Extruder Fan Not Automatically starting
I just upgraded my Rambo Mini board from v1.0 to v1.3. Everything seems to be working but the extruder fan is not automatically starting when the tem reaches 50C. What should I do to troubleshoot this? So far all I have done is to issue M106 command which does start the fan. What would be the speed I should use for the M106 gcode? I am just using 255.
Thanks
Re: Extruder Fan Not Automatically starting
Hi Tim
Sorry, a bit busy at the moment, so only time for a quick reply...
Firmware for RAMBo 1.3a. 1,75mm (V2.2.0)
M106 activates the part fan; the extruder fan should be automatic and is built into the firmware (Configuration.adv.h):
// Extruder cooling fans
// Configure fan pin outputs to automatically turn on/off when the associated
// extruder temperature is above/below EXTRUDER_AUTO_FAN_TEMPERATURE.
// Multiple extruders can be assigned to the same pin in which case
// the fan will turn on when any selected extruder is above the threshold.
#define EXTRUDER_0_AUTO_FAN_PIN 8
#define EXTRUDER_1_AUTO_FAN_PIN -1
#define EXTRUDER_2_AUTO_FAN_PIN -1
#define EXTRUDER_AUTO_FAN_TEMPERATURE 50
#define EXTRUDER_AUTO_FAN_SPEED 255 // == full speed
If M106 starts the extruder fan then you have the fan connected to the wrong output pins.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Extruder Fan Not Automatically starting
My extruder fan was wired reverse polarity!
I popped th pins out of the header and reversed them.
now Ok.
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK