Topic: Official Thread: AMT - page 8. (Read 678353 times)

More PowerSupply Rail info, if you do have one of these multi rail jobbers you can puzzle it out.
Corsair HX series single rail does not shut down from ripple, it is way to heavily built for that, you can weld with them. $$$ also.

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Quote from: Hark33 on April 12, 2014, 08:26:23 AM

Hello,
I have technical problem with 1 TH/s Desk.
I received 2 1 TH/s Desks yesterday.
I'm using 2 1600W Lepa power supply.
Miners firstly turn off after 5 minutes, I saw, that 1 original fan was set to air flow in, one to air flow out. A set both fans to IN. So now it working for approximately 30 minutes, then one temperature sensor reach 50 degrees - miner shut down. I have miners in room, where is 21 degrees. So I add 2 fans at front side, now it working for 1 hour, but its not a lot.
So, where is a problem? I must put it to fridge?
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This is the same issue we observed with the Platimax 1500W: some PCIe connectors share the same rail, with that you are feeding two hashing units over the same rail and overloading it - the Platimax uses to shut down after a while. Since the Lepa's PCIe pinout looks similar to that one, here is the correct way to set up your CCD with the chosen PSU:

1) take a look at bottom of datasheet page 2 (http://www.lepatek.com/files/LE_ProductBasic_eng/PB_File/G1600-EN.pdf)
2) notice that the distribution of the 6 12V rails is as follows: 12V1:MB, 12V2:MB, 12V3:PCIe1+4, 12V4:PCIe2, 12V5:PCIe5+6, 12V6:PCIe3
3) ensure that you connect 4 hashing units to PCIe connectors 1, 2 , 3, and 6 (left 4 and 5 unconnected)
4) buy or build yourself an adapter from MB-20 (12V1) or MB-16 (12V2) connector to PCIe and feed the 5th hashing unit with that

Bottom line: ensure to feed only one hashing unit through one 12V rail. Even if the PSU uses a common rail, powering two hashing units through a single rail will either cause voltage ripples or over-current protection shutting down the PSU.

Good luck

Thanks a lot Zefir, you have right!

I did it exactly how you said, I connected 4 hashing units to separate PCI-E rails and then I modified CPU power supply connector to PCI-E connector, now working stable!  

Thank you very much again

My ribbon does have a twist due to how it connects to the bp. can see the red side of the ribbon in this photo if it helps

I had one only one bent prong on my of the copper heat sinks on the top most board. I'm hoping it didn't konch the chip out of whack.

are the connectors both supposed to be facing up or should one be up and one be down?

I have one facing up and one facing down. it causes the cable to have a stupid twist to it when I plug it into the backplane and main board. edit: When I tried put the connector back on the ribbon I put it on backwards. It was doing the crazy twist thing from the beginning.

While you are at it, throw up a pix of the ribbon cable that works on yours, need to see what side the red wire is on.
It may help rik.

Thank You

its day 2 of attemting to get my rig running correctly. ill add tht also on arrival of my miner i noticed the bend in the cage and i think its suppose to be there. although i have bent copper heat sinks on some of the a1 chips.

26pin IDC ribbon, got any real electronic shops around ?
Recrimp it with pliers carefully if you wish to attempt repair.

PS another thought, the red wire (pin1) is correct polarity ? cable could have been flipped before crimping.

Hello Toots !

Hey one of the backplanes has some bent pins in the pix. I am sure you saw em, but if not they will short if just crammed in to the blades.

Perhaps for another revision on the backplane you include some sort of led indicator that lets us know it is properly receiving power. just food for thought.

I have it on there as tightly seated as possible, but I have a few of the adapters so I can switch it out and just generally re hook it up to ensure there is a good connection. If you can ship me a new cable on mnday that would be great, I'd appreciate it.

I switched out the adapter and made sure both ends were tightly seated so there should be no issue with power there. If you think it is a faulty backplane feel free to send me one of those as well and I'd be happy to ship this backplane back when I receive the new one.

I am order #690 and #691 how about my 1.2T AMT miners

Hold on a second Loshia before you scare everyone with your provocative statements.

Yes we've said that " Now We are in distress, and may need some help from the community".

But you're contribution has been anything but that, and our miners work fine and you should be the first one to know that and admit that of course. 

Guy'
Is there any one who received UNsmashed unit And was able to make it work?
?
I guess that amt shipped the non working crap to you as DIY kits so you are the only one to be blamed that something is wrong.because it is not complete product, because of power and cable issues and so on
aMT
It is about time to show a working unit as long as you are shipping , do not you think so
And some power measurements of course

We can fedex you out a new one on Monday if you'd like. Also in your previous images you had an adapter going from the 4 pin molex to the back plane, can you check if that's properly secured. In similar situations, we've seen clients get a can't connect to cgminer error message when there is no power being distributed through the back plane.

