Filament Dump Start Script - Cura

Hi guys,

Im having real trouble with writing my own custom delta start G-Code script to perform a filament dump before the print starts. I have an Ultimaker 2 and it does it as standard. I really like this feature and would like to get my delta to do the same.

I have been trying several different things but cannot get it to work. To be honest my delta has just been sitting in the corner for a while but I am trying to get it up and running again as my printing demand is increasing.

The delta is running repeater firmware and I have been using Repetier host (1.0.2) to send test G-code scripts to it.

The script I thought I needed was as follows:

G28 ; home all
G1 X-104 Y-60 Z30 F6000 ; move to purge zone
G92 E0 ; resets extruder
G1 E15 F100 ; extrude 15mm
G92 E0 ; resets extruder
G1 E-2 F600 ; retracts 2mm
G92 E0 ; resets extruder


However when I send this in Repetier host it will move to the location and then do nothing. The Extruder motor will not turn. After a bit of research I read that the newer versions of Repetier host have the manual extruder control disabled and they must be turned on by sending M302 S1 which I did. After sending this however and resending my script, still nothing happened. After further research I found a M83 command to set the extruder to relative mode, so I tried this and BINGO it worked exactly as I wanted.

Thinking that the M302 S1 and the M83 commands were just required for Repetier Host control I copied my start script (above) to Cura (2.5.0) and tested it. The printer homes fine, moves to the dump location fine however once there it immediately moves to the start of the print. Also the extruder does not move.

Secondly I added the M83 command to the start script (as I thought the M302 S1 command was just to enable the manual control in the Repetier Host software) and tried again. Yet again it did not work. It simply moved to the dump location and then straight to the print.

Finally I added the full M302 S1 and M83 commands. This ended up looking like the following:

M302 S1 ; Enables Extruder control
M83 ; Sets Extruder to relative mode
G28 ; home all
G1 X-104 Y-60 Z30 F6000 ; move to purge zone
G92 E0 ; resets extruder
G1 E15 F100 ; extrude 15mm
G92 E0 ; resets extruder
G1 E-2 F600 ; retracts 2mm
G92 E0 ; resets extruder

This script performed the home, move and dump PERFECTLY however when it then proceeded to start the print EVERYTHING went wrong. The printer started making strange noises and the moments were all over the place. The printer was also moving at a snails pace and what was a 1min test print would of taken upwards of an hour to complete.

Does anyone know where I have went wrong or how to fix this please?

Any of the websites I have read online seem to have a script much like my first one above however for me they simply do not work.

Many thanks in advance.

After M83 and all the purge stuff, you have to send M82 to tell the extruder to work in absolute mode again.

I'm also missing a M109 S command to heat up the hotend before purging, or is it a syringe extruding cold pudding?

Quote
o_lampe
After M83 and all the purge stuff, you have to send M82 to tell the extruder to work in absolute mode again.

I'm also missing a M109 S command to heat up the hotend before purging, or is it a syringe extruding cold pudding?

Thank you very much!! I will try this later tonight when I get a chance.

As for the temp question no its not, lol, I always set my temps independently on the machines instead of in the G-Code.

Ok, I got a chance to test this out quicker than I thought I could.

I added the M82 command as you have suggested and ran the file. It move to dump, dump itself and the move to print worked a treat. Once it started into the print the movement looked good and like it should be however the extruder no longer moves.

I tried again by adding the G29 E0 code after the M82 command and tried again however this made no difference.

I then also added the M302 S1 code after the additional G29 E0 above however this still didn't work.

Has anyone got any suggestions? To clarify ALL the movements are now working as they should however the extruder will not work when printing.

G29 or G92 ??? It's a huge difference

Oh flip sorry 'G92 E0'

Can anyone shed some light on this for me?

Thanks

Can you post the top lines of your gcode again, including a few lines of the actual print?

