28BYJ-48_Stepper Extruder
thingiverse
The gear is using MK8 drive gear.\nIt fits this MK8 Drive Gear.http://www.ebay.com/itm/391045370601\nAttach the extruder to the 2020 aluminum frame with an M4 screw.\n2020 aluminum frames are attached to the extruder with an M4 screw.\nThe following supported files can be printed easily: 28BYJ48_Extruder_support.stl\nIf you use Ramps1.4 with 28BYJ48, change the unipolar connection to a bipolar connection by cutting the board in the middle and removing the blue cover.\nAfter changing to a bipolar connection, the A4988 driver can be used without any problems (but cooling is required).\nLong-term use may cause the motor's metal case to heat up, so a fan must be used for cooling.\nThe 123D source is also available, so it would be great if you could remix and highlight any points you've discovered;)-)
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