Dual Extruder setup BLV-printer with 2-1 Mellow Mosquito hotend

Veti

@knutselsmurf said in Dual Extruder setup BLV-printer with 2-1 Mellow Mosquito hotend:

M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin
M308 S1 P"e0temp" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin e0temp

The thermistor seetings are wrong. B4138 is the default. I dont know the correct values for that specific hotend.

for the tool selection
do you have the T0 and T1 in there?

knutselsmurf

Not sure why you think that the hotend settings are wrong, I have done PID tuning for bed and hotend, seems ok..

Tools:
alt text

knutselsmurf

I use this hotend:

alt text

knutselsmurf

I just found out that this hotend can't mix 2 different filaments (I use PETG, different colors).
When printing with extruder1, first thing to do is retract extruder2 for about 100mm. And visa versa. If no retraction: it's not possible to load the filament.

So, I need some TOOL CHANGE GCODE:

retract 100 mm of current extruder
switch tool
load and purge
continue

No idea how I must do that in CURA

Any help would be great!

Veti

@knutselsmurf said in Dual Extruder setup BLV-printer with 2-1 Mellow Mosquito hotend:

Not sure why you think that the hotend settings are wrong, I have done PID tuning for bed and hotend, seems ok..

using an incorrect setting for the thermistor will result in the displayed temperature and the real temperature to be different. high temperature hotends especially.

knutselsmurf

I have this thermistor: https://nl.aliexpress.com/item/4000100545980.html

Veti

that thermistor does not fit in the mellow mosquito

are you getting heater cartridge and thermistor mixed up?

knutselsmurf

it fits, no probem.
alt text

knutselsmurf

But you are right about the thermistor settings, didn't now

Hotend NTC 3950 Thermistor Specs:

Resistor below 25C: 100 K
Beta value: 3950 K

Veti

@knutselsmurf said in Dual Extruder setup BLV-printer with 2-1 Mellow Mosquito hotend:

it fits, no probem.

well no. that hotend required a thermistor catridge. without it its not making good enough contact.

this is the type of thermistor you require for this hotend.
https://de.aliexpress.com/item/4000591370691.html

knutselsmurf

I am using this heated bed:
35X35X0.3 cm Creality 3D Heatbed

Don't have the resistor and beta value yet..

Veti

look at the generated g code.
is there a T0 or a T1 before the first extrusion command?

knutselsmurf

@Veti I have ordered the Mellow thermistor now. But the current thermistor seems to be ok, stable temperature... And I have a nice filament flow.. I will replace it as soon as I got the correct one

Ok, I will do a new hotend PID tuning..

knutselsmurf

"look at the generated g code.
is there a T0 or a T1 before the first extrusion command?"

Yes

knutselsmurf

@knutselsmurf oh, shit: I have the right heater and thermistor already
https://nl.aliexpress.com/item/4001294136528.html (set 2, 24V)

Will replaced it..

A Former User

Why do you have G21 in your slicer start g-code ?

Veti

the semitec values are B4725 C7.06e-8