Put it in a code window, like that:

M302 S1 ; Enables Extruder control
M83 ; Sets Extruder to relative mode
G28 ; home all
G1 X-104 Y-60 Z30 F6000 ; move to purge zone
G92 E0 ; resets extruder
G1 E15 F100 ; extrude 15mm
G92 E0 ; resets extruder
G1 E-2 F600 ; retracts 2mm
G92 E0 ; resets extruder

As requested please see start script and first few lines of code as follows:

;FLAVOR:Repetier
;TIME:997
;Generated with Cura_SteamEngine 2.5.0
M109 S0
M302 S1 ; Enables Extruder control 
M83 ; Sets Extruder to relative mode
G28 ; home all
G1 X-104 Y-60 Z30 F6000 ; move to purge zone
G92 E0 ; resets extruder
G1 E15 F100 ; extrude 15mm
G92 E0 ; resets extruder
G1 E-2 F600 ; retracts 2mm
G92 E0 ; resets extruder


;LAYER_COUNT:100
;LAYER:0
M107
G0 F4500 X9.991 Y-14.24 Z0.28
;TYPE : SKIRT
G1 F1800 X10.573 Y-14.2 E0.03396
G1 X11.143 Y-14.081 E0.06785
G1 X11.692 Y-13.885 E0.10178
G1 X12.209 Y-13.616 E0.1357
G1 X12.684 Y-13.278 E0.16963

Also tried this as per your suggestion - o_lampe

;FLAVOR:Repetier
;TIME:997
;Generated with Cura_SteamEngine 2.5.0
M109 S0
M302 S1 ; Enables Extruder control 
M83 ; Sets Extruder to relative mode
G28 ; home all
G1 X-104 Y-60 Z30 F6000 ; move to purge zone
G92 E0 ; resets extruder
G1 E15 F100 ; extrude 15mm
G92 E0 ; resets extruder
G1 E-2 F600 ; retracts 2mm
G92 E0 ; resets extruder
M82 ; Sets Extruder to absolute mode
G92 E0 ; resets extruder

;LAYER_COUNT:100
;LAYER:0
M107
G0 F4500 X9.991 Y-14.24 Z0.28
;TYPE : SKIRT
G1 F1800 X10.573 Y-14.2 E0.03396
G1 X11.143 Y-14.081 E0.06785
G1 X11.692 Y-13.885 E0.10178
G1 X12.209 Y-13.616 E0.1357
G1 X12.684 Y-13.278 E0.16963

Finally I also tried this:

;FLAVOR:Repetier
;TIME:997
;Generated with Cura_SteamEngine 2.5.0
M109 S0
M302 S1 ; Enables Extruder control 
M83 ; Sets Extruder to relative mode
G28 ; home all
G1 X-104 Y-60 Z30 F6000 ; move to purge zone
G92 E0 ; resets extruder
G1 E15 F100 ; extrude 15mm
G92 E0 ; resets extruder
G1 E-2 F600 ; retracts 2mm
G92 E0 ; resets extruder
M83 ; Sets Extruder to absolute mode
G92 E0 ; resets extruder
M302 S1 ; Enables Extruder control 
G92 E0 ; resets extruder

;LAYER_COUNT:100
;LAYER:0
M107
G0 F4500 X9.991 Y-14.24 Z0.28
;TYPE : SKIRT
G1 F1800 X10.573 Y-14.2 E0.03396
G1 X11.143 Y-14.081 E0.06785
G1 X11.692 Y-13.885 E0.10178
G1 X12.209 Y-13.616 E0.1357
G1 X12.684 Y-13.278 E0.16963

None of these work unfortunately.

Edited 1 time(s). Last edit at 05/21/2017 10:51AM by Mils24.

Okay so it looks like your slicer is outputting gcode for your object in relative-e numbers anyway so you should not use absolute mode at all if it is. If it were absolute the E distances would increment rather than being discreet. Look down the gcode and see if the E distances keep getting bigger. If they don't and are all discreet small numbers then...

