Solder Jumper or solder bridge in Cadence PCB

 Sometimes when you are creating PCB, you need to provide modularity or reconfiguration easily, e.g. creating connection between two or more points. 

A solder bridge or solder jumpers is commonly used for this purpose and minimize the use of jumper resistors keeping simple the design, and could be short circuit (tin copper between both pads) or open circuit as below

Today I will show you how to do that in Cadense Allegro, I did it in Altium but in Cadense use a different method and is more complicated to be honest.

1. Firstly create a component symbol in capture for this particular “component”, i will use the short circuit as example.

2. For each pin include the property NET_SHORT when wiring each instance in the circuit fill out for each pin the net names to be short circuit using this symbol
3. In properties for each pin include the name of the net you want to short circuit in this case, bet1 for pin 1 and net2 for pin2, as example below pin 1, do same for pin 2.
4. Later go to create netlist>>setup>> edit, verify [pinprops] section include NET_SHORT_YES and I generate the netlist.

5. Create a pad in allegro and a symbol by using the passive template with dimensions suitable for your PCB project, include a shape etch top and connect both pads as below

5. use your new symbol and foot print as you want :).

I hope this info help you, believe in Cadense is not easy to find this info easily and I decided to share this with my students.

This same methodology can be used in order to create net tie in Cadense.

have a nice day.

Curso gratuito de introducción a la Ingeniería Electrónica

Si estas buscando y quieres hacer un curso gratuito de introducción a la ingeniería electrónica, te recomiendo que tomes este: 

Un saludo

#Electronica #AprenderElectronica #CursoGratis

Fuzzy Self Adaptative PID controllers design

Hi everybody, do you ewant to learn about Fuzzy Self Adaptative PID controllers design?

Dont forget give me five with your likes, visit my post:

best regards.

Gracias a los mas de 140.000 visitantes al blog

Ahora con un promedio de 1000 visitantes por mes actualmente, hace poco el blog superó los 280.000 visitantes desde su creación en 2009 cuando un día de junio empezó este hobby, recibiendo visitas de todas partes del mundo.

Mil gracias a todos los lectores, espero ser mas juicioso con sus correos, a continuación una imagen del ultimo año que muestra visitantes de todos los continentes.

Un abrazo fraternal.

Articles | 16 Question Survey | A Culture of Reliability

Articles | 16 Question Survey | A Culture of Reliability

What amazing article, just 16 questions that in deeply manner could change everything in your organization, and is interesting for us because in a little part is related to the Campbell's maintenance excellence matrix in order to improve our reliability and maintenance programs.

Little changes could result in big improvements, starting in the study of little defects... interesting, very interesting is the evidence of world class organizations.

Best regards.

Happy new year 2014

I just want to say... Happy new year 2014 for everybody.

Best regards.

Carlos Javier Moreno Gomez

¿Do you want to become an IEEE autor?

I found this funny picture at the web...sometimes true, so I prefer Science direct or springer link for the same purpose...enjoy!!!

Finally I get my CLAD National Instruments certification

During 2008 I remember when I was searching information about the Certified Labview associate developer program in my country... in that time there was some problems with that certification due National instruments hadn't representative office for that activity.

After of callings and letters, finally I get all the information, was necessary to go to Brazil... the only country in south America with the enable program in that moment... off course I didnt the exam in 2008, but finally after of 5 years the program was implemmented in my country, I did the exam and... Finally I get my certification :).

I like very much the National instruments technology because is very easy to implement and test many complex system using their technology... so right now I'm happy because Im a certified Labview Associate developer, probably  in the next few months I will be doing the CLD certification.

What are you waiting? The CLAD exam is waiting for you :)

See yaa

Experts systems and artificial intelligence applied to interpretation and diagnosis in complex mechatronics systems

Hi everybody, as you know I am Electronics engineer with a strong background in control systems, instrumentation and industrial automation and also I am finishing my masters degree in mechanical engineering, you know I love the mechatronics engineering and their role in the actual technical world, 
today I want to show you some of the results that I found in my masters thesis project called, "Design, implementation and evaluation of a expert systems applied for failure analysis in mechanical elements" (Axis, gears, bearings and boilers), in that thesis project I´m comparing three different inference engines as a artificial intelligence strategy for diagnosis and interpretation:

The finish document is here
And here there is a paper (you can download for free the pdf for the next 50 days) about this work published in the engineering failure analysis journal Science direct.

1. Clasic inference engine: based in modus tollens and modus ponens rules.
2. Fuzzy inference engine: Based on a previous comparation between sugeno and mamdani inference engines.
3. Bayesian inference engine, based on bayesian networks.

The system that I developed for axis has got 4 modules:Fracture, corrosion, wear and plastic modules.

Acordding to the different test that I did, I am very surprised because the bayesian inference engine have been the better behavior compares with the clasic and fuzzy inference engine, is amazing how the system solves complex cases of interpretation of evidence in many failure analysis process, Im  using a lot of failure analysis cases from the National University of Colombia (AFIS group have been resolved cases for many industries like Oil & gas, automotive and complex heavy industries).

