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Toby7
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Poor mechanical design of SEXTANT G-5HnD

Sat Nov 03, 2012 4:30 pm

Hi MikroTik Support,

a few hours ago I wanted to install two SEXTANT G-5HnD for a wireless PtP link. The configuration in a test setup was not the problem, but while installing them I nearly got all two devices bricked!
The problem is the very bad mechanical design of the ethernet connectors which also power the device. The mounting of the ethernet jack on the printed circuit is not at all protected against any force effect while installing the whole MikroTik device. So the ethernet jack of one device broke out of the printed circuit :shock:
On the second device I was very careful but nearly the same happend! The problem are the tiny clamps holding the ethernet jack. They must be much more robust for a mast mounted outdoor device..... If you are on a ladder in 5m height there is no chance to handle such a device with a kid glove.

But there is another thing which made me upset while mounting the devices. If you plug in a normal ethnert cable there is no chance to close the cover of the body housing. I had to use a cable with a very small ethernet connector and even the bend protection had to be removed.

Look at the pictures for a better description. At the moment I am very angry about this poor build quality! :? So I hope the bricked SEXTANT G-5HnD will be carried out at MikroTik's expense...

Image

Image



Best regards
Toby
 
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tomaskir
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Re: Poor mechanical design of SEXTANT G-5HnD

Sat Nov 03, 2012 6:06 pm

There is a hole for the cable, you arent meant to close it down with the cable in the gap...

We have installed a bunch of Sextants even with thick outdoor FTP cable, and it fits no problem...
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Toby7
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Re: Poor mechanical design of SEXTANT G-5HnD

Sat Nov 03, 2012 7:24 pm

Of course I know the hole for the cable and I did use it :) The problem here is NOT how to get the cable out of the body housing but how to close the cover. A normal ethernet jack with bend protection is 35mm in length and then you have to add the minimum bend radius of the cable. In my case this was too much I could not close the cover even when I did use the cable hole. This construct is simply bigger in length than the space between ethernet jack and body housing.

You you must bend it to 90° two times in this small area there.... Each bending means a heavy force effect on the brittle ethernet jack on your MikrotTik board. The force was too much for my board.... :(

You must admit that these ethernet jacks are very poor mounted on the PCB. :(
 
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tomaskir
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Re: Poor mechanical design of SEXTANT G-5HnD

Sat Nov 03, 2012 7:34 pm

Of course I know the hole for the cable and I did use it :) The problem here is NOT how to get the cable out of the body housing but how to close the cover. A normal ethernet jack with bend protection is 35mm in length and then you have to add the minimum bend radius of the cable. In my case this was too much I could not close the cover even when I did use the cable hole. This construct is simply bigger in length than the space between ethernet jack and body housing.

You you must bend it to 90° two times in this small area there.... Each bending means a heavy force effect on the brittle ethernet jack on your MikrotTik board. The force was too much for my board.... :(

You must admit that these ethernet jacks are very poor mounted on the PCB. :(
Why bend it 90° twice? As I mentioned, we have installed these with thick outdoor FTP cables without any problems, just straight from the cable hole into the ethernet jack. Raid drop loop, cable reserve and everything else is then outside of the enclosure. While I agree that the mounting of the jack to the PCB seems fragile, we have not had any problems yet after ~10 sextant and ~20 SXT deployments.
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Toby7
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Re: Poor mechanical design of SEXTANT G-5HnD

Sat Nov 03, 2012 8:02 pm

Why bend it 90° twice? As I mentioned, we have installed these with thick outdoor FTP cables without any problems, just straight from the cable hole into the ethernet jack. Raid drop loop, cable reserve and everything else is then outside of the enclosure. While I agree that the mounting of the jack to the PCB seems fragile, we have not had any problems yet after ~10 sextant and ~20 SXT deployments.
See the picture for how I did bend the cable. Doing this without tow bend would mean even more forces on the ethernet jack... And I have the space problem in this small area.
Ok you may have the experience in handling those devices but I have not :? The problem here is not plugging the cable once but during my test setup I had to plug/unplug that several times. Unplugging the cable is very tricky because my fingers are too big for getting the cable hook out of the ethernet jack. Each time doing that loosens the jack more....