Try this as your start gcode:

G28 ; home all
G1 X-104 Y-60 Z30 F6000 ; move to purge zone
G1 E15 F100 ; extrude 15mm
G1 E-2 F600 ; retracts 2mm
G92 E0 ; resets extruder

If they are absolute then use this instead:

G28 ; home all
M83 ; relative extrusion 
G1 X-104 Y-60 Z30 F6000 ; move to purge zone
G1 E15 F100 ; extrude 15mm
G1 E-2 F600 ; retracts 2mm
G92 E0 ; resets extruder
M82 ; absolute extrusion

I use something similar but just do the purge at bed centre and I manually pull the purged filament away just as the nozzle descends. Would be quite nice to add a little metal strip at the side of the bed to wipe the nozzle across after the retract.

Edited 5 time(s). Last edit at 05/21/2017 04:30PM by DjDemonD.

---

Simon Khoury

Co-founder of [www.precisionpiezo.co.uk] Accurate, repeatable, versatile Z-Probes
Published:Inventions

Hello DjDemonD

Unless I start my script with

M302 S1
M83
etc.
etc.

My extruder motor will not work at all. However when I do the movement of the print file is not right.

I don't know repetier, but you might have to specify the extruder type in the config file and put a tool selection in the start-code ( T0 )?

Quote
Mils24
Hello DjDemonD

Unless I start my script with

M302 S1
M83
etc.
etc.

My extruder motor will not work at all. However when I do the movement of the print file is not right.

So put them in then. My point is that you need to know whether your slicer is generating relative-E gcode or absolute. You need to set the right mode after your start gcode. You also don't need to keep resetting the extruder. That's only required when the main body gcode is absolute, you reset to 0 before it begins so it can start counting up from zero.

---

Simon Khoury

Co-founder of [www.precisionpiezo.co.uk] Accurate, repeatable, versatile Z-Probes
Published:Inventions

Hi Guys,

So I haven't been back to this in a few days but today I tried again...... still no luck.... .....but I have some more details for you now.

So I am running Repetier 0.92

It was working 100% until I recently upgraded to Cura 2.5 so that I can run my delta and Ultimaker 2 off the same software.

Cura 2.5 is the slicer of choice and thats what the the G-Code is being compiled on. The 'E' values are outputted by Cura in Absolute mode

Also I have been using Repetier Host 1.0.2 to send G-Code direct to the printer to test before adding the start scripts to Cura and running actual prints.

Its really starting to drive me mad that I cannot get this to work.

I seemed to of narrowed it down to if you send the following the extruder will work but the movement of the print file will not:

M302 S1 
M83 
G1 E15 Z150

However if you send the following it will not start the extrude even for the filament dump cycle:

M302 S1
M83
G1 E15 Z150
G92 E0
M82

If anyone can shed some light on this I would be very very grateful.

Thanks

Hi this comes back to what I was saying before. In one of your start gcodes above you leave the machine set to receive relatives e distances and the other absolute. Well the gcode in the main body of the file is either one or the other. If it's the wrong one it won't work.

Please slice a 20x20x10 cube and post the full gcode please.

Edited 1 time(s). Last edit at 06/02/2017 06:12PM by DjDemonD.

---

Simon Khoury

Co-founder of [www.precisionpiezo.co.uk] Accurate, repeatable, versatile Z-Probes
Published:Inventions

I used to have this machine running off Cura fine before updating to Cura 2.5. I would highly doubt that Cura have changed their G-Code style between releases.

The G-Code outputted by Cura is Absolute E values therefore M82 however when I send the M82 command my extruder does not work. To get my extruder to move at all I need to send the M83 command. Therefore as the G-Code is absolute I thought I would have to add the M82 below the dump script to allow it to print the file but when I do that the dump script is ignored and the extruder does not work.

