So I can get absolute extrusion to work with my printer maybe absolute isn't

Controllers Smoothie
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1

So I can get absolute extrusion to work with my printer maybe absolute isn’t made for my printer.

so I think I might try relative extrusion. never tried relative extrusion.

if anyone has any thoughts on relative gcode. please help me

like start gcode for a build area of 280mm x 270mm x 230mm

thanks

2

Relative extrusion causes your printer to push the wrong amount of plastic due to accumulation of floating point error.

Absolute extrusion averages errors to zero between consecutive moves, but requires the gcode generator to periodically emit G92 E0 to keep the floating point value within it’s high precision range.

Stick with absolute, there’s no good reason to bother with relative. Relative is only supported because some gcode generators are stupid.

3

@Triffid_Hunter absolute doesn’t work with my printer. Cura,slic3r keeps putting at G92 E0 in the middle of the gcode leaving me with a failed print every time. When it gets to the middle of the print it retracts the filament for a bought 2 minutes making the filament come out of the extruder.

4

Then you’ve done something wrong, almost everyone using smoothie for 3d printing is using absolute mode and you’re the only one reporting this issue.

I’ve personally never even tried relative mode and I used slic3r exclusively with no problems and many, many beautiful prints.

5

@jacob_keller there is something else wrong. G92 E0 should just reset the counter but not make any movement.

6

@Triffid_Hunter @Hakan_Evirgen this is what it looks like where the extruder retracts the filament. Tried this print many times with different slicer’s.

G1 F1200 X147.880 Y112.334 E10044.40612
G0 F4800 X145.559 Y111.618
G1 F1200 X144.699 Y110.758 E10044.47196
G1 F150000 E10043.47196
G1 Z30.100
G0 F4800 X126.462 Y115.148
G1 Z29.100
G1 F150000 E10044.47196
G92 E0
G1 F1200 X125.996 Y114.682 E0.03568
G0 F4800 X120.927 Y120.683
G0 X118.818 Y124.100
G0 X116.418 Y127.731
G1 F1200 X116.946 Y128.259 E0.07610
G0 F4800 X116.159 Y134.460
G0 X116.551 Y139.336
G0 X117.316 Y142.898
G1 F1200 X116.792 Y143.422 E0.11621

7

This code looks ok for me. I think that there is something wrong with your printer or its settings. Check also firmware. Which firmware are you using anyway?

8

@Hakan_Evirgen The latest version of smoothie firmware. What could it be in the slicer or the firmware?

9

Can you please check on your sd card if there are other files except for the config file? There may be a file which puts additional config parameters. Remove all but the config file.

10

I’ll check. And I’ll make a new configuration file

11

@Hakan_Evirgen I checked my SD card and there’s the configuration file and the firmware file

12

That is really strange. Does it do this also when you manually extrude 20cm, then issue g92 e0 and then extrude 5 cm more?

13

@Hakan_Evirgen ​
Only when I print

14

@Hakan_Evirgen here’s a link to my config file. im not sure what im looking for. maybe someone on here can.

thanks
https://www.dropbox.com/s/aqh30bd349ok2hg/config?dl=0

15

I see nothing out of the ordinary. Maybe something in your slicer configuration…

16

@Hakan_Evirgen made a new configuration file. Testing the printer with a test file. Will see in an hour.

17

@Hakan_Evirgen looks like it’s working. Will see tomorrow when I print something bigger.

18

@Hakan_Evirgen new configuration file. After 5 hours a Successful print. No big retracts and everything is working. Thanks for the troubleshooting.