Extruder not working and other anomalies

I just built a Prusa variant. I uploaded the repetier firmware. Using Repetier host I wanted to get the motors moving manually. The Z axis moves fine in .1 and 1 increments. In 10 increments, it freezes going down half way, makes a buzzing noise, and then stops. The extruder are not working. What could be causing these problem? Is it the RAMPS board, the stepper drivers, or something else? Also, the LCD display doesn't work when connected. I'm assuming it should be on without needing to do anything. It also makes a high pitch whining sound when connected. Any help would be appreciated.

Edited 1 time(s). Last edit at 02/19/2016 12:57AM by mlaustin66.

You need to actually configure your printer....

for eg the Z axis your max feed rate is to high in firmware... (at a guess)
You also need to set the vrefs on your stepper drivers. eg [reprap.org]
And enable the LCD you have in the configuration.h of the firmware you have (I dont use repetier firmware, so cant help you here)

Assembling your printer is only the first 1/3 of building a working 3d printer.

As a start
Take a look at [reprap.org]

Edited 1 time(s). Last edit at 02/19/2016 03:47AM by Dust.

Dust, thanks for the links. I will check them out. The firmware is configured. The extruder motor works because I plugged it into one of the other motor ports. All motors work except the extruder motor. I have another stepper driver I will try to see if it fixes it and post the results. The max extruder federate is set to 2. Regarding the LCD, I checked and 1 freaking pin wasn't connected on the RAMPS board. That is now cleared up.

So I went through all the stepper drivers and adjusted the polarity. It made a difference on the z axis, so thanks for pointing that out. The extruder it made no difference and neither did changing the extruder driver. Perhaps it is the board itself. Would that be the case?

Here are my extruder setting outside of temperature.

#define EXT0_X_OFFSET 0
#define EXT0_Y_OFFSET 0
#define EXT0_Z_OFFSET 0
#define EXT0_STEPS_PER_MM 152
#define EXT0_TEMPSENSOR_TYPE 1
#define EXT0_TEMPSENSOR_PIN TEMP_0_PIN
#define EXT0_HEATER_PIN HEATER_0_PIN
#define EXT0_STEP_PIN ORIG_E0_STEP_PIN
#define EXT0_DIR_PIN ORIG_E0_DIR_PIN
#define EXT0_INVERSE 0
#define EXT0_ENABLE_PIN E0_ENABLE_PIN
#define EXT0_ENABLE_ON 0
#define EXT0_MAX_FEEDRATE 50
#define EXT0_MAX_START_FEEDRATE 20
#define EXT0_MAX_ACCELERATION 5000
#define EXT0_HEAT_MANAGER 1
#define EXT0_WATCHPERIOD 1
#define EXT0_PID_INTEGRAL_DRIVE_MAX 230
#define EXT0_PID_INTEGRAL_DRIVE_MIN 40
#define EXT0_PID_PGAIN_OR_DEAD_TIME 16.50
#define EXT0_PID_I 1.90
#define EXT0_PID_D 37.00
#define EXT0_PID_MAX 255
#define EXT0_ADVANCE_K 0
#define EXT0_ADVANCE_L 0
#define EXT0_ADVANCE_BACKLASH_STEPS 0
#define EXT0_WAIT_RETRACT_TEMP 150
#define EXT0_WAIT_RETRACT_UNITS 0
#define EXT0_SELECT_COMMANDS ""
#define EXT0_DESELECT_COMMANDS ""
#define EXT0_EXTRUDER_COOLER_PIN 6
#define EXT0_EXTRUDER_COOLER_SPEED 255
#define EXT0_DECOUPLE_TEST_PERIOD 12000
#define EXT0_JAM_PIN -1
#define EXT0_JAM_PULLUP 0


#define UI_SET_EXTRUDER_FEEDRATE 2
#define UI_SET_EXTRUDER_RETRACT_DISTANCE 3
#define PDM_FOR_EXTRUDER 0

Edited 1 time(s). Last edit at 02/19/2016 12:36PM by mlaustin66.

Ok, I think I resolved it. I was trying to do a cold run with the M302 command. While it said it was on, it wasn't working. So I heated up the hotted to 180 celsius and I was able to get the extruder working. Sucks being new to all this and feeling not so smart.