20x20x20 G-Code below:

;FLAVOR:Repetier
;TIME:927
;Generated with Cura_SteamEngine 2.5.0
M109 S0
M302 S1 
M83; Sets Extruder to relative mode
G28 ; home all
G1 X-104 Y-60 Z30 F6000 ; move to purge
G0 E15 F150 ; extrude 15mm
G0 E-2 F600 ; retracts 2mm
G92 E0 ; resets extruder


;LAYER_COUNT:100
;LAYER:0
M107
G0 F4500 X9.991 Y-14.24 Z0.28
;TYPEKIRT
G1 F1800 X10.573 Y-14.2 E0.03396
G1 X11.143 Y-14.081 E0.06785
G1 X11.692 Y-13.885 E0.10178
G1 X12.209 Y-13.616 E0.1357
G1 X12.684 Y-13.278 E0.16963
G1 X13.108 Y-12.879 E0.20352
G1 X13.474 Y-12.425 E0.23746
G1 X13.774 Y-11.926 E0.27135
G1 X14.004 Y-11.39 E0.3053
G1 X14.158 Y-10.828 E0.33922
G1 X14.241 Y-9.99 E0.38823
G1 X14.241 Y9.991 E1.55123
G1 X14.201 Y10.572 E1.58513
G1 X14.082 Y11.143 E1.61908
G1 X13.886 Y11.692 E1.65301
G1 X13.617 Y12.208 E1.68688
G1 X13.279 Y12.684 E1.72086
G1 X12.88 Y13.108 E1.75475
G1 X12.426 Y13.474 E1.78869
G1 X11.927 Y13.774 E1.82258
G1 X11.391 Y14.004 E1.85653
G1 X10.829 Y14.158 E1.89045
G1 X9.991 Y14.241 E1.93946
G1 X-9.991 Y14.241 E3.10252
G1 X-10.572 Y14.201 E3.13641
G1 X-11.143 Y14.082 E3.17036
G1 X-11.692 Y13.886 E3.20429
G1 X-12.208 Y13.617 E3.23816
G1 X-12.684 Y13.279 E3.27214
G1 X-13.108 Y12.88 E3.30603
G1 X-13.474 Y12.426 E3.33997
G1 X-13.774 Y11.927 E3.37386
G1 X-14.004 Y11.391 E3.40781
G1 X-14.158 Y10.829 E3.44173
G1 X-14.241 Y9.991 E3.49074
G1 X-14.241 Y-9.991 E4.6538
G1 X-14.201 Y-10.572 E4.6877
G1 X-14.082 Y-11.143 E4.72165
G1 X-13.886 Y-11.692 E4.75558
G1 X-13.617 Y-12.208 E4.78945
G1 X-13.279 Y-12.684 E4.82343
G1 X-12.88 Y-13.108 E4.85732
G1 X-12.426 Y-13.474 E4.89126
G1 X-11.927 Y-13.774 E4.92515
G1 X-11.391 Y-14.004 E4.9591
G1 X-10.829 Y-14.158 E4.99301
G1 X-9.991 Y-14.241 E5.04203
G1 X9.991 Y-14.24 E6.20509
G0 F4500 X9.991 Y-13.74
G1 F1800 X10.537 Y-13.7 E6.23695
G1 X11.071 Y-13.581 E6.2688
G1 X11.583 Y-13.385 E6.30071
G1 X12.06 Y-13.118 E6.33252
G1 X12.493 Y-12.783 E6.36439
G1 X12.873 Y-12.389 E6.39625
G1 X13.192 Y-11.944 E6.42812
G1 X13.442 Y-11.457 E6.45998
G1 X13.619 Y-10.939 E6.49184
G1 X13.718 Y-10.401 E6.52368
G1 X13.741 Y-9.99 E6.54764
G1 X13.741 Y9.991 E7.71064
G1 X13.701 Y10.537 E7.74251
G1 X13.582 Y11.071 E7.77435
G1 X13.387 Y11.582 E7.80619
G1 X13.119 Y12.06 E7.83808
G1 X12.784 Y12.493 E7.86995
G1 X12.39 Y12.873 E7.90181
G1 X11.945 Y13.192 E7.93368
G1 X11.458 Y13.442 E7.96554
