my setup:
mega2560 board (x2)
Ramps 1.4 (x2)
A4988 stepper drivers (2 full sets + spares)
Geared extruder with large gear removed for troubleshooting.
Z stepper motors disconnected from threaded rod for trouble shooting.
I use an LED stepper substitute driver tester from [reprap.org]
I have 4 built on pref board.
I also use a RepRap Easy Driver test board [reprap.org]
all stepper motors have been tested for functionally and all driver boards have been adjusted and tested using above equipment and a spare stepper motor.
I use Repetier on a PC in Manual control mode to control actions.
The problem:
All axis steppers function well.
My extruder runs fine in the feed direction but makes grinding noises and does not move in the retract direction.
Trouble shooting:
I have tested with 2 different mega2560 & Ramps hardware setups and both Marlin 1.1.9 and 1.1.4 with same results.
I have plugged in a different stepper motor, swapped one z axis stepper and extruder stepper,
problem remains with extruder driver.
Changed out A4988 and problem still there.
Just to avoid the "standard query" the system was fully powered down and disconnected from PC before any changes where made.
Logic says the problem must be in the Arduino or its software, the Ramps board, the Stepper drivers, wiring or the stepper motors.
I am at a loss as to why this is happening as I have changed everything.
I am wondering if there is some setting for the extruder that I have wrong.
As the configuration.h edits have been ported from 1.1.4 to 1.1.9 and 1.1.4 had worked previously I don't think that should be the case
any Ideas???
mega2560 board (x2)
Ramps 1.4 (x2)
A4988 stepper drivers (2 full sets + spares)
Geared extruder with large gear removed for troubleshooting.
Z stepper motors disconnected from threaded rod for trouble shooting.
I use an LED stepper substitute driver tester from [reprap.org]
I have 4 built on pref board.
I also use a RepRap Easy Driver test board [reprap.org]
all stepper motors have been tested for functionally and all driver boards have been adjusted and tested using above equipment and a spare stepper motor.
I use Repetier on a PC in Manual control mode to control actions.
The problem:
All axis steppers function well.
My extruder runs fine in the feed direction but makes grinding noises and does not move in the retract direction.
Trouble shooting:
I have tested with 2 different mega2560 & Ramps hardware setups and both Marlin 1.1.9 and 1.1.4 with same results.
I have plugged in a different stepper motor, swapped one z axis stepper and extruder stepper,
problem remains with extruder driver.
Changed out A4988 and problem still there.
Just to avoid the "standard query" the system was fully powered down and disconnected from PC before any changes where made.
Logic says the problem must be in the Arduino or its software, the Ramps board, the Stepper drivers, wiring or the stepper motors.
I am at a loss as to why this is happening as I have changed everything.
I am wondering if there is some setting for the extruder that I have wrong.
As the configuration.h edits have been ported from 1.1.4 to 1.1.9 and 1.1.4 had worked previously I don't think that should be the case
any Ideas???