Geared stepper motor 1:50 View full size

Geared stepper motor 1:50

Reference: gearedst

Geared stepper motor 1:50, 4Ω, 12V, 0.4Amp, 1.0Nm

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Geared stepper motor 1:50, 4Ω, 12V, 0.4Amp, 1.0Nm

The latest revision of this geared motor has arrived, with 2 steel gears!

Here are the specifications of this little motor. Can be used for direct drive extruder

click to following link to see the motor in action: http://www.youtube.com/watch?v=NYF8tm0hxXo&feature=g-upl

No Fan unit needed.

the extruder body you can find on thingiverse: http://www.thingiverse.com/thing:27675

Beaware if you set your acceleration settings of the extruder to high this can damage the gearbox.

Firmware configuration settings

Default axis steps per unit for e_steps: 1100

Default_max_feedrate for esteps:  45

Default_max_acceleration: 300

DEFAULT_RETRACT_ACCELERATION  300

#define DEFAULT_EJERK                 2.0    // (mm/sec)

 

see below an example how i have configured my firmware.

/*******************************************************/

#define DEFAULT_AXIS_STEPS_PER_UNIT   {44.1644, 44.1644, 400.8877257799672,1100}  // default steps per unit for ultimaker
#define DEFAULT_MAX_FEEDRATE          {500, 500, 5, 45}    // (mm/sec)
#define DEFAULT_MAX_ACCELERATION      {9000,9000,100,300}    // 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          3000    // X, Y, Z and E max acceleration in mm/s^2 for printing moves
#define DEFAULT_RETRACT_ACCELERATION  300   // X, Y, Z and E max acceleration in mm/s^2 for r retracts
 
//
#define DEFAULT_XYJERK                20.0    // (mm/sec)
#define DEFAULT_ZJERK                 0.4     // (mm/sec)
#define DEFAULT_EJERK                 2.0    // (mm/sec)
 
/*******************************************************/

Here are the specs of this little motor.

Phase4/2
Step Angle7.5 degrees
Voltage12V
Drive Mode2 bi-polar
Current0.4A/Phase
Resistance4 +/- 10% ohm/phase
Pull in torque100N.cm min(100PPS)
Pull-in rate280PPS min
  
Insultaion ClassE
Reduction Ratio1:50

how to wire the motor can be found here:

http://2.bp.blogspot.com/-Imy1BiOvu1g/UBbEGaKY7mI/AAAAAAAACCs/3nVIPo-mIWg/s1600/motor150.gif

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