Merge pull request #17 from BryanZero/main
Added STL files for 3D printing, updated BOM, README and added images
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12 changed files with 28 additions and 16 deletions
19
README.md
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README.md
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## Micro Manipulator Stepper
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This project contains an open source low-cost, easy-to-build motorized **XYZ Micro-Manipulator** motion control platform achieving sub micrometer precision.
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This project contains an open source low-cost, easy-to-build motorized **XYZ Micro-Manipulator** motion control platform achieving submicron precision.
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It's designed for applications such as optical alignment, probing electronic components, and microscopy.
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Check out the YouTube video for more information about the device and how it is built:
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[](https://youtu.be/MgQbPdiuUTw)
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# Youtube Video
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[](https://youtu.be/MgQbPdiuUTw)
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Thanks to its parallel kinematic structure and miniature ball joints, it achieves good mechanical stiffness and a large range of motion.
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The motors are off the shelf stepper motors driven by a 30 kHz closed loop controller and a very precise PWM signal.
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A 'magnetic gearing' approach increases the resolution of the low-cost magnetic rotary encoders by a factor of 30 allowing for steps down to 50nm
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(**Please mind the difference between resolution and accuracy**. The absolute accuracy is much lower).
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(**Please mind the difference between resolution and accuracy**. The absolute accuracy is significantly worse.
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The device can be controlled via simple G-Code commands over a USB serial interface and is thus easily integrated into other projects.
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The firmware implements a complete motion planning stack with look-ahead for smooth and accurate path following capabilities.
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@ -29,9 +30,11 @@ You can also 3D-Print the parts but have to live with thermal drift (carbon fill
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<br>
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The files can be found here: [CAD Models](construction).
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The CAD files can be found here: [CAD Models](construction).
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Please note that FreeCAD version **1.1.0dev** was used, and the files might not work with older versions.
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STL files for printing can be found here: [STL Files](construction/STL_3D_Printing/)
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### ⚙ Kinematic Model
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The kinematic model is defined here: [kinematic_model_delta3d.cpp](firmware/MotionControllerRP/src/kinemtaic_models/kinematic_model_delta3d.cpp).
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@ -39,7 +42,7 @@ Please check the dimensions of your build against the values set in the construc
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### ⚙ Electronics
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IMPORTANT: If you fabricated PCB verion v1.2 (see version label on the board) you need to drill out a misplaced via on diode D1 that shorts 5V rail to ground. The problem was fixed in v1.3.
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IMPORTANT: If you fabricated PCB verion v1.2 (see version label on the board) you need to drill out a misplaced via on diode D1 that shorts 5V rail to ground (See [repair image](electronics/pcb_v1.2_fix.jpg) ). The problem was fixed in v1.3.
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The electronics are designed in **KiCAD** and only commonly available modules (motor drivers and MCU boards) are used and connected by a simple PCB. No SMD soldering is required to populate the board to make the build extra accessible.
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For usual winding resistance of your motors, the device should be powered by $${\color{lightgreen} 5V-6V }$$ (2A) to keep current and heating to a reasonable level.
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@ -83,9 +86,3 @@ The client must wait for an acknowledgment from the previous command before send
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| `M51` | Get motion controller and servo loop update frequency. |
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| `M52` | Get the number of items in the planner queue. |
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| `M53` | Check if all moves are finished. Returns `1` if finished, `0` otherwise. |
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# Youtube Video
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[](https://youtu.be/MgQbPdiuUTw)
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25
bom.txt
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bom.txt
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* 1m Brass Pipe OD=2mm ID=1mm
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* 12 M2 Screw M2x12mm, Counsersunk
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* 12 M2 Screw M2x12mm, Countersunk
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* 6 M3 Grub Screw M3x4
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* 6 M3 Grub Screw M3x4
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--- Electronics -------------------------------------------------------------------
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Qty. Name Comments
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* 2 4.7k Resistor 0603 (optional)
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* 1 2 Pin Power Header
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* 4 4 Pin Header
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* 1 8 Pin Header
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* 1 2 Pin Power Header 7.5 mm pitch
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* 4 4 Pin Header 2.5 mm pitch
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* 1 8 Pin Header 2.0 mm pitch
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* 3 NEMA 17 Stepper Motor (Body length <= 38mm)
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--- 3D Printing ------------------------------------------------------------------
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Qty. Name Comments
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* 3 WireFlexureMount 0.4mm+ nozzle will probably require post-processing.
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* 3 RubberBandCollet 0.4mm+ nozzle will probably require post-processing.
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* 3 BallJointMount 0.4mm+ nozzle will probably require post-processing.
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* 3 Motor Mount
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* 1 EndEffector
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* 1 Base Block
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BIN
construction/v3_3dprinting_stl/BallJointMount.stl
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construction/v3_3dprinting_stl/BallJointMount.stl
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construction/v3_3dprinting_stl/BaseBlock.stl
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construction/v3_3dprinting_stl/BaseBlock.stl
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construction/v3_3dprinting_stl/EndEffector.stl
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construction/v3_3dprinting_stl/EndEffector.stl
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construction/v3_3dprinting_stl/MotorHorn.stl
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construction/v3_3dprinting_stl/MotorHorn.stl
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construction/v3_3dprinting_stl/MotorMount.stl
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construction/v3_3dprinting_stl/MotorMount.stl
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construction/v3_3dprinting_stl/RubberBandCollet.stl
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construction/v3_3dprinting_stl/RubberBandCollet.stl
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construction/v3_3dprinting_stl/WireFlexureMount.stl
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construction/v3_3dprinting_stl/WireFlexureMount.stl
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datasheets/TB6612FNG.pdf
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datasheets/TB6612FNG.pdf
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electronics/pcb_v1.2_fix.jpg
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electronics/pcb_v1.2_fix.jpg
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