I was just able to recover a print that was 44 hours in and had a nozzle jam. I measured the print height, went into the G code of the print, and found what layer was at that height. I deleted everything previous to that layer and added a little bit of code before it:
G28 X Y (to home the X and Y Axis only)
G1 X0.0 Y0.0 Z140 (move two mm above the layer I wanted to start on)
I copied the first coordinate out of the layer I wanted to start on, and added two mm to the Z axis so it would move into place while staying above the print.
G1 X84.050 Y47.834 Z140
Then I left the rest of the code as-is. I set the nozzle and bed temperatures manually, and started the code I had modified. It did exactly what I wanted! I ran the first layer 5 degrees hotter and at 10% speed to try and remelt some of the previously left print. After the first layer, I turned on the part cooling fan, turned the nozzle back down 5 degrees, and ramped it back to 100% speed! Seems to be running like a champ! I’m glad I have that flexibility with this printer.
Nice save! And nice looking print so far.
Obviously the picture is of the state you found it in after printing air for some time. Do you have a picture of the saved file continuing to print?
Nice save! 44 hours 3/4 in? That’s mad 
What was the total print time and layer height?
I /never/ had a nozzle jam with the old Printrbot hotend or a J-Head. I suppose it’s something to “look forward to” when I start using an all-metal hotend… 
That’s pretty amazing. I’m curious to see the final quality of the product.
@Kevin_Danger_Powers after a few layers, it does look like I could have squished the nozzle into the print a little further, but I was worried about knocking the print off the bed by going too deep in. Overall, I think it’s a win. I’ll post pictures of the seam when it’s finished.
@Kevin_Danger_Powers this is after going for another 8 hours you can see the seam, but it’s really not horrible. In fact, in some parts of the print it’s barely noticeable from the normal printing lines.
missing/deleted image from Google+
missing/deleted image from Google+
Commenting for updates. I want to see how this turns out.
@Jeff_Parish I only made one copy of the modification, and it’s currently in the printer…You’ll have to wait till it’s done. 
But I will post it. 
@Petr_Sedlacek total print time will probably be around 72 hours. It’s a .4mm nozzle and I’m doing 0.1mm layer height. It’s currently still running. I’ll keep you updated.
@Greg_Dimas I’m using a ReliaBuild3D RB2 (Formally Rigidbot). The new owner (@Heath_Harper ) has made a lot of improvements to the original design. They have a lot of advancements in the electronics, stability, and user interface (and it’s been a dream compared to my original Prusa i3). Feel free to check it out at http://www.Reliabuild3D.com. If you want to get one, let me know. I have a code that can get you $150 off on certain sets. http://www.Reliabuild3D.com
ye dude I did the same, I had to remove the part of the script that says to home the head while mozing z plate, I programed it to moze z to the bottom first then zero the head then move z to the position then resume layers. Somthing to be aware of to not knock off the print or bump the head into it 
*remove priming script too
missing/deleted image from Google+
