Re: Question on MaximDL Stability against USB Disconnects


Mar 2, 2015

 


----------------------------

#59027 Mar 2, 2015

Hi-I'm considering switching to MaximDL Pro since I have been using TheSkyX Pro but am suffering occasional hang-ups that appear to be generally associated with USB disconnects of 1 or more of my devices (camera, filter wheel, autoguider, focuser controller). That is, I general find a Win7 (64bit) .Error!. message on the screen: .USB port writefailure.disconnecting!. (which never specifies the device) while TheSkyX basically just freezes with a device disconnect message (again never specifying which device it was that disconnected).�� Meanwhile the displays indicate all devices are still connected. Since I get these USB disconnects not infrequently, I lose a lot of time in later returning to the obs to discover data collection had stopped an hour ago.���� I'd like to know if MaximDL Pro users suffer this type of freeze/hangup when users have the inevitable (to me) occasional USB disconnects or whether MaximDL avoids that and handles the device controller in background threads in a way that continues collecting data without simply stopping.�� This may be too much to ask of any s/w and I am trying to identify and replace/repair the offending device but so far not successfully.��

Thanks for any thoughts on the matter. I may try the free trial (if it includes Pro) and just test this, but if the same thing can occur with Maxim, I'll just continue to try to find a way to isolate the hardware problem.

Thanks,-Jeff



----------------------------

#59028 Mar 2, 2015

Yes. This is either a cable problem or you're using some power saving feature thats turning the ports off. Lots of posts here over the years about this. I had 4 in 4 hours last time out, fixed ��by using different port on my hub. Dont switch for this reason.Debug the problrms insteadRgrds-Ross





-------- Original message --------

From: "jeffweiss9@... [MaxImDL]"

Date:03/02/2015 10:31 PM (GMT-08:00)

To: MaxImDL@yahoogroups.com

Subject: [MaxImDL] Question on MaximDL Stability against USB Disconnects

��Hi-

I'm considering switching to MaximDL Pro since I have been using TheSkyX Pro but am suffering occasional hang-ups that appear to be generally associated with USB disconnects of 1 or more of my devices (camera, filter wheel, autoguider, focuser controller).That is, I general find a Win7 (64bit) .Error!. message on the screen: .USB port write failure.disconnecting!. (which never specifies the device) while TheSkyX basically just freezes with a device disconnect message (again never specifying which device itwas that disconnected).�� Meanwhile the displays indicate all devices are still connected. Since I get these USB disconnects not infrequently, I lose a lot of time in later returning to the obs to discover data collection had stopped an hour ago.���� I'd liketo know if MaximDL Pro users suffer this type of freeze/hangup when users have the inevitable (to me) occasional USB disconnects or whether MaximDL avoids that and handles the device controller in background threads in a way that continues collecting datawithout simply stopping.�� This may be too much to ask of any s/w and I am trying to identify and replace/repair the offending device but so far not successfully.��





Thanks for any thoughts on the matter. I may try the free trial (if it includes Pro) and just test this, but if the same thing can occur with Maxim, I'll just continue to try to find a way to isolate the hardware problem.



Thanks,

-Jeff



----------------------------

#59029 Mar 2, 2015

Jeff



You might try disconnecting each USB cable at the computer one at a

time. After you disconnect each one, check and see if your computer is

still frozen. If it isn't frozen, you just disconnected the bad actor.



It probably won't work but it is worth a try.



Jim Jones



On 3/2/2015 10:31 PM, jeffweiss9@... [MaxImDL] wrote:

> Hi-

> I'm considering switching to MaximDL Pro since I have been using TheSkyX Pro but am suffering occasional hang-ups that appear to be generally associated with USB disconnects of 1 or more of my devices (camera, filter wheel, autoguider, focuser controller). That is, I general find a Win7 (64bit) .Error!. message on the screen: .USB port write failure.disconnecting!. (which never specifies the device) while TheSkyX basically just freezes with a device disconnect message (again never specifying which device it was that disconnected). Meanwhile the displays indicate all devices are still connected. Since I get these USB disconnects not infrequently, I lose a lot of time in later returning to the obs to discover data collection had stopped an hour ago. I'd like to know if MaximDL Pro users suffer this type of freeze/hangup when users have the inevitable (to me) occasional USB disconnects or whether MaximDL avoids that and handles the device controller in background threads in a way that continues collecting data without simply stopping. This may be too much to ask of any s/w and I am trying to identify and replace/repair the offending device but so far not successfully.

