Holy blob batman

[masskaos]

Hello, I changed one too many things this weekend and can't figure out what. I've got my new Rostock Max v2 working and calibrated using mattercontrol. I'm in the learning to print better 20mm-boxes phase and was giving repetier a whirl to see what that software package had to offer. As expected the initial print needed work, so into the design of experiments I went. However, somewhere around the sixth iteration on the printing of the box I start getting this blob at the very end of the top layer-

It squirts out rapidly at the very end of printing the top layer and before the carriage moves to home at the end of printing. If I load the same STL and print from mattercontrol, then no blob. So, anyone have a clue on what bell or whistle I switched on by accident in repetier? I'm new to G-code but it appears to me that the code following the final top layer move is a retraction of the extruder not an expelling.

Here are the last few lines in the G-code-
G1 X-8.563 Y8.766 E55.64253
G1 E54.89253 F2400.00000
G92 E0
M104 S0 ; turn off temperature
G28 X0 ; home X axis
M84 ; disable motors

The full file is also attached.

Any help on the matter would be much appreciated.

[mhackney]

Did this happen more than once? Can you post the gcode to the same part that doesn't create this blob? Nothing jumps out at me from the gcode and I can't imagine what would cause that unless you clicked the extrude button but even then I don't think it would blob like that.

[masskaos]

Hello,
It happens every time with the configuration I set up yesterday and tweaked today. Here is the g-code for the same STL run through mattercontrol.
I'm just starting over with a new configuration in repetier. I'm sure it will print fine. I just don't know what I did to create the blob...feature.

[mhackney]

I don't see anything out of the ordinary. If this is consistent, it's an odd one to me.

[masskaos]

New configuration file fixed whatever got corrupted. Blobs all gone. Back to printing little black squares.

Side question: The 20x10mm squares are coming out 19.7mm square x 10.2mm. Is there a dimensional scaling factor in the slicer software or Firmware that I missed?

Thank you,
Patrick

[Eaglezsoar]

New configuration file fixed whatever got corrupted. Blobs all gone. Back to printing little black squares.

Side question: The 20x10mm squares are coming out 19.7mm square x 10.2mm. Is there a dimensional scaling factor in the slicer software or Firmware that I missed?

Thank you,
Patrick

Patrick, put the following text into your browser's search bar and it will search for all incidences of scaling factor on this forum. It is quite extensive. Google search seems to work the best.

site:forum.seemecnc.com scaling factor