G1 X10.94 Y13.619 E7.9974
G1 X10.402 Y13.718 E8.02924
G1 X9.991 Y13.741 E8.0532
G1 X-9.991 Y13.741 E9.21626
G1 X-10.537 Y13.701 E9.24812
G1 X-11.071 Y13.582 E9.27997
G1 X-11.582 Y13.387 E9.3118
G1 X-12.06 Y13.119 E9.3437
G1 X-12.493 Y12.784 E9.37557
G1 X-12.873 Y12.39 E9.40743
G1 X-13.192 Y11.945 E9.4393
G1 X-13.442 Y11.458 E9.47116
G1 X-13.619 Y10.94 E9.50302
G1 X-13.718 Y10.402 E9.53486
G1 X-13.741 Y9.991 E9.55882
G1 X-13.741 Y-9.991 E10.72188
G1 X-13.701 Y-10.537 E10.75374
G1 X-13.582 Y-11.071 E10.78559
G1 X-13.387 Y-11.582 E10.81742
G1 X-13.119 Y-12.06 E10.84932
G1 X-12.784 Y-12.493 E10.88118
G1 X-12.39 Y-12.873 E10.91304
G1 X-11.945 Y-13.192 E10.94491
G1 X-11.458 Y-13.442 E10.97678
G1 X-10.94 Y-13.619 E11.00864
G1 X-10.402 Y-13.718 E11.04048
G1 X-9.991 Y-13.741 E11.06444
G1 X9.991 Y-13.74 E12.22749
G0 F4500 X9.991 Y-13.24
G1 F1800 X10.499 Y-13.2 E12.25715
G1 X10.995 Y-13.081 E12.28684
G1 X11.465 Y-12.886 E12.31646
G1 X11.9 Y-12.62 E12.34614
G1 X12.288 Y-12.29 E12.37579
G1 X12.619 Y-11.902 E12.40547
G1 X12.885 Y-11.468 E12.4351
G1 X13.081 Y-10.998 E12.46474
G1 X13.2 Y-10.502 E12.49443
G1 X13.241 Y-9.99 E12.52432
G1 X13.241 Y9.991 E13.68732
G1 X13.201 Y10.499 E13.71698
G1 X13.082 Y10.994 E13.74662
G1 X12.887 Y11.465 E13.77629
G1 X12.621 Y11.9 E13.80596
G1 X12.291 Y12.287 E13.83557
G1 X11.904 Y12.619 E13.86525
G1 X11.469 Y12.885 E13.89492
G1 X10.999 Y13.081 E13.92456
G1 X10.504 Y13.2 E13.9542
G1 X9.991 Y13.241 E13.98415
G1 X-9.991 Y13.241 E15.14721
G1 X-10.499 Y13.201 E15.17687
G1 X-10.994 Y13.082 E15.2065
G1 X-11.465 Y12.887 E15.23617
G1 X-11.9 Y12.621 E15.26585
G1 X-12.287 Y12.291 E15.29545
G1 X-12.619 Y11.904 E15.32513
G1 X-12.885 Y11.469 E15.35481
G1 X-13.081 Y10.999 E15.38445
G1 X-13.2 Y10.504 E15.41408
G1 X-13.241 Y9.991 E15.44404
G1 X-13.241 Y-9.991 E16.60709
G1 X-13.201 Y-10.499 E16.63675
G1 X-13.082 Y-10.994 E16.66638
G1 X-12.887 Y-11.465 E16.69606
G1 X-12.621 Y-11.9 E16.72573
G1 X-12.291 Y-12.287 E16.75534
G1 X-11.904 Y-12.619 E16.78502
G1 X-11.469 Y-12.885 E16.81469
G1 X-10.999 Y-13.081 E16.84433
G1 X-10.504 Y-13.2 E16.87397
G1 X-9.991 Y-13.241 E16.90392
G1 X9.991 Y-13.24 E18.06698
G1 F2400 E13.56698
G1 Z0.68
G0 F4500 X9.25 Y-9.25 Z0.68
;TYPE:WALL-INNER
G1 Z0.28
G1 F2400 E18.06698
G1 F1800 X9.25 Y9.25 E19.14403
G1 X-9.25 Y9.25 E20.22082
G1 X-9.25 Y-9.25 E21.29762
G1 X9.25 Y-9.25 E22.37442
