I've got an Ultimarker 2+ with a Bondtech DDG feeder. It is working like a charm when I print using the SD card but that is boring. I've installed octoprint without problems and connected it to the UM2+. So far so good. The problem comes when I print.
What is the problem?
The Bondtech feeder requires a special firmware to print, which just modifies two parameters of the printer. From their manual (https://support.bondtech.se/Guide/01.+DDG+For+Ultimaker+2++and+3/16?lang=en) :
" The following is changed when compared to the original:
E-step is now 311 and Loading speed is 50 mm/sec"
If those changes are not done, the feeder creates too much force on the filament, until it slides with a big worrying noise. I can see visually that the amount of plastic coming out the nozzle is too much.
What did you already try to solve it?
I've set up this initial gcode script:
M109 S210 M109 S210 ; Extruder temperature
M190 S60 ;Bed temperature
M92 E311 ; Set sep * may be wrong *
M203 X50.00 Y50.00 Z40.00 E45.00 ; My try with loading speed * may be wrong *
G28 ; home all axes
G1 X5 Y10 F3000 ; bring extruder to front
G92 E0 ; zero the extruded length
G1 Z10 ; lower
G1 E19 F200 ; purge nozzle quickly
G1 E26 F60 ; purge nozzle slowly
G92 E0 ; zero the extruded length again
G1 E-5.5 F400 ; retract
G1 X190 Z0 F9000 ; pull away filament
G1 X210 F9000 ; wipe
G1 Y20 F9000 ; wipe
G1 E0 ; feed filament back
This is latest octoprint, 2019-09-26-octopi-buster-lite-0.17.0.img and the ultimaker tuned with the custom firmware from bondtech.
I think I should be able to solve it with a proper gcode init script. Any help will be much appreciated.