Question about vibrating step motor (RAMPS 1.4 + A4988 Stepstick + Marlin firmware )

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AndrewBCN
Z stepper acceleration is completely wrong, it should be between 2 and 5. Also set a much lower default acceleration, something like 500 for tests.

And recheck the steppers wiring. Vref=1V is a good starting point in your case.

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o_lampe

Quote
AndrewBCN
Z stepper acceleration is completely wrong, it should be between 2 and 5. Also set a much lower default acceleration, something like 500 for tests.

And recheck the steppers wiring. Vref=1V is a good starting point in your case.

z-Speed should be 2-5, acceleration of 100 is fine...
-Olaf

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//// MOVEMENT SETTINGS
#define NUM_AXIS 4 // The axis order in all axis related arrays is X, Y, Z, E
#define HOMING_FEEDRATE {25*60, 25*60, 2*60, 0} // set the homing speeds (mm/min)

// default settings

#define DEFAULT_AXIS_STEPS_PER_UNIT {160,160,4000,775} // default steps per unit for Ultimaker
#define DEFAULT_MAX_FEEDRATE {400, 400, 1, 45} // (mm/sec)
#define DEFAULT_MAX_ACCELERATION {5000,5000,10,5000} // X, Y, Z, E maximum start speed for accelerated moves. E default values are good for Skeinforge 40+, for older versions raise them a lot.

#define DEFAULT_ACCELERATION 1000 // X, Y, Z and E max acceleration in mm/s^2 for printing moves
#define DEFAULT_RETRACT_ACCELERATION 2000 // X, Y, Z and E max acceleration in mm/s^2 for retracts

// Offset of the extruders (uncomment if using more than one and relying on firmware to position when changing).
// The offset has to be X=0, Y=0 for the extruder 0 hotend (default extruder).
// For the other hotends it is their distance from the extruder 0 hotend.
// #define EXTRUDER_OFFSET_X {0.0, 20.00} // (in mm) for each extruder, offset of the hotend on the X axis
// #define EXTRUDER_OFFSET_Y {0.0, 5.00} // (in mm) for each extruder, offset of the hotend on the Y axis

// The speed change that does not require acceleration (i.e. the software might assume it can be done instantaneously)
#define DEFAULT_XYJERK 20.0 // (mm/sec)
#define DEFAULT_ZJERK 0.4 // (mm/sec)
#define DEFAULT_EJERK 5.0 // (mm/sec)

Quote
laopa

As _o_Lamp, be sure one pair is on A and the other is on B.