| ??? 04/04/09 15:34 Read: times Msg Score: +1 +1 Good Answer/Helpful |
#164323 - learning - discouraged really? Responding to: ???'s previous message |
1) OP posted : 3 phase induction ac motor rpm controller
Haq Nawaz said:
hi i want some ideas how to control the 3 phase ac induction motor which may be 7Ampere. i want to use microcontroller for this purpose... Erik Replies: sure <-- this sure is an insulting remark Erik Malund said:
want to use microcontroller for this purpose...
and the professionals use a DSP <----- Why didnt you write; 'its quite dificult this way , mostly the designers use Digital Signal Processing or dedicated MCUS for this purpose' 2) Now Erik carries on with: Erik Malund said:
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this is one more of these foolish "I can make that cheaper" ideas. You can get an inverter for a couple of hundereds (dollars), just look at the one off price of 1600V IGBTs. Erik foolish yet another derogatory remark ! (Which if Per is seeing doesnt wants to point that , but find problems with me). OP didn’t ask for place to buy anything but some help on the topic . This is the help you provide and motivation you give. 3) Now Kai Replies you to be a bit reasonable here ; Kai Klaas said:
We tell every poster here: "Don't do it by yourself, buy it." And the forum will disappear...
Erik said:
this is one more of these foolish "I can make that cheaper" ideas. Who says, that Haq thinks "I can make that cheaper"? Where do you know from what he thinks?? But more, by calling him a fool you even have offended him. Well done, Erik. Kai Before you could even reply Andy is there for the BACKUP and ready to provide a spark in the oil here: 4) Andy Neil said:
Kai Klaas said:
Who says, that Haq thinks "I can make that cheaper"? Where do you know from what he thinks?? Maybe Erik is extrapolating from here: http://www.8052.com/forum/read/164116 ? Was there any need of justification by you Andy! 5) http://www.8052.com/forumchat/read/164164 Quickly without wasting your time you post again in a separate thread to check , how much patience people have? Andy Neil said:
Erik said:
this is one more of these foolish "I can make that cheaper" ideas. Kai Klaas said:
But more, by calling him a fool... Erik said the idea is foolish; that is not the same as saying that the OP is a fool... I think we all have daft ideas from time-to-time... 6) I asked you why are you assuming? here Ap Charles said:
Andy Neil said:
Kai Klaas said:
Who says, that Haq thinks "I can make that cheaper"? Where do you know from what he thinks?? Maybe Erik is extrapolating from here: http://www.8052.com/forum/read/164116 ? How do you know that? did OP ask for making a cheap control? . -Ap 7) I request Andy to leave the topic indirectly here; Ap Charles said:
Andy Neil said:
Ap Charles said:
BTW how many more possiblites you know ? Given the evidence, I would say that Erik's was not an unreasonable extrapolation... I know what you mean posibally its purely manure . I feel you want to outbreak our quarrel with Erik , it wont happen . Erik is as dear to us as he is to you . But if we find him getting impatient we feel hurt as to why a seasoned Man talk this way , maybe you can do that we wont even try to stop you dear Andy . -Ap 8) Erik Indirectly admits he is doing that delebrately here; YES, I deliberately post the truth , Erik Malund said:
That means you delebrately do it and poor Andy keept justifying for you unnecessarily
YES, I deliberately post the truth - why that is "sad" you need to explain. Do you want me to lie to wrap my posts in pink cotton. Erik But who wants you to lie , when you cannot even speak truth the correct way. 9) Now Andy reverts as his mission is over here:- Oh yes I do! Andy Neil said:
Andy Neil said:
Given the evidence, I would say that Erik's was not an unreasonable extrapolation... In other woulds, I would tend to agree with Erik's assessment! 10) I leave all that and continues with a helping link here : Ap Charles said:
Haq Nawaz said:
hi i want some ideas how to control the 3 phase ac induction motor which may be 7Ampere. i want to use microcontroller for this purpose... ww1.microchip.com/downloads/en/AppNotes/00843a.pdf -Ap 11) Kai provides some help here to drop the issue . Kai Klaas said:
12) Till now what constructive activity have you provided Erik , do consider by the time now Andy has fled the scene. 13)) I provide yet another link Another Low cost design here http://www.8052.com/forumchat/read/164229 And without even reading it completely you Mock me here Erik Malund said:
the one from the list that can handle 7A require 8 (EIGHT) devboards
or, did you not even look, but just got excited about the phrase "low cost" and refer to the 500W appnote Erik And you keeps continued without even reading what link was given for a couple of threads . Here you say; Erik Malund said:
why focus on the 500W link on the page?
the one Ap must have referred to "low cost ...." and finding the 500W 'limit' I opened another and saw that one requiring 8 devboards. Of course, if I had nothing better to do I woukd have looked at the partslist and priced it, but alas, fortunately, I have better to do. Erik I don’t have any problem if you have better to do . Then why are you here do your work . 13) I stop arguments with you and try to post here; http://www.8052.com/forumchat/read/164281 Ap Charles said:
Another Good application note here . It shows how to avoide DSP for such applications.
https://www.silab.../An191.pdf -Ap YOU reply and the very first paragraph is Erik Malund said: you Mock me second time .
