I use orca slicer BTW
Edit: I probably should note, the TPU grip is a ring around the blue part
Iâm not using orca frequently so only guessing.
It is possible to cut the model at your desired height, so you could select another filament.
For filamentchange there should be a gcode section which should have M600 inserted.
Then the machine should do itâs filament change routine at this point.
M600
Alternatively you could insert the M600 manually into your gcode by editing the âtext-fileâ before printing.
Yes. I donât use Orca specifically to know how to do it there.
But you want to add an M600 filament change command at the specific layer itâs needed.
I think if you right click on the vertical layer selection preview slider when the correct layer is chosen there might be an option to add a command? At least I think thatâs how it is in Prusa slicer. 
The âchange filamentâ option is greyed out. And If I manually add M600 T0 I think it would just change toolheads(correct me if Iâm wrong). Either way. I wouldnât have any filament to select since the profile only allows for two material options
M600 is not a tool swap command. It triggers a pause for a filament change by the user.
When triggered the printer saves state then parks, with the adjust menu active so you can unload and reload filament.
Although sorry, thinking more about what you want to do, Iâm not sure how to tell the slicer that the actual material is changing at a specific layer. The above only tells it to stop so you can do the physical swap, not change the settings also.
Thatâs⊠Yeah, I dunno what slicer has an option to do that!
In Cura you can create a box that modifies settings inside of a defined box (modifier box) that could probably be leveraged to do this, but I dunno about Orca.
In Orca, you need to slice your model first. Then, in the preview, use the vertical slider on the right to go to your layer of interest. In your case layer 4. Next, right-click on the small + at the level of your layer and you should get a menu like that:
The rest is self-explanatory I guess 
For my profile, âchange filamentâ is greyed out
Looks like you have a printer set up with only one extruder.
Anyway, I think what you could do is just pause. Then use the printer interface to unload the current filament, load the new filament and resume the print.
May I ask which version of OrcaSlicer you are using?
I think itâs using the same command for tool changes
I will tell you my version when I get to my PC
Of course, as mentioned above, and missed by a few here; after a filament change, ZT_1234 wants to change the filament settings too, temp, speed, etcâŠ
I think you can use M163 to set up a virtual tool. Add a third filament in orca (if possible?). Use M600 to pause.
M163 S0 P1
M163 S1 P0
M164 S2
I think this should enable your virtual tool as T2 (I believe it should be same physical tool as T0).
edit: ah nevermind I see that it requires MIXING_EXTRUDER to be enabled in firmware 
Is it possible for a user to enable this?
If youâre lucky, itâs already enabled in the firmware. If not, I think you have to recompile
How can I check this?
Not sure. I guess you could just connect a USB, send the commands and see if you get an error back.
Good catchâŠ
What about setting up the printer as a single extruder multifilament with manual filament change?
Why?
Only sm2uplaoder v2.8 will handle correctly more than 2 filaments on the J1; and
sm2uploader v2.8 is only compatible with OrcaSlicer v2.1.x to my understanding.
Then add as many as filaments you would like. Slice. Set the filament change at the desired height. Slice again. Send to the printer.
Even filament number will be assigned to T0 and odd filament number will be assigned to T1.
This is just an UNTESTED idea.
Iâll try it
Instead of change filament, you can also just add custom gcode with that menu. Add the code M600 at the desired layer.
I donât know why it was greyed out, but thatâs the simple standard way to do it.
