http://www.theiet.org/forums/forum/index.cfm?forumid=1 FuseTalk Standard Edition http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=52532 2013-05-18T06:49:14 00 onapthanh 1 [onaprsc.com.vn]-Energy includes two types: Renewable energy and non-renewable energy. At present, our country as well as many other countries are exploiting 4 commercial energy is traditional hydropower, coal, oil - and gas atoms. In addition to hydropower as renewable energy, the remaining 3 types of non-renewable forms of energy, that is exploited to a certain level will end.
Use energy needs associated with environmental sustainability, restrictions affecting climate change. And the new trend of using energy resources avail endless, environmentally friendly and renewable energies such as solar, wind, tidal, wave, hydro, nature waste, ... At present, most people are aware of solar energy is very large, easily obtained, and is well suited to the climate in Vietnam. Vietnam is a country with an average of 1 day sun is high, about 5 hours of sunshine / day. This is a very favorable conditions for efficient use of this energy source
A public lighting system needs to meet the conditions for stability, reliability, safety and urban landscape while saving electricity is a requirement of urban areas and cities. To accomplish this goal need to adopt measures illumination-application of new technologies for energy saving street lighting and traffic in Vietnam today[onaprsc.com.vn]]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=52331 2013-05-01T21:25:06 00 elkassmielec 2 In the firm, the process is controlled by a Yokogawa's DCS (Centum CS 3000) which offer an OPC (EXAOPC) to allow the communication with higher systems.
My question is : because of technical and financial issues I can't implement each one of the controllers and calculate their profitabilities. So how can I make a comparison between the APC vendors without testing them ?]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=52131 2013-04-19T10:22:02 00 jgdavies 2
Easy: Automating the unloading a machine i.e. little step
...
Couple of other steps
...
Hard: Automating the loading of a machine. i.e. big step

I thought it the title was ended in 'handbook', but maybe I'm mistaken otherwise I'd have expected to be able to find it.
Thanks]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=52028 2013-04-14T13:58:24 00 DBMiller 2
Can someone please try and explain the terms to me?]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=51976 2013-04-11T09:27:54 00 giason 1

If a system has a proof test period of 1 year (T1 = 8760 hrs) and a MRT of 3 weeks (504 hrs) then the MTTR = 4884 hours

Based on

MTTR = (MTR/2)+MRT

Really I wish to validate the above formula is correct as I have it ustilised but cannot find the original source again in either 61508 or 61511, probably just being blind but work a check.

IEC 61508 Pt 4

3.6.21
mean time to restoration
MTTR
expected time to achieve restoration
NOTE MTTR encompasses:
. the time to detect the failure (a); and,
. the time spent before starting the repair (b); and,
. the effective time to repair (c); and,
. the time before the component is put back into operation (d)
The start time for (b) is the end of (a); the start time for (c) is the end of (b); the start time for (d) is the end of (c).

3.6.22
mean repair time
MRT
expected overall repair time
NOTE MRT encompasses the times (b), (c) and (d) of the times for MTTR (see 3.6.21).

Many Thanks in advance

Geof I]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=51912 2013-04-05T14:58:15 00 bodmin 2
I have calculated the size of orifice plate and am now working out the size of the control valve.

Do I need to include the dp across the orifice plate and lump that in as a fixed resistance with the pipe work when working out the available head in in the system? I know that the dp will be variable but do I use the dp under normal working conditions I.e. when flow is at its set point.

Any help would be appreciated.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=51742 2013-03-27T10:59:07 00 Asasi 3
I was looking around to find any Free or even Commercial PC software so can help me with automation projects. Do you know any software for Windows 7 or Mac OS? Mobile applications is good as well.

Waiting for your suggestions...

Best Regards
Asasi]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=51705 2013-03-25T14:05:05 00 Gelo86 7 I have a question regarding periodic proof test required by the Standard IEC 61511.
In particular about a proof test of a valve.

It is possible monitor the movement of a process valve and consider the result of this movement as a result of the proof-test of the valve?]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=51532 2013-03-19T02:44:30 00 Heartnet89 2
Why does the industry prefer to use PI rather than PID or PD? Is it because of the reasons below? Please let me know if my theory / finding is wrong.

- Easier to tune
- Easier to implement
- Save time
- D is difficult to find
- D slow down performance
- D creates slight oscillations.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=51368 2013-03-12T01:54:52 00 Heartnet89 2
What is the reason behind the 4-20mA current as a standard signal for transferring data? Well for starters, we choose current over voltage because there is less signal / data loss when the signal is being transferred over.

