firmware bug with E3D UM2 extrusion upgrade

[lance-greene 7]

Hi I encountered a bug when performing the E3D extrusion mod to my UM2.

after getting everything installed and doing all the firmware changes, i noticed that now the retraction settings in the printer cap the retraction speed at 20mm/s. even though it automatically sets it to 25 mm/s. if i click and enter the function to change it in the printer, it automatically drops it to 20mm/s and prevents me from setting it any higher.

just wondering where in the firmware i can find that setting so i can change it?

[Labern 775]

This is the change that E3D put in the firmware. The 20 is for the extruder (x,y,z,e). Should be in the configuration.h file

DEFAULT_MAX_FEEDRATE {300, 300, 40, 20} // (mm/sec)

[lance-greene 7]

so i changed that value to 60 and uploaded the firmware directly from the arduino IDE and nothing changed, it is still capped at 20. I could not find any other value in the configuration.h file that could possibly change this

[Labern 775]

That's the only change they made regarding this. Did you do a factory reset after the change you made?

[lance-greene 7]

no i uploaded the firmware, the printer restarted, then i went and checked the retraction settings and they hadnt changed

[Labern 775]

Some changes only take effect after factory reset. So I would try that first.