Topic: BFL board project COINTAMINATION - EU facility - ORDERS OPENED for Chili - page 6. (Read 73081 times)

I have found most of my boards need some underside cooling, when I have an airflow under the board, then the hash rate rises by 2 - 3 Gh

The asic temperature then also rises to about 70c but the other temperature (mosfets?) stays the same 44c to 47c.

One board crashes If I give it underside air, but apart from that it works well.


There is another problem showing up.  If I open the door or window and allow the ambient temperature to drop, then they all fall over.

I have changed EVO 212 fan to heatsink side where you have the "box" to prevent aditional cooling on VRM components.
This helped to stability. Boards are now quite stable on 36-39Ghs range.
But still have an adicional fan blowing PCB underside

Regards

"Draft Protection" nice call I moved it away from the fan and it is holding steady right now at 32GH/s at 1.06v. I got them both assembled and they are both holding at 1.06v the other hashes at 35GH/s.

Question for Lucko: Did you test each board and decide the optimal firmware (I know, a lot of work) or are you putting the same firmware on all boards?

I too am pleasantly surprised I expected a host of issues and really have had none (except for damage from shipping) other than moving one out of the way of the fan.

Thanks...

EDIT: Oh by the way the damn red led lights made my heart jump when I first powered it up. I thought uh oh that doesn't look right...

Thanks Lucko , Mr Teal and all the others who have tirelessly worked on these boards.

I received both of mine yesterday in perfect condition, and they both start right up and hash around 35K and 56C with evo212 coolers. I am running both off of a single Seasonic G550 which isn't even breaking a sweat.

Overall, much better than I expected given all the problems. Great job!

I have 2 boards that need some "draft protection" over the power modules but still need additional underside cooling.

https://www.dropbox.com/s/a5t436j4y788r7p/2014-01-28%2021.46.42.jpg (any moving air over the modules and it crashes)

If its reaching 38Gh it will need the voltage limiting software

I got my boards back from ChipGeek and got the first one assembled. It does a very slow ramp up on the volts but as soon as it hits 1.1v it crashes. After a bit it resets itself and does it all over again. It doesn't force cgminer to crash though. So forgive me but what "trick" should I be doing to keep it hashing?

Hi Lucko - first, I want to say I am NOT upset, in any way.    These things happen and my feedback is to hopefully help other's still waiting to get their boards without damage.  I am happy I was able to be part of this gb - you have been excellent to work with and I would join you in more projects in future, without doubt.

Thanks to MrTeal, too, for licensing the design to our group. I'm sure the outcome hasn't been what you hoped, but you've been a big help getting things straight.

Back to boards and shipping. I believe that if there was something rigid or semi-rigid placed in between the boards before they are wrapped that this wouldn't happen. A small piece of cardboard, or even a small foam packing sheet would do.  I believe that your packing is a good plan, but it looks like it allowed the boards to shift laterally on top of each other during loading dock football shipping, so the end of one board pushed the caps laterally and off the solder.

I think that's the core problem. It looks like the caps were pushed away from the boards at the top:
EDIT: In reviewing my own pictures, it becomes obvious that the power block is what pushed these same caps off when the boards are rotated to each other...
https://s3.amazonaws.com/www.annagreentechnology.com/lucko-chili/20140127_133615.jpg

That said, the solder doesn't look very good to begin with either, as you can see from this pic. Neither the cap nor board in this pic shows signs of decent soldering, and there's absolutely nothing at all to clean off to redo it... I don't think this was the main issue, but I don't think it helped:
https://s3.amazonaws.com/www.annagreentechnology.com/lucko-chili/20140127_133622.jpg

Then there's the box - like GrapeApe indicated of his, no signs of "abuse". The boards were definitely a tight fit in it and it has clearly traveled a long way (my have even been examined by a friendly government safety representative at some point) - but it doesn't look like it was "abused":
https://s3.amazonaws.com/www.annagreentechnology.com/lucko-chili/20140127_133357.jpg
https://s3.amazonaws.com/www.annagreentechnology.com/lucko-chili/20140127_133406.jpg

Summary:
I hope this helps figure out how this has happened on 2 shipments. I'm not upset, although my boards are not hashing yet. I'll be attempting to fix these myself later today when I have time to warm up the soldering iron. I have the tools and I can do this work, but I am not an electrical engineer, so I can only hope it goes smooth and there is no other unseen damage.

If anyone has any suggestions or guidance on things I should look out for, or be careful of, or general tips on cleaning/re-soldering/testing things - I welcome any help.  Seems simple enough so I'm confident it won't be an issue.

Not as lucky as GrapeApe in having ChipGeek right up the road - I'm in the Charlottesville Virginia area, so if there's anyone around me that has some better thoughts, I'm all ears...

