[CURA 15 on Leapfrog Creatr]

This is maybe an old topic, but I want tot share my settings for if someone strumbles on this page.

 

Steps taken

1. Generate Gcode by Cura with starting and end gcode presented below

2. Open Notepad++ and remove all code (I leave the comments) that Cura creates before my comment ; My edit. This enables heating the print bed and nozzle simultaneous.

3. Execute Gcode on Leapfrog.

 

Cura printer profile settings

I created a new printer setting called Leapfrog and used the following settings.

[media=68396" size="medium][/media]

 

Gcode

Starting Gcode

; My edit

M117 Heating... ;Put heating msg on screen

M140 S60 ;Heat bed, do not wait

M109 S210 T0 ;Uncomment to add your own temperature line

M190 S60 ;Heat bed, wait till done

G21 ;metric values

G90 ;absolute positioning

M82 ;set extruder to absolute mode

T0 ;T0 is right extruder, T1 is left extruder

M107 ;start with the fan off

G28 X0 Y0 ;move X/Y to min endstops

G28 Z0 ;move Z to min endstops

G1 Z30.0 F6000 ;move the platform down 30mm

G92 E0 ;zero the extruded length

G1 F200 E30 ;extrude some feed stock

G92 E0 ;zero the extruded length again

G1 F6000

End Gcode

M104 S0 ;extruder heater off

M140 S0 ;heated bed heater off (if you have it)

G91 ;relative positioning

G1 E-1 F300 ;retract the filament a bit before lifting the nozzle, to release some of the pressure

G1 Z+0.5 E-5 X-20 Y-20 F6000 ;move Z up a bit and retract filament even more

G28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way

G1 Z180 F300 ; lower platform

M84 ;steppers off

G90 ;absolute positioning

 

Other GCode

This Gcode uses the variables from Cura, however it is written for old Cura version, so you have to tweak it before it will work.

;Sliced at: {day} {date} {time}

;Basic settings: Layer height: {layer_height} Walls: {wall_thickness} Fill: {fill_density}

;Print time: {print_time}

;Filament used: {filament_amount}m {filament_weight}g

;Filament cost: {filament_cost}

M190 S{print_bed_temperature} ;Uncomment to add your own bed temperature line

M109 S{print_temperature} T0 ;Uncomment to add your own temperature line

G21 ;metric values

G90 ;absolute positioning

M82 ;set extruder to absolute mode

T0 ;use first extruder

M107 ;start with the fan off

G28 X0 Y0 ;move X/Y to min endstops

G28 Z0 ;move Z to min endstops

G1 Z30.0 F{travel_speed} ;move the platform down 30mm

G92 E0 ;zero the extruded length

G1 F200 E30 ;extrude some feed stock

G92 E0 ;zero the extruded length again

G1 F{travel_speed}

;End GCode

M104 S0 ;extruder heater off

M140 S0 ;heated bed heater off (if you have it)

G91 ;relative positioning

G1 E-1 F300 ;retract the filament a bit before lifting the nozzle, to release some of the pressure

G1 Z+0.5 E-5 X-20 Y-20 F{travel_speed} ;move Z up a bit and retract filament even more

G28 X0 Y0 ;move X/Y to min endstops, so the head is out of the way

G1 Z180 F300 ; lower platform

M84 ;steppers off

G90 ;absolute positioning

;{profile_string}

[Drift and Under Extrusion with UM2]

Thanks you for the response.

This solves the drift, but is under extrusion also common with this problem, or might this be a temperature / speed problem?

As you can see my speed is not that high, temp. is 210 C and using green Makerpoint

PLA for 180-210 C

[Drift and Under Extrusion with UM2]

Hello community,

I got drift and under extrusion with the UM2 . The drift started yesterday and started with larger parts, but now also with smaller parts (sizes of 1/3 of the print bed).

I just noticed the under extrusion and created a test file (test_square) to see the drifting and under extrusion. The pictures say enough. I got drift in both X and Y. I search the forum for drift and placed marks on the pulleys to see if they slip. However this did not occur. I did not extra tighten the pulleys, maybe I'm going to do that just for sake of completeness.

Another point is lubrication, unfortunately I cannot test it now since I do not have lubrication at hand.

Furthermore, the filament is sometimes retracted a lit bit, rotating the feeder actuator. I think that's because the filament roll is getting smaller, so the feeder requires more torque to overcome the friction force of the filament roll. No slip occurs, the feeder is just rotated backwards. Have anyone seen this before?

I hope it is a bit clear what my problems are and that the pictures are sufficient enough. Just request for more information if it is not the case.

- Michael

To reduce the size of the post, I placed the images into an album, only have no clue how to include an album in here or refer to it by URL. So all the images are included in the post.

Edit: A video of another design where the drift occurs around 0:26. You can hear it jamming.