Engineers should confer politely with one another not try to get one up all the time. I asked some questions that are general to the smoothie project, and when I mention that I have bought an MKS board I am then treated like an idiot. I assure you I am not an idiot, I just happened to take an interest in the smoothie development and as I needed somewhere to start I saw a smoothie board advertsed and bought it. That may not have been a sensible move, but I had very little info t go on. Because I found some problems I asked people here, that was obviously a mistake!
I appreciate that many of you have spent a long time and much effort on the smoothie project and find that very satisfying as I am aware of the types of problems involved .
Ok so to be clear I personally have no issue with you buying an MKS (although @Arthur_Wolf certainly does as it directly affects him). My issue is that I do not really want to have to support MKS users, I think MKS should support their customers. As far as your question I see it was answered by someone (@Triffid_Hunter ) who has more knowledge on the issue than anyone as he designed much of the current smoothieboard H/W. He pointed out your issue was with bad PCB design and routing of the USB lines. As such there is nothing we can do in the firmware to fix your issue.
As for people jumping on the MKS issue, yes it is unfortunately a hot topic, and we take every opportunity to try to explain why buying an MKS hurts the Smoothie project as a whole. I apologize for getting overly heated in this argument and should have just left it be.
Oh and @Triffid_Hunter also wrote all the USB stack in Smoothieware, so is very knowledgeable about that. I think we were insulted by the phrase “a very doubtful serial to USB connection” insinuating that the fault lies with the designers of smoothieboard or the writers of smoothieware. Neither of which is the case in this instance.
Thank you and I appreciate your fair answer. I understand your feelings about the klone mks.i also appreciate the advice you and several of others have given .I will also appologise for the young man but as I am 80 years old I may have been in order to say that.you may call me old man!
Well I hope we answered your questions 
I have to say that maybe if the question had been phrased slightly differently you may have only got the fair answers and none of the nasty ones I may be reading something into the way the question was phrased that was not intended, but I suspect if the question had been simply “why does my MKS USB disconnect frequently”, without the implication that it was a Firmware failure, the answers would have been less harsh, just a thought
and again my apologies for getting heated, it was unjustified in this case.
Also some of the suggestions here may be worth trying…
http://smoothieware.org/troubleshooting#toc16
The MSD in windows can cause the whole USB to reset which would also disconnect the serial.
Thank you Wolfmanjm, I agree and say sorry that I worded my request open and so as to say all smoothies had this problem, I will try to be more thughful how I phrase queations in future. kind regards
Well, what I take away from this is that Smoothie is so great 80 year-olds use it.
Just a personal note: being 80 means a life of experience and always learning something new. If one retires and doesn’t use the brain then one dies very quickly: I try to keep up with as much as I can! Yes the Smoothie is great and deserves to go further, keep at it please.
@Brian_W.H_Phillips I guess what makes it note-worthy is that CNC control wasn’t around when you were born, so we find less people of your age in our community. The same way there aren’t many 80-year old web developpers I guess. There are a few, they are people who learned this stuff when they already had learned something else.
Just out of interest maybe, I started programming 6800 Motorola instruction by instruction and data step by step with a hex Dec keyboard (we didn’t have assemblers and compiler’s in those days ) back in the time when computers were just chips and bead memories. And 100 bit memorie was enormous. I could tell you much more but this is not the place.
@Brian_W.H_Phillips I figured something like that That must be quite a contrast with today …
Well the world has got more complicated but the actual programming much easier (the inspiration is still required and the sleepless nights ).I still program pic.s etc. But that’s all.
yea I first wrote firmware for a M6800 using paper tape and an old teletype terminal I think it all fit in 512 bytes