How about 4-20mA?

Well the purpose of having 4mA as a minimum is to be able to make sure that process actuators are "on" so that SCADA is able to detect any possible fault. Is that right?

how about 20mA?]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=51367 2013-03-12T00:40:19 00 peterspark 8 thanks for any help]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=51351 2013-03-11T01:40:57 00 Heartnet89 5
Can someone please clarify whats the difference between RTU (remote terminal unit) and PLC (programmable logic controller)?

As well as difference between HMI & SCADA? I am so confused.

Isn't RTU basically PLC? Thanks.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=51217 2013-03-05T10:10:50 00 peterwilliams 4 http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=51105 2013-02-26T13:19:10 00 John1991 3
I'm a fourth year Design Engineering student within the University of Strathclyde, Glasgow. My main project this year is to design a system to spray coat forming and forging samples for an organisation called the Advanced Forming Research Centre, who focus on advancing technologies in forging and forming for the aerospace industry.

I am posting looking for some advice. I have some mechatronic control knowledge from the past years at University, and for this system I am designing I have got to the stage where I will be building a prototype demonstrator. The system will be required to consistently spray coat sample pieces prior to forging and forming processes. My aim is to build a demonstrator for a semi-automated system and I am unsure as to what mechatronic control units and components I will need. I will not specifically need to build a fully working spray coating system, but rather a proof of concept demonstrator, so the actual act of spraying could be substituted with something as simple as a solenoid activating. I do want to demonstrate however the automation in the system, I have been looking into microprocessor units and my thoughts are to buy an Arduino Uno as the brain of the system. If anyone on here could advise me on what over control components (transducers, position sensors, motors, in/out controls) I might need for the system it would be very greatly appreciated.

Thank you in advance for any help,

John]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=50963 2013-02-19T15:23:04 00 Heartnet89 2
I am working on a University project at the moment. The project scope is to implement a simple PID Program for a process tank and implement a SCADA/ HMI using Allen Bradley Micro830 PLC.

I know AB has its own HMI/ SCADA hardware. However, the aim of the project is to use software only.

So my questions are,

1) is it possible to implement a SCADA/ HMI on the computer with a generic RS232 cable + available SCADA/ HMI software or I need a RS232 cable that specifically made for Micro830?

2) how do I make my Micro830 communicate with the computer via RS232 cable? Are they able to communicate just by having the same modbus code? I am not sure how to do it.

3) how do I go about doing it? What are the available softwares? I thinking of using GE's CIMPLICTY but haven't got around to try it yet.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=50898 2013-02-15T17:05:19 00 sashdo 2
Any thoughts?]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=50742 2013-02-06T14:22:48 00 DavieOrr 6
I am currently investigating the feasibility of using a robot arm for packing products. The products are cylndical in shape and about 150mm long. They are packed into a box which needs to be replaced by an operator when full (no conveyor system here I'm afraid). As such I need recomendations on guarding as the operator need access.

Any ideas, documentation, regulations, thoughts, video, etc ? All help is gratefully appreciated.

Thanks
Davie]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=50626 2013-01-31T13:45:56 00 PaulMalloy 3
Would appreciate if anyone has more detail on this. If it is specified anywhere then will clear up any arguments that may ensue.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=50510 2013-01-25T18:49:34 00 mahwishjawa 2
i have to write a survey paper on Control System Design for Flexible Structures and this topic is completely new to me.. i have tried searching but it has been unfruitful so far.. can someone please tell me what actually these flexible structures are and how to start with this topic..]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=50141 2013-01-08T14:09:37 00 sashdo 2
Does anyone have a copy I could borrow or know where I can get a copy?

Thanks

Steve A]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=49630 2012-12-07T12:00:32 00 01967834 6
My problem is that in my experience with IEC 61508, the use of a risk graph in ISO 13849 is not the normal practice for High demand mode. Secondly in all the information i have seen there has been no mention as to the calibration procedure required for the risk graph.

Has anyone got any thoughts on this matter.

Regards

Paul Karslake
]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=49528 2012-12-01T22:15:53 00 richardamo2007 1
Young professionals are willing to engage their talents in this field of study but the setback to this is funding, especially to talents from developing countries.

Are there individual professionals and organizations willing to help in this worthy course to young professionals???

In situations like this, I believe it would be very great to have professionals or organizations to support young talents to keep the scope of Automation and Control Engineering.