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cbrown
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Poor mechanical design of SEXTANT G-5HnD

Sat Nov 03, 2012 8:10 pm

Are you using a booted cable? We have never had any problem but we don't put boots on our cables.

You could also very easily resolder the ethernet port back on.
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Toby7
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Re: Poor mechanical design of SEXTANT G-5HnD

Sat Nov 03, 2012 8:19 pm

Are you using a booted cable? We have never had any problem but we don't put boots on our cables.

You could also very easily resolder the ethernet port back on.
Yes it is a normal CAT 6 patchcable. Without those protection I think there are no problems.
How can I open the case without damage?
 
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Poor mechanical design of SEXTANT G-5HnD

Sat Nov 03, 2012 8:35 pm

How can I open the case without damage?
What do you mean?
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Toby7
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Re: Poor mechanical design of SEXTANT G-5HnD

Sat Nov 03, 2012 8:48 pm

I meant the body housing :D Ok I got the PCB lying in front of me. Soldering seams to be easy? :? The small pins are close together... I will try soldering tomorrow. After that I will fix this ethernet jack with additional hot glue.
 
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honzam
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Re: Poor mechanical design of SEXTANT G-5HnD

Sat Nov 03, 2012 10:54 pm

Offers the another question: When will have all rb711 (sextant) metal ethernet?
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Re: Poor mechanical design of SEXTANT G-5HnD

Sat Nov 03, 2012 11:40 pm

Each time doing that loosens the jack more....
When it is new, and not loose at all (or after you fix it), use epoxy to glue the cat5 port to the board.

Then, the only way it will ever break loose is if you break the entire board... and that's not going to happen.
 
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Re: Poor mechanical design of SEXTANT G-5HnD

Sun Nov 04, 2012 1:53 am

There is a lot of fix to this issu, but MT should look into the real problem here. REALLY poor, cheep design. We send all our broken sextant back to distrubutor.

The fix to sxt with bended input is nice, but sextant rj45 is really bad. Sometimes, to have a device as cheep as possible, is not the way to go. We DONT sell this to our cutomer, as we would have to much returns.
 
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Re: Poor mechanical design of SEXTANT G-5HnD

Sun Nov 04, 2012 11:51 am

Had exact same problem with outdoor cable, the LAN ports also broke off. Had to glue them back on, very very bad design.
 
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Poor mechanical design of SEXTANT G-5HnD

Sun Nov 04, 2012 1:59 pm

The good news is they have switched to the metal connector.

http://forum.mikrotik.com/viewtopic.php ... 91#p319771
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Toby7
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Re: Poor mechanical design of SEXTANT G-5HnD

Sun Nov 04, 2012 2:39 pm

There is a lot of fix to this issu, but MT should look into the real problem here. REALLY poor, cheep design. We send all our broken sextant back to distrubutor.

The fix to sxt with bended input is nice, but sextant rj45 is really bad. Sometimes, to have a device as cheep as possible, is not the way to go. We DONT sell this to our cutomer, as we would have to much returns.
I agree with your opinion, this is not at all a device suitable for relatively ruggedized outdoor use. I would for sure pay 20$ more to get a better device.
MikroTik please buildt in more quality!

By the way my soldering did not work :( The soldering process was not the problem, each pin is soldered correctly but I cannot get the device up and running any more. No lights when I plug in the connector! :(
 
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Re: Poor mechanical design of SEXTANT G-5HnD

Sun Nov 04, 2012 6:59 pm

The good news is they have switched to the metal connector.

http://forum.mikrotik.com/viewtopic.php ... 91#p319771

This was my post. See date - 1.Jun 2012
Now is September 2012 - new Sextant and rb711 still with plastic ethernet :cry: Why?
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Poor mechanical design of SEXTANT G-5HnD

Sun Nov 04, 2012 7:23 pm

It's not necessarily "new". Could have arrived in a batch of 300 to a distributor in june and now just sold to the customer. It sometimes can take a while for things to circulate.

