DaVinci Junior cartridge reset (Page 41 of 58)

Thank you .. but next thing to do is find the way to downgrade the firmware

@fargle2nd - have you managed to downgrade???! On which firmware were you on?! If v2.2.7 and up PLEASE let us know how you've managed to do that.

About the filament etc - I've cut 10mm of PTFE tube and secured it in with 2x small strips of masking tape, also on thingiverse you can find Jr filament holder which simply hooks to the side.

Does anyone have a list of the sites to block that xyz use for updates - I have blocked the program in the firewall but I wanted to double check?

I'm still on version 1.0.5 - are there any major benefits moving up to 2.2.4?

I'm stuck on FW 2.2.8 as its just auto-upgraded before I read about not doing so from 2.2.6 -_-

Does anyone know if its possible to get blank chips that could be written instead of hacking the original ones as a way to have something valid in the machine for different PLA. I've been sent a reel without a chip, so am looking at getting it replaced, but it dawned on me that if we could somehow write fresh chips, it would resolve some of the problems?

Thanks, Simon

@Bozotclown1970 - You can buy those NFC stickers, Mifare Ultralight if I remember that right and clone existing one to it via Arduino NFC. This method worked for me on v2.2.4 but I'm clueless if Jr will treat them as new NFC chips. Definately worth giving it a go.

kr15_uk, thanks for the post, I also have some of those stickers but have not been able to get the printer to recognize them due to missing the pack information. Were you able to clone the tag completely? If so, this is the piece I am missing.

Also the paper tags already have an ID on them. So a 100% clone would not be possible as the ID cannot be written over.

Any info on cloning the tag would be greatly appreciated.

@Bozotclown1970 - To he honest this was one of those projects which I did in "copy -> paste" style from some forum post/instructable/blog article - can't recollect that, sorry.
But I can confirm that after cloning I was able to check spool info from Jr LCD (colour info etc...)
I did had a look if I bookmarked anything - nope, and history goes back only 7days...
But I'll check my studio computer tonight to see if I have any software downloads still in my downloads folder, that might help to remember or so.

Actually I should have that roll somewhere still. + I'll check my draw with protoboards, maybe kit is still alive.

Anyway, I've set a reminder for tonight.

Well, I had not luck on Google on how to clone a tag. I have two paper tags here one with a PACK code I entered frorm one of my XYZ tags and one with no PACK code at all. Both return "Unidentified Spool" when I put them in my printer. Not sure where to go from here.

Unless I missed something, no one has been able to calculate the PACK code for tag id's. As I mentioned in a previous post. I have added a pack code from an XYZ tag, but my tag is "Unidentified" by my printer. I am not sure, but I have a feeling the Tag ID used used in some way to calculate the PACK code. If I am wrong, please let me know.

As it stands right now. I have three XYZ Tags that I can update and use as long as I need to.

On an NFC tag in general the tag UID comes frozen onto the card from the factory.  We think that the Key or Password uses the UID and runs it through some algorithm to get the Key.  You can put a new blank NTAG213 into the printer and the printer will read the UID and pass back a Key.  Once the NFC tag accepts the key from the printer the printer reads the locked portions of the tag.  It appears the first thing the printer does is read the information and look at the PACK on the tag.  I'm guessing again there is another algorithm using the UID and/or key to generate the PACK.  When it doesn't like the PACK the partner just gives an error and rejects the tag as not valid. 

There are special "Magic" NFC tags that you can write any UID to that blank tag.  They are typically expensive and as of my last research a few months ago no one produces a "Magic" or UID rewritable NTAG213.  There are other types and brands, but not the one's used by the junior.  If one of those were to be found you could take the data on line from someone else -UID, Password and Pack - then use the known base information pasted in the forum to make a working tag. 

The issue with a typical blank tag is that the UID is locked in from the factory, so you could insert the tag and record the password that the junior uses to try to unlock it.  Use that key to create a tag with authentic UID, key and information about temp, length, color ect.  But the issue is this tag would get rejected because the first check the printer would make is to see if the PACK was correct and since the UID of the tag is different then anything else there would be no one to copy it off of and since the printer checks it internally there is no way to get the info from the printer like you could the key/password. 

Typical blank tags would be possible if someone could figure out the PACK.  If we could figure out the pack is an algorithm based on the UID or other system then we could make blank tags work by getting the Key from the printer and using the algorithm to get the pack and just putting the color, length and other data into the other blank spaces. 

So the requirement would be someone figuring out how the PACK is made, then we can create our own blank tags and make as many as we want and would not need to reset the length for the same UID tag, we could just move to the next blank tag.  No more resetting just creating our own blank tags.

Thank you so much for putting that much effort into trying to remember/find that information. From what you wrote you were where I am now, trying to create working paper tags.

What I have been reading on the internet. The Pack code is automatically sent after the tag is authenticated. I have not found a library anywhere that will allow me to read it yet. I do have another piece of software I can use, but I want to be able to read/write the Pack code from my own program I have written to update tags with. That is the only piece I am currently missing.

Thank you again.

tobias.friberg,

Have you checked with kr15_uk to see if his board is available? I think this is going to be your only choice, other than performing a conversion on your printer.