At the end of my thesis ,probably 2 months, :)I will post the final results, this research project also could be implemented in other engineering fileds (instrumentation, automation and control systems) with amazing results.

I think that in the near future the applied cibernetics as artificial intelligence will be the win ticket for many companies thart spend a lot of money and time designing experts systems for their engineering optimization, honestly I think that artificial intelligence is the future for those industries.

Do you want to see a print screen of my system?

1. An example of bayesian network just for fracture module in axis:

2. Take a look around of the wear module, few questions are necesary to identify the failure mode, based in the knowledge base:  

3. After of the analysis according to the evidence for example for adhesive failure wear mode the system shows the following fault three analysis FTA.(for more information of FTA analsysis read the certified realiability engineer handbook)

The GUI was developed using Matlab/Simulink GUIDE (Bayesian and fuzzy) and C#+Amzi! Prolog (clasic inference). The work has been hard.

The most interesting result in this research masters project is the integration of a lot of my passions in one project as Electronics engineering, mechanical engineering, software develop and control systems, maintenance and reliability knowledge...

Some Oil & Gas companies are interested to implement this system in those industries for interpretation and diagnosis in their specific process (alarm management, Safety Instrumentation systems, control systems), I will be waiting for new challenges :)

15.000 visitors...unbelievable!!!

I can't belive it, i'm glad and I appreciate it... more of 15.000 visitors since the blog was opened, when I was writing the first messages, I never thought that one day the number of readers will be greater than probably 1000 or 2000 visitors... is amazing how the web open the world at your desk.

Best regards.

Merry Christmas

Merry christmas for all of my readers and thanks a lot for your time, I wish that the next year will be a success year for all of you.

Best regards.

Fuzzy adaptative PID controller test

I want to show you this paper that I made, using the original paper “Temperature Control System Based on Fuzzy Self-Adaptive PID Controller” by Xin H. et al ,presented in the Third International Conference on Genetic and Evolutionary Computing (2009).

During the test and review process I found an error because the authors in the original paper dont used the error input in the adaptative fuzzy PID parameters so... how they can show the result without this error input ? I wrote to the  authors telling them this error but I have not received any answer. 

Enjoy the document is interesting, the document is in spanish...

Mechatronics and the Role of Engineers - ASME

Mechatronics and the Role of Engineers - ASME

An interesting review about the most wonderful and great ocupation for me around the world, the mechatronics engineering.

The mechatronics engineering acording to my personal point of view, is just the exotic juice of differents fields of knowledge, I am glad to be part of that.   Best regards   Carlos Javier Moreno Gomez

Failure is not an option

During my last training and research in failure analysis and reliability engineering program, I found a material from Case Western Reserve University (Mechanical and aerospace department),in this case is a failure analysis podcast... the podcast has got the following description:

"Methods and procedures for determining the basic causes of failures in structures and components. Recognition of fractures and excessive deformations in terms of their nature and origin. Development and full characterization of fractures. Legal ethical, and professional aspects of failures from service."

I think that is an interesting material, due you could to learn any where with this podcast, so I want to give you the link for this interesting podcast.

The picture is just for fun, when I was in Space Center Houston I read a shirt with the message, always I remember it...

Enjoy the podcast.


A little project for failure analysis in Mechanical Elements using Catia

Hi, right now I'm working with a wonderful software called Catia, is a powerful tool for mechanic and metchatronics design developed by Dassault Systémes in France.

I made this little example using Catia, the next step is to make a Finite Element Analisys (FEA) using Catia.

I wonder... is possible to simulate a craking propagation using FEA for Failure Analysis in a boiler or some mechanical element using Catia? I'll to work on that goal...

For more information about Catia visit

See you...

Articles | 10 Things You Can Do Right Now To Improve Reliability | A Culture of Reliability

Articles | 10 Things You Can Do Right Now To Improve Reliability | A Culture of Reliability

The certified reliability engineer handbook

Today I will recommend you the following book The Certified Reliability Engineer Handbook.

Reliability engineers are professionals who understand the principles of performance evaluation and prediction to improve product/systems safety, reliability, and maintainability. This handbook’s chapters and sections match the Body of Knowledge (BOK) specified for ASQ’s Reliability Engineer certification, which includes design review and control; prediction, estimation, and apportionment methodology; failure mode effects and analysis; the planning, operation, and analysis of reliability testing and field failures, including mathematical modeling; understanding human factors in reliability; and the ability to develop and administer reliability information systems for failure analysis, design and performance improvement, and reliability program management over the entire product life cycle.

Right now I'm reading this book and I think is a good choise whom loves the maintenance and reliability engineering.

Labview - Stepping Motors and Labview

I made a little application in Labview for stepping motors, I used the local variables for the shift registers.

The application was made in spanish and using labview 8.6.
link: Go to application

Enjoy, See you...