Thanks - sorry for the long-read.

Hi Lucko
If you post a package, the shippers will find a way to break it.(On long haul flight stopovers, the sights in transit bays are horrendous)
I "borrowed" the good lady's manicure set to straighten the bent pins. Boards ok, manicure set, -1.

I turned them face to face to protect pins that were beaned on Mudbankkeith(and some other) boards. It was a single piece of bubble wrap put it was 2 times the length and 3,5 times width of the boards. And there was additional around the sides and top of the box but not warped around. Other side had 3 additional and bottom had additional 7 layers from side boards beeping warped. It had enough of bubble warping around since it was minimal of 5 layers and up to 10 on same places... I agree that box could be bigger but I didn't had them. And you need a lot of force to get capacitors off the board... So I really don't see how could that happened without something strange in transport even with smaller box... Unless lead free solder get that fragile in long transports.

This is how 2 card pack look like. There is one layer of bubble wrap in the between them.

https://www.dropbox.com/s/nbvnvji49snzfcd/2014-01-28%2009.12.03.jpg

I'm pretty sure this is amount of bubble warping used in your package...

https://www.dropbox.com/s/i7t65gchvqxy1kb/2014-01-28%2009.13.20.jpg

One with the card on used to wrap them and another to put around it in a box so it will not move.

My theory is(since you say the is nothing visible) that I used to much and when it gets pressure from top and bottom it somehow move them one into another with enough force to do it... But I think I will adopted back pin bending position for US and probably the rest of the world just to be sure...

Sorry to hear that, I just dropped mine off with ChipGeek to have him repair them. Lucky to live in the same city as him. I should have them back tomorrow.

GPL questions aside, opening the firmware would be a real nice thing to do for us users.  It would probably speed up debugging and save us from losing some precious hashing time.

Is there an advantage in keeping it closed?  I can't imagine someone taking it and making clone boards.  I don't think BFL even sells 65nm chips anymore...

I received my boards today, as well. Unfortunately, they both have same damage as GrapeApes... :-(

Posting from my phone so not sure how to include pics in forum -- will post when home later.

Package does not appear damaged or mis-handled...

EDIT: Not going to give anyone a hard time here, but this is 100% due to bad packing. Boards shipped face-to-face wrapped together in single piece of bubble wrap in a box that they *barely* fit in... No offense Lucko, but these were never going to go all the way around the world undamaged. I can fix these, but definitely suggest better packing for all future shipping. No doubt in my mind.

I confirm this issue. I solved it installing cgwatcher and configure it to restart bfgminner every 6 hours - If this ocours only loose this minning time. Now i have a quite stable setup even using 3 boards with pre heating firmware.

regards

I, for one, think threats of suing someone are chickenshit...

How many Chilis are out there hashing? How would this gb be doing without his help troubleshooting?

Design your own board and get to hashing. Leave MrTeal alone.

I don't know him. Don't know you. Don't know anyone on here, but what I've seen on this forum, bitcoin is bringing out the worst in quite a few of you.

 

EDIT: not to mention, these people bitching are probably the ones not willing to accept the 30-32GHS firmware that both MrTeal and Luckos Chilis were offered to do... probably whining you can't overclock the shit out of it...  piss off.

I don't know why I feel the need to apologize for others but I'm truly sorry for all the bullshit that has been directed your way from this group buy.

I would love to see your evidence for that. Using the same miner to host command protocol does not mean we are using BFL's code.

Hmmm .... looking at the firmware closer ... it looks like that it is using parts of the original code released from BFL.
This code was released under GPLv2 license , so I guess MrTeal has to publish the firmware source, otherwise a few (angry) people will try to sue him for this.

    one4many

This is a 680 µF capacity (681) and not a 68 F capacity (680). The last digits is the 10^X multiplier:
0 = 10 ^ 0 = x1
1 = 10 ^ 1 = x10
2 = 10 ^ 2 = x100
...

or my knowledge is maybe wrong?

But in fact, I wonder me that there 3x 0Z1 and 1x 323  (on my Mr. Teal Chillies) types are soldered and why...
EDIT: Ah, it's the taping code.

Cheers...

That's it thanks.

No obvious damage to box at all.

I should have been more clear the cap was loose in the box. I don't remember noticing a missing lead when I took the images and when I look close at the images it looks like both leads are there on each cap so I could have done it myself moving them around to take the images (doubtful though), but I found the lead in the box as well after noticing it was broken so I don't know what to tell you.

That would be it

http://www.digikey.com/product-detail/en/PCG1C681MCL1GS/493-3100-1-ND/1662570

EDIT: But for damage that you are talking about(broken off the leads) there should be a lot pressure to make this happen. I can't imagine how could that happen without living obvious damage to the box....