>

>

> Thanks for any thoughts on the matter. I may try the free trial (if it includes Pro) and just test this, but if the same thing can occur with Maxim, I'll just continue to try to find a way to isolate the hardware problem.

>

> Thanks,

> -Jeff

>

>



----------------------------

#59030 Mar 3, 2015

Jeff, I had a lot of problems like this with Maxim DL Pro.�� It always boiled down to USB problems.�� The main culprits were the powered USN hub itself, the USB jacks (corrosion interfering with good connectivity) and the USB extender cables.�� I got a better powered USB hub, stopped using 5 meter extenders, and found a good cleaner for the connectors.�� Been a long time since I've had one of the mysterious crashes that drove me crazy.

John







----------------------------

#59031 Mar 3, 2015

The problem is almost certainly USB-related, not a problem with the software.

. ...tim stoneabout.me/tim_stone



.

.



----------------------------

#59032 Mar 3, 2015

Jeff -- If you're not using a laptop on batteries, maybe disabling the USB selective suspend would solve the problem.

See�� www.sevenforums.com/tutorials/147369-usb-selective-suspend-turn-off.html��

Joe Morris ��



----------------------------

#59033 Mar 3, 2015

In my opinion, you're just seeing a typical USB problem.... has nothing to do with the skyX vs Max... I've seen USB problems using both. ..

Here's a few ideas ( that I used to kill the problems ).

Make sure the longest USB cable used is isn't more than about 12 ft.. If you have to go over that, get GOOD powered ext cables ( trip lite has good ones ).Also consider USB over Cat 5 .( some devices work very well... some don't.. Make sure you get the right ones that will allow isync comm.. I use Icron Ranger 2304s....

If you have the option.... DON"T power the device via USB. .( sometimes you don't have options ( SBIG Sti for example ) with some cameras...but if you have the option, use ext power ( and make sure that power is CLEAN )... pref a battery in the system to make sure the power never skips a beat.

Bottom line, I HATE USB.... but till all devices are IP addressable, we have to live with it. . USB can never be as reliable as IP but with a little effort, you can get close.

Al

Al Acker



----------------------------

#59034 Mar 3, 2015

Thanks very much for all the suggestions which is heartening at this stage. I will continue to focus on finding the problem as a USB problem and not think different software is going to save the day.

Just some feedback:Ross- I will start replacing some cables (a bunch are standard 15' which I hope is still ok). I don't have any extra ports on my industrial-grade powered hub but I guess i could get another one.

Jim- I will try sequentially disconnecting USB cables after the next hang, although it is not the computer that is hung in my case but just TheSkyX Pro, although other TSX functions like the autoguiding continue on just fine, so even TSX is only partially hung: it just stops taking new subs in the middle of a series.

John- I'll check the USB jacks haven't gone bad or corroded and try cleaning the connectors with alcohol.�� I guess I can consider upgrading from my ~$50 industrial-grade hub to $200 class ones that I have seen.

Tim- Thanks, I'm getting the message that it's USB related and salvation isn't coming through software.

Joe- I will try USB selective suspend (although I think I did that long ago and did check last night that all the USB generic hubs had the power saving turn off UNchecked.

