Appologies up front if this is too basic or has been answered before:)
Im attempting to print Pnumatic bushings for an art project and am Printing with:
- eSUN ePA-GF, 1.75mm
- Print temp range: 220–250°C
- Printer: QIDI X-Max 3
There's no working ePA-GF profile in QIDI Studio so I've been building my own start/end G-code. My main issue has been finding reliable, sourced information on which M106 P-values correspond to which physical fans on the X-Max 3.
Through research, I've found the following mapping referenced in multiple QIDI Klipper config files on GitHub (Fisheye3D, billkenney qidi_3series_recovery, Phil1988 FreeDi):
- **M106 P0** — Part cooling fan (printhead)
- **M106 P2** — Auxiliary side fan (chamber circulation)
- **M106 P3** — Activated charcoal exhaust fan
Based on that, I've written the following G-code. Can anyone with an X-Max 3 confirm these fan assignments are correct before I run this?
I've dried the filament at 70C for 26 hours with 600G of fresh deasicatant. no popping or spooging was witnessed.
**Filament start G-code:**
```
; Filament start gcode - ePA-GF nylon
M141 S45 ; Chamber to 45C for nylon
M106 P2 S255 ; Side circulation fan on
M190 S75 ; Bed to 75C and wait
M104 S150 ; Nozzle standby while chamber warms
TEMPERATURE_WAIT SENSOR="heater_generic hot" MINIMUM=40 ; Wait for chamber
M109 S248 ; Heat nozzle to 248C
```
**Filament end G-code:**
```
; End gcode - ePA-GF nylon
M141 S0 ; Turn off chamber heater
M106 P2 S0 ; Turn off side fan
M106 P3 S0 ; Turn off charcoal fan
```
Specific questions:
Can anyone confirm P2 = side auxiliary fan and P3 = charcoal exhaust fan on the X-Max 3?
Are these temperatures reasonable for ePA-GF — 45°C chamber, 75°C bed, 248°C nozzle?
Should the charcoal fan (P3) be running during the print for ventilation, or off to retain chamber heat?
Getting the ventilation fan assignment right matters. Any help appreciated.