Fan setting and control
Hi,
I try to setup firmware configuration, and have problems with fans. I have a corexy printer with one extruder, RAMPS 1.4 and Repetier V 1.0.0dev.
Actually, I don't understand the definitions and settings about fans and temperature control, so please help.
I have the hotend cooling fan connected to D9 and so I can control the fan via Repetier Host manual control.
I have installed a fan extender board on the servo pins and have tested this with a small ,Arduino test program. The two servo outputs work on Digital pins 4 and 5.
What I want is:
- Hotend fan only controlled by extruder temperature (e.g. start at 100°C with low PWM setting and go to max PWM setting 255 when reaching target temperature.
- print cooling with a second fan which ideally gets manually controlled via Repetier Host. Don't know whether this fan could also be controlled by a Slic3er setting.
Comments
The problem with ramps is that it ha snot enough power outputs. FAN_PIN and HEATER_2_PIn are identically 9. What you use it for doe snot matter just do not use pins twice. Same for part and extruder cooling fan. Just select a pin you want and make sure the other functions do not use the same pin number. Same numbers means 2 functions set speed and the result is not what you expect.
The print cooling fan is set in features I think.
#define EXT0_EXTRUDER_COOLER_SPEED 150