3D Printed Robot Arm

Prints (0)

Description

http://www.instructables.com/i...

This robot arm is made almost entirely of 3D printed parts that snap together. It has three servo-controlled joints, plus a rotating base and gripper. The arm is controlled by a series of buttons that connect to an Arduino Uno hidden in the base. A simple circuit makes connecting the servos and buttons to the Arduino easy and makes set-up and assembly very quick.

The arm is about 20 inches long, so it takes a lot of time and material to print. The parts are sized to fit on the bed of the Afinia H479 printer, and some can be printed together on the same platform to save time. I used a resolution of 0.25mm and hollow fill for all the parts (other settings were set to the defaults). In addition, I found that I needed to use a raft to both help the part adhere to the print platform and help the printer compensate for my table, which was not perfectly level.

The total estimated print time for the arm is about 32.5 hours, although as mentioned earlier some parts can be printed together (the estimate was done using the print preview function of Afinia's software - my actual print time was difficult to calculate because I was still iterating through designs). Including the raft material, it uses 842.8g of filament, which means it can be printed from one 1kg roll.

Most of the parts have "flat" sides that should face the platform . Many of them also have fairly delicate tabs for holding the cables, so take care when you remove the raft and support material. Study the stl file first to get an idea of where the most delicate areas are

Design Files

File Size

lower_curvehorn_cable.stl
224 KB
lower_bracehorn.stl
25.4 KB
full_assem.stl
7.96 MB
base_toprotateBox.stl
664 KB
base_servomountcurve.stl
236 KB
base_bottombuttonsBox.stl
262 KB
base_bottomrotate.stl
333 KB
base_bottomrotateBox.stl
187 KB
base_servomountcurveMirror.stl
235 KB
base_topbuttonsBox.stl
461 KB
base_toprotate.stl
675 KB
gripper_base.stl
370 KB
gripper_base2.stl
244 KB
gripper_gearMirror.stl
249 KB
gripper_gearServo.stl
210 KB
lower_bracepin.stl
19.3 KB
lower_curvehorn.stl
243 KB
lower_curvepin.stl
228 KB
lower_curveservo.stl
128 KB
mid_braceL.stl
20.7 KB
mid_braceU.stl
20 KB
mid_curveLhorn.stl
232 KB
mid_curveLpin.stl
240 KB
mid_curveUhorn.stl
233 KB
mid_curveUpin.stl
321 KB
upper_pin.stl
138 KB
upper_servo.stl
108 KB

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