printing horror show

[Ade O]

hi if your using cura you can select the individual extruders you wish to print a model from and also set up multi colour prints even as far as setting up virtual extruders for mixing the colours ive just set one up with 8 individual colours 3 of the standard extruders then 5 mixed from the other 3 ive learnt every thing by following the videos of 1zradio you tube channel https://www.youtube.com/channel/UCo2rzw ... 5vBHdQED2A
he talks you through the whole process my prints were horrific but I followed his 3 or 4 videos and wow the difference is amazing my printing has gone from total dejection to actually amazement of what they are capable of

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in hours honestly I couldn't sing his praises enough
I hope this helps you as much as it did me
oh and he has instruct videos on other slicers too

Ade

[Ade O]

if you do still want the gcode he will talk you through that too but here is what I used for 8 colours

;virtual extruders for mixed colours

;extruder 1

M163 S0 P1
M163 S1 P0
M163 S2 P0
M164 S0

;extruder 2

M163 S0 P0
M163 S1 P1
M163 S2 P0
M164 S1

;extruder 3

M163 S0 P0
M163 S1 P0
M163 S2 P1
M164 S2

;extruder 4

M163 S0 P0.70
M163 S1 P0.30
M163 S2 P0.00
M164 S3

;extruder 5(s4)

M163 S0 P0.75
M163 S1 P0.00
M163 S2 P0.25
M164 S4

;extruder 6

M163 S0 P0.00
M163 S1 P0.70
M163 S2 Po.30
M164 S5

;extruder 7

M163 So P0.70
M163 S1 P0.20
M163 M2 P0.10
M164 S6

;extruder 8(s7)

M163 S0 P0.85
M163 S1 P0.10
M163 S2 P0.05
M164 S7

the extruders 4 to 8 will need to be set up in the slicer software as extruders when you set no. of extruders for a new machine profile don't simply choose a20t profile set a custom profile with the amount of extruders you want for mixing your colours
The extruders 1 to 3 are your standard 3 one colour each at 100% from each.

here is my cura profile for 8 colours

0.2 8 colours.zip

(1.18 KiB) Downloaded 485 times

OK so I found some mistakes in the above gcode and the cura profile had too small prime tower but I have rectified these faults and the above should be all good now so sorry
Ade

[Ade O]

if you want a copy of my cura profile just shout

Ade

[Ade O]

here is my cura profile that works well for me

0.2 3 colours backup profile.zip

(1.17 KiB) Downloaded 591 times

[Ade O]

I know there not perfect by any stretch of imagination but compared to what I started with well its def woo hoo time and hopefully some one can improve on them and point me in the right direction

[Bobertino]

If you are printing a single colour make sure the other 2 filaments are pulled out of the hot end slightly. I found that it was causing issues with retractions not relieving the pressure in the hot end. Made an instant difference when I realised after doing the multicolour test print.

I now have it taken care of automatically in the code I use, but very frustrating till I realised.

Worth a look.

Hi,

Can you share the gcode you are using please?

Best to checkout my purge bucket make here: https://www.thingiverse.com/make:804257

Purge bucket has delivered much better results for me than a purge tower, although I will likely mod the design to make it deeper in future.

Retraction is always part of an extruder finish filament shouldn't be left in the hot end causing pressure problems (unless you abort a print of course)

[Ade O]

nice one good build ill try that myself