Please, who is willing to support to keep this dream alive??????

What is your view and comments?????]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=49395 2012-11-25T06:21:25 00 fitzpatrick1976 2
Can anyone let me know if they have had this problem before please.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=49123 2012-11-08T11:27:04 00 HBarnum 6
How do you calculate PFD/PFH for safety instrumented functions?
The simplified calculations in IEC61508 are very basic and assume for voted sub systems (e.g. 1oo2, 2oo3 etc.) that the failure rates of the components are the same.

Is there an easy method to calculate PFD/PFH without using Markov, Monte Carlo, etc?

Thanks

H]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=48828 2012-10-17T16:53:18 00 ajitka75 1
In one of our site in India,Our ESD Input/Output card are failing after lighting.In the same network there is one more ESD Station & One DCS Controller, but this is not failing only one ESD controllers Input/Output cards are failing.
As Same UPS is supplying power to all the controllers.we had checked all the output and Input cards and are working normal the power supply unit is also working.

Can anyone suggest what might be the problem??

Regards
Ajit Kumar
YOKOGAWA
Bangalore .]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=48151 2012-08-29T09:29:57 00 timslater 2 Need to enter values into inverter.

Regards Tim]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=48059 2012-08-20T09:14:04 00 dougflorence 2
The relevant C type standard requires EN13849 Pld for the wireless comms and PLc for the hardwired parts. The standard defines PLd for the comms in terms of the likely error rate in the comms system.

To save me a lot of research, does anyone know if ZigBee is a suitable medium for this application? The situation is analogous to the cable less pendant controllers used on many cranes.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=47907 2012-08-08T19:31:55 00 rbridge1988 7
got a site pumping treated water with a duty/standby setup and a backup generator for mains failures. There was 2 siemens VSD micromaster 440's one for each pump controlling on a PID feedback. When the mains was failing on high demand though and the duty drive ran above 46 Hz it would trip the generator out.

We have remedied the fault by changing them to ABB ACS550's and not a problem. I know the fault it down to power filtering but what exactly causes it? The generator was operating an RCD type protection but i'm still a bit unsure why it took 2 minutes to trip out and high demand on the VSD.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=47887 2012-08-08T09:03:55 00 gadge 7
I'm installing 3-wire gas sensor's in a haz area that will go direct into our siemens S7 PLC (iSP haz area I/O).

Apparently the loop power is not enough so i have to supply the sensor with external power and use a 4-wire AI card abd set the sensor as source and not sink powered.

Has anyone got a loop of how this should be wired?

Thanks]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=47883 2012-08-07T19:15:30 00 Heartnet89 3 I am currently working on a thesis on programming a basic process tank, I need to control the servo valve and solenoid valve so that the water can reach the desired setpoint. However, I encounter some problems along the way. The solenoid valve requires a 24volt voltage to be switched on and the servo valve requires a 20mA current to be open. I wired the solenoid valve to one of the embedded output on the PLC and wired the servo valve on the analog output on the PLC.

My questions are
1) Would the embedded output of the PLC be strong enough to turn on the solenoid valve?
2) Where should I wire the solenoid valve onto? Com or O1, O2, O3 ?
3) How do you program the plc to output an analog value to the servo valve from the analog output?
4) Can someone please tell me what is the characteristic of the embedded i/o? EG, if I assign a Boolean "1" on the output what would happen to the com / output?

Thanks in advance =)]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=47609 2012-07-23T05:58:52 00 Heartnet89 9
I am a doing my final year thesis on programming AB Micro830 for basic water rig process. My lecturer would like me to create a HMI / SCADA for it on a computer so that future students can view the flow rate of the water / water level / change the setpoints. I am wondering if anyone can give me a guideline on what software should I use to implement it? Thanks.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=47472 2012-07-15T00:33:05 00 guitarman001 27
I'm a UK resident with a Masters degree in electronics & electrical engineering. I've been doing analogue IC design for the past 5 years or so. Back when I graduated I wasn't 100% certain whether to do this or go into a more power-related field (electrical, basically!!). I've been doing well in my job but honestly, the pay just isn't there. I have considered moving to America (better money but terrible work hours and holiday entitlement) or Germany (looks a good option).

A friend of mine recently graduated from civil engineering and got a job in the oil & gas sector, and already his salary dwarfs mine (£38k basic, 10% bonus, and he gets paid overtime - unheard of where I work!!). This has prompted me to look back at the jobs I was going to apply for when I graduated. I am looking at BP, Technip, companies like these, in order to do an electrical/C&I job. The money (I think, but not sure) seems to be better and I think the job will be more around on my feet rather than be seated in front of a computer screen every single day.