VFD Micromaster 430 Siemens

Hi this is a litlle material about VFD (Siemens micromaster 430 series). Its very interesting because in the real world the parameter procces is the same of the simulator I wordked with the micromaster 440 in some industrial applications.

In this site you can be able to configure and explore the principal functions of the VFD.

GO : AC Drives Siemens

Corrective Maintenance AC Drives (Variable-Frequency Drive - VFD)

In this little tutorial, I show you... How to make a diagnosis of the IGBT's for a Variable Frecuency Drive?

This is a typical electrical configuration for a VFD...
Figure 1. A typical electrical conections in VFD

The Input power is a three-phase input (208V,440V/60Hz), the rectifier circuit converts the input in a DC input (this rectifier is a 6 pulsations rectifier), the fixed DC voltage is a Capacitor whose mission is to establish the DC reference, and now the Inverter Circuit... remember that the IGBT is a semiconductor device with characteristics of mosfest (the controls gate) and BJT (the current output), often the IGBT have a Diode for protection in the current discharges.

How can you probe if the IGBT is fine or not? easy... If the diode of each IGBT is fine the IGBT is fine, if the diode fail, probably the IGBT is damaged.

Figure 2. Connection terminals VFD

1. Attention -Turn OFF disconnect the VFD system from Three phase input.
2. Using the figure 1, and figure 2... measure with a multimeter "diode mode" at terminals DC+ (red terminal) and U, V and W (black terminal). See the figure 3.
Figure 3. First Measurement
if the Diode is fine each measured is OL... the diode is polarized negative way.

3. Using the figure 1, and figure 2... measure with a multimeter "diode mode" at terminals DC+ (black terminal) and U,V and W (red terminal). See the figure 4.
Figure 4. Second Measurement
if the Diode is fine each measured is 04V-0.6V.

4. Using the figure 1, and figure 2... measure with a multimeter "diode mode" at terminals DC- (red terminal) and U, V, and W (black terminal). See the figure 5.
Figure 5. Third Measurement
if the Diode is fine each measured is 04V-0.6V.

5. Using the figure 1, and figure 2... measure with a multimeter "diode mode" at terminals DC- (black terminal) and U, V, and W (red terminal). See the figure 6.

Figure 6. Fourth Measurement
if the Diode is fine each measured is OL.
End of this tutorial.

A little programming exercise using flex 3 (Chart+Array+ActionScript 3.0)

A little programming exercise using FLEX 3 (charts+arrays+ActionScript 3.0). I love the software develop too (And PLC, Scadas, DB, sensors, mechatronics,Electronics, maintenance, reliability... jeje) "Someday"I will make a weibull distribution software tool.

Take a look around... Mechatronics

I just love my profession!!

Cause and Effect Diagram Training Video

Hi everybody, yesterday I find an interesting video about Cause and Effect Diagram, its a basic material, but is a good material, check it out.

Right now I will to write some information of this blog in english, spanish or french , its a sugestion of some visitors and friends, enjoy the blog.

Interaccion entre ingenieria de confiabilidad e ingenieria de calidad

Leyendo un material de la AMERICAN SOCIETY FOR QUALITY especificamente dirigido a ingenieros que se quiere certificar como CERTIFIED RELIABILITY ENGINEER (CRE), encontre algunos items interesantisimos con respecto a la interaccion entre la calidad y la confiabilidad que quiero compartir con ustedes.

Lo que escribire a continuacion es un pequeño resumen de los puntos 2
que me parecieron interesantes.

1. Otra forma de ver diferencias e interacciones entre calidad y confiabilidad, es la forma como los datos son recolectados.
En el caso de la manufactura los datos para ingenieria de calidad son recolectados generalmente en el proceso de manufactura. Entradas como voltajes, temperaturas, parametros de material y salidas como dimensiones, PH, peso y niveles de contaminacion son medidos.

Mientras que la ingenieria de confiabilidad adquiere datos generalmente despues de que el producto fue producido, por ejemplo, el el numero de toggles (cambio de off y on en un interruptor) antes de que este falle.

2. Los ingenieros de calidad y confiabilidad proporcionan diferentes entradas dentro del proceso de diseño de un producto. Los ingenieros de calidad sugieren cambios que permitiran que el producto pueda ser producido entre la tolerancia requerida y a un costo razonable, mientras que los ingenieros de confiabilidad hacen recomendaciones que permitiran que ese item o funcion, opere correctamente por un largo periodo de tiempo.

Es algo basico, un producto que cumple con estandares de calidad, generalmente es confiable , la ingenieria de mantenimiento y confiabilidad son geniales.. las garantias, las pruebas... todo!!!

La certificacion como ingeniero de confiabilidad es muy interesante, aunque en mi caso estoy en la busqueda y preparacion de la certificacion como CMRP (certified maintenance and reliability professional) de la SMRP que desde mi corta experiencia es la que cumple con las mayores expectativas que tengo.

Espero que esta entrada les sirva para algo, nos vemos.