Extruder motor noise, sporadic extrusion, Fan quits

[Lateralg]

Marlin M2Marlin24r2.
My changes to configuration.h are:

#define DEFAULT_ACCELERATION 1000
#define X_MAX_LENGTH 217 // ** 01_31_2015
#define Y_MAX_LENGTH 245 // ** 01_31_2015
#define Z_MAX_LENGTH 170 // ** 01_31_2015
#define DEFAULT_MAX_ACCELERATION {1000,1000,30,10000} // ** 01_28_2015 X, Y, Z, E
#define DEFAULT_ACCELERATION 1000
#define DEFAULT_XYJERK 10.0
#define E0_CURRENT 230 // ** 01_29_2015
#define E1_CURRENT 200 // ** 01_29_2015

I use S3d software.

Issues are:
1) Extruder fan (24V) starts as soon as RAMBo is powered on, but stops when print starts.

2) Extruder motor does a lot of "clunk-clunk", and extrusion of plastic is sporadic when it's very active making short moves & reversals. But it'll extrude continuous 100 mm without a peep.

I got into this mess by cleaning house in my computer files ... deleting duplicates of old stuff, and starting fresh with the latest. Bad move.

I would attach configuration.h if forum allowed

[Tim]

If you want to attach a configuration.h file, just put it in a .zip file, which the forum allows.

The extruder fan should always be on; that and the electronics case fan should be connected (in series, on the 24V setup, since both fans are 12V) to the same terminal block. This is in Configuration_adv.h, line 78. Although. .. you say that your extruder fan is 24V. Are you sure, and are you talking about the fan that blows directly at the extruder motor? I thought that one has always been 12V. At any rate, you need to figure out what the firmware thinks its driving.

I do see a difference between the "MakerGear24V" Marlin version and the one that I use, which is "M2_Dual_Extruder_Marlin". The former has:

Code: Select all

#define EXTRUDER_0_AUTO_FAN_PIN   6
#define EXTRUDER_1_AUTO_FAN_PIN   -1
#define EXTRUDER_2_AUTO_FAN_PIN   -1
// M2: extruder fan also runs the electronics fan. Set to turn on at any reasonable temperature.
#define EXTRUDER_AUTO_FAN_TEMPERATURE 35
#define EXTRUDER_AUTO_FAN_SPEED   255  // == full speed

while the latter has:

Code: Select all

#define EXTRUDER_0_AUTO_FAN_PIN   -1
#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

The problem is, I can't really see why either one of those configurations makes any sense, or matches the behavior of the M2.