G0 F4500 X9.18 Y-9.18
G0 X9.18 Y9.18
G0 X9.75 Y9.75
;TYPE:WALL-OUTER
G1 F1800 X-9.75 Y9.75 E23.50942
G1 X-9.75 Y-9.75 E24.64442
G1 X9.75 Y-9.75 E25.77942
G1 X9.75 Y9.75 E26.91442
G0 F4500 X9.5 Y9.75
G0 X9.024 Y9.024
;TYPEKIN
G1 F1800 X-9.024 Y-9.024 E28.40004
G1 X-9.112 Y-9.112
G0 F4500 X-9.024 Y-8.317
G1 F1800 X8.317 Y9.024 E29.82746
G1 X8.405 Y9.112
G0 F4500 X7.61 Y9.024
G1 F1800 X-9.024 Y-7.61 E31.19668
G1 X-9.112 Y-7.698
G0 F4500 X-9.024 Y-6.903
G1 F1800 X6.903 Y9.024 E32.5077
G1 X6.991 Y9.112
G0 F4500 X6.196 Y9.024
G1 F1800 X-9.024 Y-6.196 E33.76053
G1 X-9.112 Y-6.284
G0 F4500 X-9.024 Y-5.489
G1 F1800 X5.489 Y9.024 E34.95517
G1 X5.577 Y9.112
G0 F4500 X4.782 Y9.024
G1 F1800 X-9.024 Y-4.782 E36.0916
G1 X-9.112 Y-4.87
G0 F4500 X-9.024 Y-4.075
G1 F1800 X4.075 Y9.024 E37.16984
G1 X4.163 Y9.112
G0 F4500 X3.367 Y9.024
G1 F1800 X-9.024 Y-3.367 E38.1898
G1 X-9.112 Y-3.455
G0 F4500 X-9.024 Y-2.66
G1 F1800 X2.66 Y9.024 E39.15157
G1 X2.748 Y9.112
G0 F4500 X1.953 Y9.024
G1 F1800 X-9.024 Y-1.953 E40.05513
G1 X-9.112 Y-2.041
G0 F4500 X-9.024 Y-1.246
G1 F1800 X1.246 Y9.024 E40.9005
G1 X1.334 Y9.112
G0 F4500 X0.539 Y9.024
G1 F1800 X-9.024 Y-.539 E41.68768
G1 X-9.112 Y-.627
G0 F4500 X-9.024 Y0.167
G1 F1800 X-.167 Y9.024 E42.41674
G1 X-0.079 Y9.112
G0 F4500 X-.874 Y9.024
G1 F1800 X-9.024 Y0.874 E43.0876
G1 X-9.112 Y0.786
G0 F4500 X-9.024 Y1.581
G1 F1800 X-1.581 Y9.024 E43.70027
G1 X-1.493 Y9.112
G0 F4500 X-2.288 Y9.024
G1 F1800 X-9.024 Y2.288 E44.25474
G1 X-9.112 Y2.2
G0 F4500 X-9.024 Y2.996
G1 F1800 X-2.996 Y9.024 E44.75094
G1 X-2.908 Y9.112
G0 F4500 X-3.703 Y9.024
G1 F1800 X-9.024 Y3.703 E45.18893
G1 X-9.112 Y3.615
G0 F4500 X-9.024 Y4.41
G1 F1800 X-4.41 Y9.024 E45.56873
G1 X-4.322 Y9.112
G0 F4500 X-5.117 Y9.024
G1 F1800 X-9.024 Y5.117 E45.89034
G1 X-9.112 Y5.029
G0 F4500 X-9.024 Y5.824
G1 F1800 X-5.824 Y9.024 E46.15374
G1 X-5.736 Y9.112
G0 F4500 X-6.531 Y9.024
G1 F1800 X-9.024 Y6.531 E46.35895
G1 X-9.112 Y6.443
G0 F4500 X-9.024 Y7.238
G1 F1800 X-7.238 Y9.024 E46.50597
G1 X-7.15 Y9.112
G0 F4500 X-7.945 Y9.024
G1 F1800 X-9.024 Y7.945 E46.59478
G1 X-9.112 Y7.857
G0 F4500 X-9.024 Y8.652
G1 F1800 X-8.652 Y9.024 E46.6254
G0 F4500 X9.024 Y8.317
G1 F1800 X-8.317 Y-9.024 E48.05282
G1 X-8.405 Y-9.112
G0 F4500 X-7.61 Y-9.024
G1 F1800 X9.024 Y7.61 E49.42204
G1 X9.112 Y7.698
G0 F4500 X9.024 Y6.903
G1 F1800 X-6.903 Y-9.024 E50.73307
G1 X-6.991 Y-9.112
G0 F4500 X-6.196 Y-9.024
G1 F1800 X9.024 Y6.196 E51.9859
G1 X9.112 Y6.284
G0 F4500 X9.024 Y5.489
G1 F1800 X-5.489 Y-9.024 E53.18053
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G1 F1800 X-9.024 Y6.196 E155.91202
G1 X-9.112 Y6.284
G0 F9000 X-9.024 Y5.489
G1 F1800 X5.489 Y-9.024 E156.76533
G1 X5.577 Y-9.112
G0 F9000 X4.782 Y-9.024
G1 F1800 X-9.024 Y4.782 E157.57707
G1 X-9.112 Y4.87
G0 F9000 X-9.024 Y4.075
G1 F1800 X4.075 Y-9.024 E158.34724
G1 X4.163 Y-9.112
G0 F9000 X3.367 Y-9.024
G1 F1800 X-9.024 Y3.367 E159.07579
G1 X-9.112 Y3.455
G0 F9000 X-9.024 Y2.66
G1 F1800 X2.66 Y-9.024 E159.76276
G1 X2.748 Y-9.112
G0 F9000 X1.953 Y-9.024
G1 F1800 X-9.024 Y1.953 E160.40817
G1 X-9.112 Y2.041
G0 F9000 X-9.024 Y1.246
G1 F1800 X1.246 Y-9.024 E161.012
G1 X1.334 Y-9.112
G0 F9000 X0.539 Y-9.024
G1 F1800 X-9.024 Y0.539 E161.57427
G1 X-9.112 Y0.627
G0 F9000 X-9.024 Y-.167
G1 F1800 X-.167 Y-9.024 E162.09503
G1 X-0.079 Y-9.112
G0 F9000 X-.874 Y-9.024
G1 F1800 X-9.024 Y-.874 E162.57422
G1 X-9.112 Y-.786
G0 F9000 X-9.024 Y-1.581
G1 F1800 X-1.581 Y-9.024 E163.01184
G1 X-1.493 Y-9.112
G0 F9000 X-2.288 Y-9.024
G1 F1800 X-9.024 Y-2.288 E163.40789
G1 X-9.112 Y-2.2
G0 F9000 X-9.024 Y-2.996
G1 F1800 X-2.996 Y-9.024 E163.76231
G1 X-2.908 Y-9.112
G0 F9000 X-3.703 Y-9.024
G1 F1800 X-9.024 Y-3.703 E164.07516
G1 X-9.112 Y-3.615
G0 F9000 X-9.024 Y-4.41
G1 F1800 X-4.41 Y-9.024 E164.34645
G1 X-4.322 Y-9.112
G0 F9000 X-5.117 Y-9.024
G1 F1800 X-9.024 Y-5.117 E164.57617
G1 X-9.112 Y-5.029
G0 F9000 X-9.024 Y-5.824
G1 F1800 X-5.824 Y-9.024 E164.76431
G1 X-5.736 Y-9.112
G0 F9000 X-6.531 Y-9.024
G1 F1800 X-9.024 Y-6.531 E164.91089
G1 X-9.112 Y-6.443
G0 F9000 X-9.024 Y-7.238
G1 F1800 X-7.238 Y-9.024 E165.0159
G1 X-7.15 Y-9.112
G0 F9000 X-7.945 Y-9.024
G1 F1800 X-9.024 Y-7.945 E165.07934
G1 X-9.112 Y-7.857
G0 F9000 X-9.024 Y-8.652
G1 F1800 X-8.652 Y-9.024 E165.10122
G0 F9000 X-8.652 Y-8.75
G0 X9.18 Y9.18
G0 X9.25 Y9.25
;TIME_ELAPSED:123.015787
;LAYER:4
G0 X9.25 Y9.25 Z1.08
;TYPE:WALL-INNER
G1 F3600 X-9.25 Y9.25 E165.87036
G1 X-9.25 Y-9.25 E166.6395
G1 X9.25 Y-9.25 E167.40864
G1 X9.25 Y9.25 E168.17778
G0 F9000 X9.75 Y9.75
;TYPE:WALL-OUTER
G1 F1800 X-9.75 Y9.75 E168.98849
G1 X-9.75 Y-9.75 E169.79921
G1 X9.75 Y-9.75 E170.60993
G1 X9.75 Y9.75 E171.42064
G0 F9000 X9.5 Y9.75
G0 X9.024 Y9.024