So is it the ribbon itself that will be the issue? Can it be easily fixed or should I just wait until the one I have on order arrives?

So it doesn't seem to be a power issue.

Thanks for posting images of your rig.

Thanks for your post

I had done all of the above. 

Still no hashing from my miner. 

Going back through and working in reverse when I started it with the GPIO unplugged I see what the regular raspberry should look like. The one I was getting before was definitely blown way up. AMT has made that sound like a GPIO problem, so hopefully when I return next thursday and my new GPIO cable is here then  I will be able to have this thing up and running finally.

Before applying power do this first.

Remove the SDcard from the RPI you must have a backup, it has all the settings and such on it, NOT easy to get another, if it was my machine, I would have a few saved.

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Quote from: opieum2 on April 10, 2014, 01:36:33 PM

Most reliable method IMO is to make a dd image of the SDcard and keep it backed up somewhere (or two) this way if you ever needed to restore it would just be a matter of running the DD command (windows or Linux) back onto the sdcard or its replacement. 

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Someone will splice all this together, and make it pretty I am sure.
More info:

 Upon request of a member to copy this to an original post.

Quote from: NotFuzzyWarm on April 09, 2014, 11:41:21 PM
Do these have a web interface aside from an IP setup, and pool/password menus? Would be nice. (Ants do). All kinds of info including network traffic is available. Also allows for all the usual 'ux type shells, system maint., & other goodies.

Response from AMT:

Yes, but the rigs do not come with the little LCD display because they are mounted to the hard drive trey in the case - mounted either with electrical tape or double sided mounting tape. Also we've seen the little LCD screen flop from side to side because of length of the connector cable, and have shorted the rasPI a few times when the screen accidentally hits the RasPI because the screens sides are all metal. That's the main reason we do not include the screen in the Kit, it's frustrating to get the screen to sit properly on the table and is generally an accident waiting to happen.  The only purpose of the the little LCD display is to show the ip address of the user interface and the current hashrate.

Upon going to the IP address in your browser (Don't bother with internet explorer, use any other browser) you will see the user interface.

Accessing the user interface:

Username: admin
Password: admin

Accessing the ip address without the little LCD screen:

Plug an HDMI cable into the rasPI and start the miner by plugging in the cable. You'll see a big raspberry with a loading bar on the bottom. After which you'll see the root login:

Access cgminer of AMT 1.2Th miner:

username: root
pass: amt

#killall cgminer (the miner is programmed to start immediately, that's why we kill cgminer upon login, as a rule the miner starts running with the credentials you add in the cgminer settings page (Click Settings - then click Cgminer)

#ifconfig

You'll see several addresses, the first being a local network ip address, usually starting with 192.168.1.(some number here)  or 10.1.10.(some number here).  Use that address to find the user interface in your browser.

If you don't have an HDMI cable and monitor free, you can check your router's admin panel for new ip addresses detected after plugging in the network cable and plugging in the miner.

Remember: From the time you plug in your miner, your miner is mining, so make sure all your fans are running and proper cooling is administered. A1 chips heat up quick, and you do not want to over heat your miner.

Workaround encase you don't want to start mining immediately and want to test the Raspberry pi and user interface setup first:

Unplug the GPIO ribbon cable from the back plane before plugging in the network cable and starting the miner. Login to the rasPI with the credential above and get the IP address first, then go to the Ip address in your browser, configure your settings (pool settings, speed, etc) and save. Then power off the miner, plug in the GPIO ribbon cable to the back plane, connect the backplane to the hashing modules - (make sure all the pins from the back plane connectors are in the right slots - look above and below each pin/connector on each module - plugging in the backplane wrong can short hashing modules which may result in the miner not seeing the module.) Then power on your miner and you should be good to go via the user interface or ssh login.

More to come on that for sure, but that was a quick response with a bit more details for those that receive their kit encase we don't get a video up within the next few days.
 
 

I had suggested they take the instructions they do have and post it in their original post. Meaning add them on to the original post. Or some post in the 1st page. Or on their home page or something. Otherwise its going to get lost in this thread.

The screws that are present securing the blades in the chassis seem tight and secure.

The screws that are securing the heatsinks seem tight and secure as well.

The screws that are holding the cooling fans are tight and secure except for one which just fell out.

More pictures and details as I try to get this pile to hash.

Not one bit of guidance from AMT. No instructions included.