So it's a toss up between sticking with the industry I know, or moving to a new one. Going to Germany or going to Aberdeen. I've always had a little fear for where the electronics industry is going - certainly wages in the U.S. seem to have fallen in recent times as global competition heats up, but with C&I engineering, it's not like that sort of thing can be outsourced easily.

Can anybody give me their take on this? It would be extremely difficult to go back into IC design if I do make a move, so I need to be sure. I'm sure you guys have a lot of worldly experience. So far I've been reading up on the C&I job on sites like BP, for example... and also looking at some tutorials on youtube, for example (that sounds pathetic, but I've literally only started looking). Right now I'm working 11 hour days leading projects and not getting paid for the job I'm doing (in my opinion). Even if paid my worth it would (I think!) be less than what I could get doing C&I. Obviously money isn't everything, and I think that C&I engineering would quite suit me. However I must admit that day to day, I'm not 100% certain what is done! I only know the vague activities.

IC Design: £30k (near where I'm at) - £55k or so. Design & layout integrated circuits, test them once fabricated, define new products. I don't know about C&I but IC design is tiring - got to be a true expert, keep up to date with processes and circuit tricks, know about frequency analysis, sampled data systems, switching converters, sigma-deltas..

C&I engineer (in oil and gas) - £38k-70k+ (???). Real-time programming involving the use of SCADA and PLC in order to electrically control mechanical processes. Physically on your feet a lot, get to know different processes....?? Tell me more!

MANY thanks for your hep on this.. my early-life career-crisis!]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=47337 2012-07-04T14:04:41 00 wilsonsi 2
I am looking for some help/guidance.
I am currently designing a module (fancy ISO container with electrical equipment inside) that is fed by two separate 3 phase supplies (Essential & non-essential). The supplies are terminated into Schneider 100A NSX100 MCCBs. My client has asked for an emergency stop system (2 buttons required) to shut down both supplies and supply a volt free relay output to their UPS.
My initial thought was to install an 'Undervoltage Release' on the MCCB with an emergency stop circuit on N/C contacts. This was refused by the client as the module is to be located in a remote area with 'posible dodgy' supply's.
My next thought was to use a shunt release powered from upstream of the MCCB however this would then require the emergency stop circuit to be N/O which is not good practice. I then considered using a change-over contact/contactor to allow the emergency stop circuit to be N/C, this was also rejected by the client as they dont want to rely on a contactor.
The client has requested we use a safety relay to power the shunt trip coil on de-energisation of the emergency stop circuit. I have spoken to Schneider Technical who have informed me these relays are used for industrial machines and as such a contactor would have to be used as well as. Schneider have advised I use a system as described in their FAQ website section (FA141719) which uses a self-latching circuit and a contactor down stream of the MCCB to isolate the supply. This looks fine for a single incoming supply but I cant work out how to connect it with 2 separate supply's from 2 common emergency stops. I also wondered if I could use the under voltage release from the NSX100 for this rather then a separate contactor?

Any help or ideas gratefully received as I feel I have been going round in circles with this!

Thanks,

Simon]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=47244 2012-06-28T08:28:03 00 hwbradshaw 2
Does anyone have any documents they could share as a starting point on an approach to tagging. ie labelling alarms, inputs, outputs and referencing them to set plc's

Regards,

Henry]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=47235 2012-06-27T16:37:12 00 csjones 4
I'm an electrical engineering apprentice working for a Biomass Gasification power plant company.

My question is:

Currently our work involves producing a gas which is explosive when in contact with air, therefore we use ATEX rated sensors and barriers etc. and take necessary precautions to prevent any sparks which may cause an explosion. We are having a design review and came across ASI-Bus and unfortunately, we don't not have any information whether our temperature/pressure/flow transmitters (which are in direct contact with the gas) can somehow be connected to the ASI Bus. Is there a way to do it ?

Any help would be grateful.

Thanks.

Chris]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=47018 2012-06-14T12:41:46 00 Jonni1987 4
Thanks,]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=46941 2012-06-08T20:56:42 00 paultrimble 7
Just after some guidence toward a suitable course covering EN13849 and if anyone has any experiance of any good training centres around the UK that hold such courses. I would be looking more into the validation of a SRCS than the programming of one as I dont actually carry out any programming but any course with relevence to 13849 would be great.