It won't let me paste it all as the code it too large so heres a sizeable chunk of it.

You don't need to. So this is gcode with absolute extrusion as the e numbers increment as the file progresses.

You can use m83 in start gcode to set relative extrusion and do a G1 E300 F300 to dump 30mm of filament at 5mm/s, at whatever position of the nozzle where you want to dump, but then you need to end the start gcode with M82
G92 E0.

Which sets back to absolute and reset the extruder so it can start from 0 and increment as it prints.

Use a text editor to change that file to read
M109 S0
M302 S1
M83; Sets Extruder to relative mode
G28 ; home all
G1 X-104 Y-60 Z30 F6000 ; move to purge
G0 E15 F150 ; extrude 15mm
G0 E-2 F600 ; retracts 2mm
M82 ; absolute mode
G92 E0 ; resets extruder

Edited 1 time(s). Last edit at 06/02/2017 06:45PM by DjDemonD.

---

Simon Khoury

Co-founder of [www.precisionpiezo.co.uk] Accurate, repeatable, versatile Z-Probes
Published:Inventions

M109 S0
M302 S1 the wiki says M302 S0, but that might not make a difference 
M83; Sets Extruder to relative mode
G28 ; home all
G1 X-104 Y-60 Z30 F6000 ; move to purge
G0 E15 F150 ; extrude 15mm It won't hurt to use G1 instead
G0 E-2 F600 ; retracts 2mm
G92 E0 ; resets extruder

Is it cold, where your printer is? I had problems in winter: the thermistor reading was so low, the controller thought it was an thermistor fault. Then "cold extrusion" won't work, too.

Hi o_lampe, I agree with your changes in red, but the OP is using Cura 2.5 which only works with absolute extrusion, in that Gcode above where do you reset it back to M82, the G92 E0? He's going to see some funky extruder moves if his machine is in relative mode and receiving absolute gcode.

---

Simon Khoury

Co-founder of [www.precisionpiezo.co.uk] Accurate, repeatable, versatile Z-Probes
Published:Inventions

Hello Guys,

ITS WORKING!!

Seems that having the M82 command before the G92 E0 after the purge made all the difference.

Special thanks to DjDemonD and o_lampe

No worries.

---

Simon Khoury

Co-founder of [www.precisionpiezo.co.uk] Accurate, repeatable, versatile Z-Probes
Published:Inventions