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JohnK

Ultimaker 3 Network Connection

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I have a bit of a weird problem with my UM3 connection.

For starters, the printer is connected to my wifi network without any problem there, any time I check on the printer, it has an IP address.

I setup a dynamic DNS and port forwarding on my router so that I can access my printer's video stream remotely using "myddnsaddress:8080/?action=stream" , that works fine, all the time without issues.

However..

My connection in Cura to the printer on my wifi network keeps dropping out randomly, printer becomes unavailable and then available again (in cura), when it drops out, I can't access the printer using it's IP address at "xxx.xxx.x.x:8080/?action=stream" on my local network, BUT I can still access it through my ddns without an issue.

Can anyone help ? my knowledge of networking is very limited.

Edited by Guest

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I'm having a similar issue when I use the LAN port of the printer instead of WiFi -- I haven't been able to fully narrow it down (I need to inspect my packets) but the closest I can relate this to is the stream itself and the devices on the network.

When you have no access to your printer, can other devices in your network still access video streams (I think Netflix traffic should fall under this)?

Note that my statement above is just observations -- in my situation, it could simply be an issue with Cura already being authorized on WiFi but not on LAN but the printer could still recognize it as the same client.

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I haven't tried accessing other video streams, I might have to do that and see what happens. I have noticed some issues with some security cameras I have lately, doing something similar, not being accessible from my local network at times, while still being accessible remotely. I'll have to see if the problems occur at the same time.

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Without looking at my guides (and with my memory being as bad as it is now), this reminds me of a multicast issue (since you mentioned your security cameras doing the same) -- I know I've had to enable multicasting on my network on prior devices -- will need to configure a new router I have on my network and check if the issue persists.

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Did anyone solve this issue? My Cura keeps losing connection with my printer as well.

Matt

when using networked equipment requiring stable activity it is always recommended to use a static IP and white list the device on your firewall.

If you wish to maintain DHCP then try white listing your printers mac address on your router. It will keep it in a "trusted" state and not attempt to change its connection configurations.

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Did anyone solve this issue? My Cura keeps losing connection with my printer as well.

Matt

when using networked equipment requiring stable activity it is always recommended to use a static IP and white list the device on your firewall.

If you wish to maintain DHCP then try white listing your printers mac address on your router. It will keep it in a "trusted" state and not attempt to change its connection configurations.

I think this resolved it for me. At least it is working at the moment.

thanks!

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Did anyone solve this issue? My Cura keeps losing connection with my printer as well.

Matt

when using networked equipment requiring stable activity it is always recommended to use a static IP and white list the device on your firewall.

If you wish to maintain DHCP then try white listing your printers mac address on your router. It will keep it in a "trusted" state and not attempt to change its connection configurations.

I think this resolved it for me. At least it is working at the moment.

thanks!

False alarm, still having issues.

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Hello.
I also have the same problem.

The first few days we all had access to the UM3 in our office. Now, without changing anything in the it-infrastruture, some computer have no connection to the UM3. Also a ping to the IP adress isn't possible. It seems like the UM blocks the connection. With another PC in the same IP-Range an the same firewall-options access is possible,

next day another PC could connect and an other not... very curious.

The firewall notes no blocked packages...

Could anybody help me?

 

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20 minutes ago, Matthias Müller said:

Hello.
I also have the same problem.

The first few days we all had access to the UM3 in our office. Now, without changing anything in the it-infrastruture, some computer have no connection to the UM3. Also a ping to the IP adress isn't possible. It seems like the UM blocks the connection. With another PC in the same IP-Range an the same firewall-options access is possible,

next day another PC could connect and an other not... very curious.

The firewall notes no blocked packages...

Could anybody help me?

 

The one thing I forgot to mention is that in a business network we assigned all 3D printers to a VLAN other than the normal user network.  If your business does not have a specific VLAN on WiFi other than the user network then one might need to be created. That is not a lot of work but usually declined unless it is business critical. We didn't d it until we had our 5th printer.

 

If you have NOT changed anything on the network and the configuration is for a business it is always a good idea to configure the printers with a static IP and white list the mac addresses. 

 

 

 

 

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2 hours ago, Marco_TvM said:

Check the connection with System ->  Network -> Connection status.

This will provide the information to check whether or not the printer has gotten a valid IP address, how it's connected and it's associated MAC address.

I have already been through most of the troubleshooting steps and I am in contact with my re-seller. Unfortunately it is looking like I will have to return my unit and get the electrics checked out.  I was just hoping there might be a simpler solution.

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On 1/29/2018 at 10:33 PM, revolutton said:

I have already been through most of the troubleshooting steps and I am in contact with my re-seller. Unfortunately it is looking like I will have to return my unit and get the electrics checked out.  I was just hoping there might be a simpler solution.

yeah mate i have had the same problem with my UNIT getting sent back to they really are making this a hassle, mate i get it i think we need to have more companies pushing for 3 d printer products so we can all master the art :heart::deaf:

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