Cheers
Paul]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=46696 2012-05-22T21:38:34 00 hwbradshaw 1 Good bad or indifferent?

The Rockwell spiel seems appealing but how easy is it to use and how many companied support it?]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=46656 2012-05-20T16:31:27 00 jpichaimuthu 1
I have manual for the machines and electrical drawing, Do anyone know where i can find a maual for trouble shooting like errors that shows up on the screen?

Jag]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=46598 2012-05-16T10:54:15 00 janaka077 1 i am going to implement "master-follower' method. i set one of 30MVA TF) as the "master". what will happen if it trip off. Will there be "parallel failure' come ?.
How can i see the circulating reactive current?
I appriciate ur help.
janaka from sri lanka]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=46597 2012-05-16T10:54:13 00 janaka077 1 i am going to implement "master-follower' method. i set one of 30MVA TF) as the "master". what will happen if it trip off. Will there be "parallel failure' come ?.
How can i see the circulating reactive current?
I appriciate ur help.
janaka from sri lanka]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=46596 2012-05-16T10:52:19 00 janaka077 1 i am going to implement "master-follower' method. i set one of 30MVA TF) as the "master". what will happen if it trip off. Will there be "parallel failure' come ?.
How can i see the circulating reactive current?
I appriciate ur help.
janaka from sri lanka]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=46528 2012-05-10T11:27:31 00 JohnLindop 3 Which make and models were used.
Were they IS or inside a Ex enclosure.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=46491 2012-05-08T10:36:02 00 BenjaminOB 1 My basic specification is the hand needs to be able to at least grip and hold an iron and be capable of many other domestic tasks the second one i am looking at may be opening a jar or perhaps being able to grip, hold and operate a kettle.

Please note this is just the hand to be attached to a larger domestic robot so its main functions are to grip and be capable of holding onto objects while they are being moved about. With regards to opening jars I have only really come up with one solution to have the whole hand on a rotary wrist.

The hardware to be used is ARM i don't know what processor or board yet as i am hopping to get in contact with arm themselves for advice on available mini boards i could build into the hand itself. Failing that we do have access to and ARM educational board with a screen attached or possibly an educational altera board.

Please any help you can offer would be greatly appreciated, my main ask is about servers and motors tho as i will need to get them ordered soon. However any other advice would be greatly appreciated and is more than welcome.

regards
Benjamin]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=46277 2012-04-24T16:54:37 00 djrichiet 9 http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=46017 2012-04-05T11:39:32 00 hwbradshaw 1
Then they throw in a Saia PLC. Has anyone any experience with them good\bad? Examples of code or how the interface software works\performs?

Any feed back welcome.]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=45934 2012-03-30T14:19:23 00 dougflorence 1 measured shall be in the expected range according to the length, the cross sectional area
and the material of the related protective bonding conductor(s)....."

Easy enough to a calculate the theoretical conductor resistance, although on an old machine it can be a bit difficult to decide what the conductor size is.

The standard does not mention connection impedance but that can be a significant part of the overall protective bonding circuit impedance and can often be more of a problem than undersized conductors.

Is there any guidance about what could be considered a reasonable range for connection resistance?]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=45933 2012-03-30T14:15:23 00 dougflorence 4
No problem with conventional motors, but what about servo motors and motors powered by inverters?

Any risk of damage to the inverter? I guess not because all the tester does is create a 2 cycle earth fault and measure the current during the fault. Most modern inverters can take that sort of thing in their stride.

Will it get meaningful results anyway?]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=45925 2012-03-29T20:44:55 00 jpichaimuthu 4
I have heard about soldering, crimps and plastic caps and using one single cable.

In places where I cant use one single wire I need to connect it with a type of connector, but is there any other option to replace these chocolate blocks which is better and good way of connecting two wires.

kind regards
Jag]]> http://www.theiet.org/forums/forum/messageview.cfm?catid=221&threadid=45924 2012-03-29T20:38:14 00 jpichaimuthu 3
My supervisor has given me a task. I the die casting machine process injection process the ram works in two phase. In the first phase the ram goes slowly pushing the hot metal into the die and in the second phase the ram moves fast pushing the hot metal at a high pressure of 138 bars. My supervisor want to measure the speed at which the ram moves and time it takes for the travel in first phase and second phase which is fraction of seconds.

Can anyone please suggest any device or equipment that can measure the speed of ram and time(less than 1 sec)

Kind regards
Jag]]>