replies.
I already have the Prosoft card, so no need to pay for firmware...
By Dayvie on 10 May, 2013 - 8:55 pm -
SLC 5/03 5/04 and 5/05's all speak Modbus natively
There is no need to purchase a $ 1,500...
BLDC motor speed control, constant torque at low speeds.
Help with RPM controller
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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...
Closed Loop Control Axial Variable Piston Pump (Hydraulic)
KTK Thyristor drives FAC 1R
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By M. Lewis on 1 May, 2013 - 5:35 pm -
Hello. Did you come across an answer for the inst trip question on a KTK board on a Bridgeport...
G771 Moog servovalve and a G123-825 buffer amplifier for a gas turbine.
hello,
can anybody give me a method to work out the transfer function from a step response?
can anybody give me a method to work out the transfer function from a step response?
please share your views on the MV Drives business in India,
I am doing a market research report for India...
I am doing a market research report for India...
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Hi NKS,
India is always a Growth Region market having huge potential for MV AC Drives.
...
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.)
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Dear Gopi,
Please contact me at balla.venugopal@gmail.com
Thanks,
Venugopal Balla
Mumbai, India...
Can any one help for coding encoder counts wrapping?
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By Robert Scott on 12 April, 2013 - 11:11 am -
How you handle wrap-around of encoder counts depends on what you are doing with it. If you are...
Info for Mavilor MO4500
I'm looking for a standard gray-code table, if one exists.
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By Nebojsa Mrmak on 10 April, 2013 - 1:14 pm -
> Might as well use a 256-byte lookup table for an 8-bit code. I'm not sure how far back the...
Up to how much low rpm can a BLDC motor be designed?
from the merry-go-round department...
Choosing an encoder and a PLC for a high-precision rotary tableI need to choose an encoder and a PLC to make a rotary table that could be positioned with precision of about 60 arcseconds.
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Control Technology Corporation (CTC) has a controller with built-in motion control to handle the...
By Steve Myres on 2 April, 2013 - 11:08 pm -
I had forgotten about those large, cylindrical (typically hollow) direct drive motors. I used a...
By Ken E on 2 April, 2013 - 12:50 pm -
In general unless there are requirements dictating gearing I would go direct drive (I was thinking...
By Bob Peterson on 2 April, 2013 - 12:26 pm -
Something occurred to me.
21600 counts per turn is only 60 counts per degree.
60 arc seconds...
By Steve Myres on 2 April, 2013 - 12:00 pm -
A few thoughts to get you started:
You probably want your final position-loop encoder on the...
By Bob Peterson on 2 April, 2013 - 9:33 am -
It is likely you can make it work with a PLC. There might be simpler ways to handle it with motion...
By William Sturm on 2 April, 2013 - 9:06 am -
The proper selection of a motor and gearing would be the first item, the proper electromechanical...
By Ken E on 2 April, 2013 - 8:49 am -
I have done turntable applications with Renishaw ring encoders. Look at the Signum and Resolute...
Control Techniques Multi Axis Application
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
Abex 425 servo valve failure experaince
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the big problem is there is actually lack of evidence there is a problem. the slow opening was...
By daveam on 2 April, 2013 - 10:56 am -
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...
By daveam on 1 April, 2013 - 8:27 am -
We have 27 Abex 425 on site on 35 year old turbines. The cause of your problem is likely a plugged...
Who can help me with finding training documents about the working principle of servo motors in combination with a absolute positioning encoder??
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By Mark Underwood on 24 March, 2013 - 5:21 pm -
FYI, they may have changed to orocos.org if not already there.
>There is also open source...
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Westheimer's Discovery:
A couple of months in the laboratory can frequently save a
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