MakerGear Forum

Posted: **Sun Feb 01, 2015 10:20 pm**

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

Posted: **Sun Feb 01, 2015 11:58 pm**

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.

MakerGear Forum

Extruder motor noise, sporadic extrusion, Fan quits

Extruder motor noise, sporadic extrusion, Fan quits

Re: Extruder motor noise, sporadic extrusion, Fan quits