Small motors, less than 300 W, Per did you see this or you wanna find faults with me. 14) Erik again continues even further with his Mockings shooting elephants with BB guns Erik Malund said:
It shows how to avoide DSP for such applications.
FOR Small motors, less than 300 W, You keep ignoing that LAYOUT for the currents we talk about here is 100 times more important than the schematic and the code. At 300W the currents are so, that by oversizzing some components you may be able to circumvent some of the effects of the reflections and other uglies, to do that at 7A you may need a 2000W IGBT Erik Erik why don’t you give any advise to OP , and why do you give that to me may I know that. 15) ONLY Kai finds this disgusting Attitude not Per here It becomes disgusting now... http://www.8052.com/forumchat/read/164292 14) You reply erratically Erik Malund said:
Then give some hints how to manage this instead of upsetting the apply cart
I do not do layout, that, however does not preclude that I have seen, heard and read about how critical layout is for inverters. Kai, just think back at the "mini inverters" (switching power supplies) you have made in the past. SO WHAT? LEAVE IT TO HAQ AND HIS TEAM HOW TO MANAGE THE PROBLEMS! BUT DON'T PISS ON PEOPLE WHO GIVE VALUABLE HINTS! STOP YOUR ONE-MAN SHOW! That I make the OP aware that layout is CRITICAL for an inverter is hardly "pissing on people" "don't do it by yourself, but buy it". Misquoted, what I have said is "It will be cheaper to buy it than to make a one-off" Erik If you do not do layouts , then what are you here for ? in this thread . When did you made OP aware “That I make the OP aware that layout is CRITICAL for an inverter is hardly "pissing on people" “ when ? . Instead you were busy finding faults with me didn’t you . Did OP asked you should I buy or Erik will teach me? 16) Again you remark Warning against the pitfalls does NOT imply an assumption. Erik Malund said:
Yes, for us in Europe or in the U.S.A., but not for someone in India or Pakistan.
why do you profess to know that inverters are more costly and parts are not? Of course, I know, that fabricating an inverter is really hard stuff. But why assuming that they cannot solve all these problems? hwre have I, by stressing that "fabricating an inverter is really hard stuff" in any way been "assuming that they cannot solve all these problems". There are, you know as well as me, some that always think "I can make it cheaper" and e.g. come out with a microvolt analog two sided board and post "why is it not steady?". Warning against the pitfalls does NOT imply an assumption. Erik Did OP asked for a cheap or cost effective solution till now ? show me where . Warnings what Warnings you were busy with Leg pulling ( this shows how sincere you are) Just because its YOU that didn’t agree so anyone is not allowed to post anything ? or you will start Legpulling. 17) And your present remark learning - discouraged Erik Malund said:
But how else someone gets to learn ,people come to forum to try to learn something and not for 'OP you have nothing to learn the thinge is difficult to design go and buy one'
learning - discouraged two words Ap keeps bringing up learning How much will someone learn if (s)he has not made 'blinky' run and just jump into designing a Mars lander?. In my opinion you should learn to crawl before you learn to walk and lean to walk before you learn to run. does "hi i want some ideas .... i want to use microcontroller for this purpose" sound like a 'runner' Discouraged If I am told that it is dangerous to jump out of airplanes with a parachute I get information. If that discourages me that is my choice. If nobody told me that it is dangerous to jump out of airplanes , I would not be very observant to the lessons given before my first jump. Thus, how is it "discouraging' to point out that something is difficult? Erik “learning - discouraged two words Ap keeps bringing up” , read right from above what ENCOURAGEMENT did you give OP ? . How do you guess this from a single line help and after you set a complete plan to ward OP away not leaving him from anywhere to provide a followup? “Thus, how is it "discouraging' to point out that something is difficult?” But where did you point that explicitly to OP you were busy leg pulling me . Show me where you Addressed him . This is not first time I see here , I have this time taken a bit more time to show your worth ! with this post .I have given you and Andy let go attitude this doesn’t means I am foolish and I don’t understand anything ? . -Ap |
