Cyclops HotEnd support

[MoonshineSG]

Is there support for Cyclops hotend ? I found some reference to SINGLENOZZLE but it looks like it hasn't made it to the main repo.
Any hints on how to get this working ?

[jbrazio]

I don't believe it is working, if I do a search for SINGLENOZZLE it is not found anywhere.

[thinkyhead]

The MarlinKimbra fork implements SINGLENOZZLE. That isn't a current option in the main Marlin project yet.

We are working on Mixing Extruder support, which requires similar hooks to do proportional mixing. If the Cyclops can do proportional mixing with both feeds coming in at the same time, then the Mixing Extruder stuff can be adapted for it. We need to have a look at the GCode for the Cyclops. If it uses T0 and T1 commands to switch the filament inputs (or mix-factors) then it should work very well with this upcoming feature.

[Sebastianv650]

E3d says mixing: no. So why not treat it as independent extruders sitting in the same location?

[thinkyhead]

@Sebastianv650 If it can't do mixing, but has two E steppers, then we have a choice. We could adapt the SINGLENOZZLE feature, which does work like that (so EXTRUDERS == 2). Or, we could try to be a little more more formal in how we define extruders, and actually have the concept of a single extruder (EXTRUDERS == 1) with multiple input feeds (e.g., E_STEPPERS == 2), which is more of the approach taken by MIXING_EXTRUDER_FEATURE (which uses MIXING_STEPPERS >= 2).

The SINGLENOZZLE approach is probably much simpler to implement.

The advantage of the second approach is that it would allow DUAL_X_CARRIAGE (or other forms of dual-extruder setup) with two Cyclops extruders, thus giving 4-color support.

[thinkyhead]

Ah, what the heck. Why not? #3808

[ghost]

It seems that PR #3808 isn't only support Cyclops but also support Diamond Hotend(but only with separated colour mode).
Is it right?

[thinkyhead]

@esenapaj Yeah, it will support any hotend with multiple E steppers, but yes, only in separate-color mode. Proportional mixing is a little more complicated, but also ready to go.

[MoonshineSG]

this is good. It also means that when you change from a dual nozzle to single you need to load new firmware... switching between single/dual with a special M code would be awsome... but maybe a bit complicated to implement, so firmware switch it is... :D

[jbrazio]

Closing the issue: Feature PR was merged.

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