Al- Hope 15' is close enough to 12'.�� Cables from Fry's are cheap Chinese cables at 3',6' or 15'.USB over Cat 5 to turn everything into an IP would be great. I'll look into Icron Ranger 2304s.�� Three of the devices in the hub (Camera, FW, Starizona Focuser) have independent power. Only the autoguider (Orion SSAG) is powered from the hub and it is banging away continuously when everything is operating.�� But removing that from the hub and turning off autoguiding (plus removing the Starizona Microtouch Focuser) did apparently prevent a hangup during once test of several hour duration. So maybe it will be worth my just removing the Autoguider from the hub and putting that unit into the laptop. I also have an alternate autoguider (SBIG ST-i) that, although still powered from USB, might behave better.�� I'll definitely try those experiments at the top of the list.

Thanks again everyone.�� If anyone can think of any follow-up or anything else, I'd be glad to hear it.-Jeff



----------------------------

#59035 Mar 3, 2015

You have been using a laptop (Dell Inspiron Latitude E6400) thiswhole time, did you ever swap it out to see if maybe the laptop isthe issue?



Tom

On 3/3/2015 2:45 PM,jeffweiss9@... [MaxImDL] wrote:

.Thanks very much for all the suggestions which isheartening at this stage. I will continue to focus onfinding the problem as a USB problem and not thinkdifferent software is going to save the day.



Just some feedback:

Ross- I will start replacing some cables (a bunch arestandard 15' which I hope is still ok). I don't have anyextra ports on my industrial-grade powered hub but I guessi could get another one.



Jim- I will try sequentially disconnecting USB cablesafter the next hang, although it is not the computer thatis hung in my case but just TheSkyX Pro, although otherTSX functions like the autoguiding continue on just fine,so even TSX is only partially hung: it just stops takingnew subs in the middle of a series.



John- I'll check the USB jacks haven't gone bad orcorroded and try cleaning the connectors with alcohol.. Iguess I can consider upgrading from my ~$50industrial-grade hub to $200 class ones that I have seen.



Tim- Thanks, I'm getting the message that it's USB relatedand salvation isn't coming through software.



Joe- I will try USB selective suspend (although I think Idid that long ago and did check last night that all theUSB generic hubs had the power saving turn off UNchecked.



Al- Hope 15' is close enough to 12'.. Cables from Fry'sare cheap Chinese cables at 3',6' or 15'.

USB over Cat 5 to turn everything into an IP would begreat. I'll look into Icron Ranger 2304s.. Three of thedevices in the hub (Camera, FW, Starizona Focuser) haveindependent power. Only the autoguider (Orion SSAG) ispowered from the hub and it is banging away continuouslywhen everything is operating.. But removing that from thehub and turning off autoguiding (plus removing theStarizona Microtouch Focuser) did apparently prevent ahangup during once test of several hour duration. So maybeit will be worth my just removing the Autoguider from thehub and putting that unit i! nto the laptop. I also havean alternate autoguider (SBIG ST-i) that, although stillpowered from USB, might behave better.. I'll definitelytry those experiments at the top of the list.



Thanks again everyone.. If anyone can think of anyfollow-up or anything else, I'd be glad to hear it.

-Jeff







----------------------------

#59036 Mar 3, 2015

Tom-Thanks. That is near the top of my list.�� I have a desktop next to the equipment now all ready to swap in in place of the Latitude. Other tests are in progress at the moment - in particular I've got one configuration now that has gone 3 hours now without a hang so I think I may finally be on to something.�� TBD.-Jeff



----------------------------

#59037 Mar 3, 2015

...looks like I have isolated the problem and it appears to be my industrial-grade powered USB hub since Ports 3 and 4 of the four ports have now hard-failed and won't connect anything to USB device to them, much less the Starizona Focuser Controller and Orion SSAG autoguider that were originally plugged in there.�� Operating with those two devices plugged into ports on the laptop has given me 235 minutes without failing.Those two ports have likely been flakey and failing for some time, generating all the havoc I've observed with USB connections.�� At least that's what current testing suggests and hopefully holds true.Thanks for the help here.-Jeff



----------------------------

#59038 Mar 4, 2015

Can anyone recommend a higher-grade industrial rated USB hub?�� I'm looking at this one at the moment:

Industrial Isolated USB Hubs - B&B Electronics

Industrial Isolated USB Hubs - B&B Electronics Ulinx isolated industrial USB hubs are built to withstand industrial networking hazards like shock, drop, vibration, interference and temperature extremes.



