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Posted · Cura not connecting to printer

I have the ender 3 pro and I am trying to upgrade the firmware. I have installed Cura and added the printer, but when I try to select the upgrade firmware button it says it is not connected to the printer. I've tried activating the printer, but nothing seems to happen.

 

Help?

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Posted · Cura not connecting to printer

At the top right of Cura click on Marketplace / Installed and then scroll down and make sure "USB Printing" is enabled.  When Cura starts it will open the USB port to the printer.  The port must be open to update the firmware as well as to print from Cura.

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Posted · Cura not connecting to printer
20 hours ago, breezy2u said:

I have the ender 3 pro and I am trying to upgrade the firmware. I have installed Cura and added the printer, but when I try to select the upgrade firmware button it says it is not connected to the printer. I've tried activating the printer, but nothing seems to happen.

 

Help?

 

My understanding with the Ender 3 and likely the Pro also, is that it does not come with an bootloader pre-installed what is needed to be able to update the firmware via USB.

 

So to be able to upgrade via USB you will need to flash a bootloader to the main controlboard of the printer. For this i would say it's best to check for step by step guides because you could brick the printer if you make a wrong step, you also have to have an Arduino and wire it up to the printers control board and then link the Arduino to a PC to be able to flash the bootloader to the printer.

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Posted · Cura not connecting to printer

This is the kind of thing where some support from Creality would be appreciated.  I installed a 1.1.5 silent board in my Pro and I think that one does come with a bootloader (whatever that is!).

 

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Posted · Cura not connecting to printer
2 hours ago, GregValiant said:

This is the kind of thing where some support from Creality would be appreciated.  I installed a 1.1.5 silent board in my Pro and I think that one does come with a bootloader (whatever that is!).

 


A bootloader is basically a bit of software code that’s saved to the control board memory that loads up every time you power up, without this the printer will load up but does not have any code to be able to understand the request to update firmware via the USB.

 

So it’s very likely that needs to be installed for them to be able to update via USB, but like I say it’s something where you really want to follow a good step by step and only do it if your sure you can do it right.

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Posted · Cura not connecting to printer

I have the same problem with a Chinese clone of Prusa i3 printer. I plug in my USB cable from my computer but Cura says the printer is not connected! I've tried it before warming up the printer and after. No difference! I've also tried clicking on Market place but saw nowhere to enable/install USB! I suppose I'm doing something stupid but what? Did you solve your problem - how?

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Posted · Cura not connecting to printer

I don't recommend Cura for USB stuff.  What are you trying to do?  Print through USB?  Doesn't that printer have an SD card slot?  It's much more reliable to use the SD card for printing.  But if you must, then use prontrface/printrun instead and let us know your issues.

 

usb debugging: 

 

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Posted · Cura not connecting to printer

I was trying to update the firmware. I purchased a new motherboard with a boot loader and everything is working great until I try to connect the computer to upgrade it.

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Posted · Cura not connecting to printer

Did you follow the instructions in the link then?  PC or MAC?  do you get the 2 tones mentioned in the link?  What com port number does it show up as (latest cura *seems* to have trouble with com ports > 10 or so?  Not sure).

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Posted · Cura not connecting to printer

I get a sound when I connect to the computer (a PC) and the COM port was 7 - so <10. Any help?

I have decided to give up! I've got a SD card and so I'll try with that. Do I save Cura  .stl and .gcode files to it then wait for the printer to do the necessary, or what? I suppose I must use the LCD to control it

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Posted · Cura not connecting to printer

The SD card only needs the Gcode files.

Limit the number of Gcode files on the SD card or the printer processor will slow down quite a bit when accessing the card.

The printer uses DOS 8.3 file names internally.  Really long file names can cause problems and the files may not show up on the LCD display.

Print using the LCD "Print from TF" command.

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Posted · Cura not connecting to printer

Thanks for your confirmation of my belief! I have succeeded in printing the Ultimaker robot but the qualiy leaves much to be desired! Watching the LCD whilst printing I noticed that my temperature settings seem to have been ignored! Are the settings used in the gcode file used? How can I change them? I think they may be too high.

 

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Posted · Cura not connecting to printer

Cura has like 5 temperatures.  Did you check them all?  There's a great search feature just above profile settings.  When you enter a search term it shows even hidden settings.

 

what kind of printer do you have?  UM2 series printers set the temperature on the printer, not in cura.  The machine type in cura settings is "ultigcode" and shouldn't be set to ultigcode for other printer types.

 

COM7 should have worked but Cura just isn't great at USB printing - I'd try prontrface/printrun which is free and fantastic.

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Posted · Cura not connecting to printer

I'm trying to start so I've bought a cheap Chinese version of a Prusa i3 printer. I have been unable to connect it by USB because the computer doesn't 'see' the printer. I've tried all the USB ports available and they are all serial ports below 10. In desperation I bought an SD card and this works but the resulting prints are terrible. I have been trying to write simple gcode to print test squares but haven't been able to discover how to do this either! So, I'm not making much progress!

I'll try the slicer you suggest to seen whether I can get any further. Thanks!

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Posted · Cura not connecting to printer

Prusa has their own slicer.  I'd stick with that.  It's really quite good and has some features that Cura doesn't.  I think they did a good job of the default settings.  Ultimaker seems to have fallen into a trap where they are afraid to change the existing profiles because people expect them to never change.  I understand this sentiment.  Prusa will probably fall into the same trap.  This means that there are new tricks to get better results but they are all turned off by default.

 

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Posted · Cura not connecting to printer
14 hours ago, gr5 said:

Ultimaker seems to have fallen into a trap where they are afraid to change the existing profiles because people expect them to never change.

😕

 

Ultimaker never changes existing profiles for 3rd party slicers. It is up to printer makers or the community to provide profiles for those printers. Also, you should have seen the backlash when the profiles for the Creality printers were changed to a set of popular profiles contributed by a community member...

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Posted · Cura not connecting to printer
15 hours ago, gr5 said:

Prusa has their own slicer.  I'd stick with that.  It's really quite good and has some features that Cura doesn't.  I think they did a good job of the default settings.  Ultimaker seems to have fallen into a trap where they are afraid to change the existing profiles because people expect them to never change.  I understand this sentiment.  Prusa will probably fall into the same trap.  This means that there are new tricks to get better results but they are all turned off by default.

 

The printer is actually a Chinese clone ! I,m just starting out and was looking for a cheap entry point. Still, I,ll have a look to see if it works. Cura comes with the printer's CD.

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Posted · Cura not connecting to printer

It looks like I've replied in the wrong spot!

My problem is that the computer doesn't see the printer so I'm not sure a different slicer will change things. Still, I,ll give it a try.

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