All of the SXTs we just got in have the metal connectors. But also got a handful of 711Gs the have plastic.
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Re: Poor mechanical design of SEXTANT G-5HnD

Sun Nov 04, 2012 8:03 pm

SXT always have metal ethernet
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Poor mechanical design of SEXTANT G-5HnD

Mon Nov 05, 2012 12:08 am

SXT always have metal ethernet
That's entirely possible. We normally haven't used a lot of SXTs until recently when we could get the Gs.
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Re: Poor mechanical design of SEXTANT G-5HnD

Mon Nov 05, 2012 7:59 am

SEXTANT uses RB711 inside. In previous revisions it had a plastic ethernet, but in new revisions it also has a metal Ethernet, to solve the above issues. If you have encountered this issue, contact the seller for RMA replacement.
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Toby7
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Re: Poor mechanical design of SEXTANT G-5HnD

Mon Nov 05, 2012 11:37 pm

Ok I have written an email to the reseller yesterday. Maybe I get an answer tomorrow...
 
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Re: Poor mechanical design of SEXTANT G-5HnD

Fri Nov 09, 2012 12:20 am

Hi Support Team,

I have written an E-Mail to http://www.mikrotik-shop.de / FMS Internet-Service already 4 days ago without any response. :?
Can you please get in contact with them? A certified MikroTik shop should provide a better service to customers....

Toby
 
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Re: Poor mechanical design of SEXTANT G-5HnD

Wed Nov 14, 2012 1:34 pm

Agreed - its happened to us also, not good if you are 20m up a tower. Very poor design. Will try to contact reseller.
 
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Re: Poor mechanical design of SEXTANT G-5HnD

Thu Nov 29, 2012 11:45 pm

SEXTANT uses RB711 inside. In previous revisions it had a plastic ethernet, but in new revisions it also has a metal Ethernet, to solve the above issues. If you have encountered this issue, contact the seller for RMA replacement.
Are the new revisions with the metal port being distributed now?
 
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Re: Poor mechanical design of SEXTANT G-5HnD

Fri Nov 30, 2012 2:48 am

SEXTANT uses RB711 inside. In previous revisions it had a plastic ethernet, but in new revisions it also has a metal Ethernet, to solve the above issues. If you have encountered this issue, contact the seller for RMA replacement.
Are the new revisions with the metal port being distributed now?

please check the date of this post (when the first customers started to receive them):
http://forum.mikrotik.com/viewtopic.php ... 67#p319767
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Re: Poor mechanical design of SEXTANT G-5HnD

Mon Dec 03, 2012 3:44 pm

SEXTANT uses RB711 inside. In previous revisions it had a plastic ethernet, but in new revisions it also has a metal Ethernet, to solve the above issues. If you have encountered this issue, contact the seller for RMA replacement.
Are the new revisions with the metal port being distributed now?

please check the date of this post (when the first customers started to receive them):
http://forum.mikrotik.com/viewtopic.php ... 67#p319767
We just received new stock of SEXTANT G-5HnD today direct from MikroTik and the 711 boards still have the plastic ethernet ports. If the 711's were all changed over to metal ethernet ports in June, why are sextants still being delivered with the plastic connector in December ??
 
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Re: Poor mechanical design of SEXTANT G-5HnD

Mon Dec 03, 2012 5:16 pm

We also still have plastic ethernet in sextant and 711. My post in Jun 2012 was exception
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Re: Poor mechanical design of SEXTANT G-5HnD

Fri Feb 08, 2013 10:59 am

We have just encountered the same issue on six NEW sextant bought from Landatel. This batch arrived to their warehouse 2/2/2013, which tells me it should not be of the old revision.

We will return them, but this means we will have lost time and money for nothing else than believing in Mikrotik being a better quality than UBNT. Our mistake, and will not be repeated.

Thouroughly disapointed.

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Re: Poor mechanical design of SEXTANT G-5HnD

Mon Apr 08, 2013 7:54 pm

Mikrotik must fix this problem. We have had metal ethernet ports break away from the board on three of four of the SEXTANT 5HnD. After the first one broke, we tried to be careful.

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