Re: Delta-Pi Endstop Problem in Repeteir

You shouldn't need to mess with the PINS settings. RAMPS1.4 is covered by #define MOTHERBOARD 33
If you use this then in pins.h it is already configured as this:

#define E0_STEP_PIN         26
#define E0_DIR_PIN          28
#define E0_ENABLE_PIN       24

Here's a couple of other settings I think I may have changed from default.(can't remember for sure)

#define ENDSTOP_X_RETEST_REDUCTION_FACTOR 8
#define ENDSTOP_Y_RETEST_REDUCTION_FACTOR 8
#define ENDSTOP_Z_RETEST_REDUCTION_FACTOR 8

#define X_MAX_LENGTH 200
#define Y_MAX_LENGTH 200
#define Z_MAX_LENGTH 344

#define X_MIN_POS -100
#define Y_MIN_POS -100
#define Z_MIN_POS 0

#define MAX_FEEDRATE_X 300
#define MAX_FEEDRATE_Y 300
#define MAX_FEEDRATE_Z 300

#define HOMING_FEEDRATE_X 40
#define HOMING_FEEDRATE_Y 40
#define HOMING_FEEDRATE_Z 40

#define STEP_DOUBLER_FREQUENCY 10000
#define ALLOW_QUADSTEPPING true

#define MAX_ACCELERATION_UNITS_PER_SQ_SECOND_X 1500
#define MAX_ACCELERATION_UNITS_PER_SQ_SECOND_Y 1500
#define MAX_ACCELERATION_UNITS_PER_SQ_SECOND_Z 1500

#define MAX_TRAVEL_ACCELERATION_UNITS_PER_SQ_SECOND_X 3000
#define MAX_TRAVEL_ACCELERATION_UNITS_PER_SQ_SECOND_Y 3000
#define MAX_TRAVEL_ACCELERATION_UNITS_PER_SQ_SECOND_Z 3000

As for the clicking noise, It could be very high speed short moves and a small amount of play in one of the linkages.
Also, check you have got the carriages preloaded sufficiently. You should be able to press your finger on one of the top bearings and when you move the carriage the bearing should roll on the tube and slip against your finger, not slip on the tube.
Did you see the flickr stream? I have a few pictures there of the current state. I added bracing panels to two of the back corners. These stiffened the whole assembly up and make if far more robust. I was always worried about the tube mounts breaking till I added the braces.
I also added a small coin under the end of the carriage preload bolt to stop it digging in to the plastic. See the flickr stream for photos.