----------------------------

#59039 Mar 4, 2015

��www.newegg.com/Product/Product.aspx?Item=N82E16817707294 ��has worked well for me. I sometimes forget to even plug the power in and it hasn.t failed me, but I.ve only had it for 6 months. The fact that it.s technically USB 3.0 has not been a problem. I have plugged into it . my AP Mach1 mount, two SBIG cameras and an OPTEC focuser as well as the PC I use to control the system. I wanted something that would run on 12 volt power if necessary. ��Rgrds-RossFrom: MaxImDL@yahoogroups.com [mailto:MaxImDL@yahoogroups.com] Sent: Wednesday, March 04, 2015 9:03 AMTo: MaxImDL@yahoogroups.comSubject: [MaxImDL] Re: Question on MaximDL Stability against USB Disconnects



----------------------------

#59041 Mar 4, 2015

Thanks, Ross, Dick-My laptop doesn't support USB 3.0 and, anxious to get going, I just purchased the B&B Electronics model UHR204 USB2 hub whose specs look great for reliability. The I don't mind the extra $$ for a hub after this.�� Thanks again for the help and suggestions I received here.-Jeff



----------------------------

#59043 Mar 9, 2015

Dick, thank you very much. There is the100,000th discussion going on the DC-3 Dreams Comm Center aboutflaky USB versus software victories over hardware (ha ha) and youradvice is timely. I have echoed it to that discussion and also puta sticky in the Hardware/Driver section recommending these hubs.Thank you again!



. -- Bob



Ican.. I used B&B exclusively as they use industrialrated semiconductors rated for -35 C where as consumer gradeare rated for 0 C.. I regularly get -20 C in winter in Maineand many consumer grade products will fail. .To runremotely, you should be able to cycle the power to theB&B as some cameras, filter wheels, etc. will not cycleif they get power from the hub.Dick .From:MaxImDL@yahoogroups.com [mailto:MaxImDL@yahoogroups.com]

Sent: Wednesday, March 04, 2015 12:03

To: MaxImDL@yahoogroups.com

Subject: [MaxImDL] Re: Question on MaximDLStability against USB Disconnects



----------------------------

#59046 Mar 10, 2015

Jeff,

I wrap my USB hub in an electric heating pad set to low. I had trouble in cold weather before that, but now I've gone down to -10F without problems any more.

Good luck,-Joe



----------------------------

#59047 Mar 10, 2015

Ha ha Joe, you crack me up! People putlittle 10W light bulbs in their computers too.

I wrap my USB hub in an electric heating pad set tolow. I had trouble in cold weather before that, but now I've gonedown to -10F without problems any more.



----------------------------

#59049 Mar 14, 2015

Hi Peter,The maximum continuous rating of the board is 5A (inductive) - Maxdome Manual pg 15.

I'm currently using a Sirius dome with Maxdome II without battery. I've installed a large electrolytic capacitor to help with the starting current of the motor (about 47,000uF). The supply does not dip anywhere near as much with that installed. The motor continuous running current is 5A at 24V and only draws about 1A-2A while rotating the dome at around 12V-13V. The battery supply would be running at 13.6V (fully charged, less a little), so dropping the voltage to 12V would slow the dome rotation.

I was concerned about the thump that the motor imparts��onto the rack (running around the inside of the dome) when starting in one direction, so I'm running an old ��5A 15VDC laptop brick supply,��a soft starter (A$50), two relays (A$ 6 - 10A - energise and��direction control), two bridges (A$4 -��simple mechanism to drop the voltage to the Maxdome board from 15VDC to 12.4DC). The motor no longer imparts a thump into the structure (quieter too) and the dome rotates faster. It's been running for about 100hrs like this and has done thousands of starts.Cheers,Chris



Contact Us
This Site's Privacy Policy
Google's privacy policies

S
e
n
i
o
r
T
u
b
e
.
o
r
g