63d960f8a5
Changed Buck converter from adjustable to 5V fixed to prevent accidental damage to the Pico
77 lines
5.8 KiB
Markdown
77 lines
5.8 KiB
Markdown
# Bill of Materials (BOM)
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## Mechanics
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| Name | Qty | Description | Comments | Suggested link | Image |
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|------|-----|-------------|----------|----------------|-------|
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| Steel ball | 12 | Ø1 mm (0.04") | Precision G10 or better. Can be sourced from small ball bearings | |
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| PU stretch cord | 1 m | Ø1mm | e.g. "Stretch Magic" or "Magic String" | [Aliexpress](https://www.aliexpress.us/item/3256805953910514.html)| |
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| Neodym Cylinder Magnet | 70 | Ø3mm h=5 mm | N52 Grade | [NeoMagnets](https://www.buyneomagnets.com/p/3mm-dia-x-5mm-thick-n52-neodymium-rare-earth-disc-magnets-100-pack/)|
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| Brass Pipe | 1 m | OD=Ø2mm ID=Ø1 mm | | [Amazon](https://a.co/d/1pRFmtf)| |
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| M2-8 dowel | 9 | | | | |
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| SHCS M2-8 | 9 | | | | |
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| Set Screw M3-6 | 3 | | | | |
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| FHCS M3-6 | 3 | | | | |
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| FHCS M3-10 | 9 | | | | |
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| FHCS M3-20 | 12 | | | | |
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| Crimp Beads | 12 | | Used to affix the ends of the PU cord | | |
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## Electronics
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| Name | Qty | Description | Comments | Suggested link | Image |
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|------|-----|-------------|----------|----------------|-------|
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| DC-DC Step Down Module | 1 | 5V Fixed Output Step-Down Buck Converter | | [Aliexpress](https://www.aliexpress.com/item/1005008257960729.html)| |
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| (1N5819) OR (PMEG4010) | 1 | Diode (through-hole or SMD) | | |
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| Raspberry Pi Pico 2 | 1 | Microcontroller board | | | |
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| MT6835 Magnetic Encoder Module | 3 | Magnetic encoder | | [Aliexpress](https://www.aliexpress.us/item/3256808005140674.html)| |
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| TB6612FNG Driver | 3 | | | [Aliexpress](https://www.aliexpress.us/item/3256806060073976.html)| |
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| 470 µF Electrolytic Capacitor | 3 | > 100 µF | anything > 100µF will work well | |
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| 10 µF Ceramic Capacitor 0603 | 3 | Optional | | |
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| 4.7 k Resistor 0603 | 2 | Optional | | |
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| NEMA 17 Stepper Motor | 3 | Body ≤ 38 mm | Body length <= 38mm | |
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| JST XH2.54 4P connector | 3 | 4P Housing & Header 2.54mm pitch | J1, J2, J3 (motors) | [Aliexpress](https://www.aliexpress.com/item/1005007080333485.html?spm=a2g0o.order_list.order_list_main.53.3d5d1802JZg5Wb) |  |
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| XT60H Connector | 1 | 2P Male & Female pair 7.5mm pitch | Power connector | [Aliexpress](https://www.aliexpress.com/item/1005007605928815.html?spm=a2g0o.order_list.order_list_main.409.3d5d1802JZg5Wb) |  |
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| PH2.0 4P Housing <br> PH2.0 8P Housing | 1 <br> 1 | 4P 2mm pitch Housing <br> 8P 2mm pitch Housing | J5 (tool/I2C)<br> J4 (encoders) | [Aliexpress](https://www.aliexpress.com/item/1005010491403413.html?spm=a2g0o.order_detail.order_detail_item.3.2b60126a5SMahl) |  |
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| PH2.0 4P Header <br> PH2.0 8P Header | 1 <br> 1 | 4P 2mm pitch Header <br> 8P 2mm pitch Header | J5 (tool/I2C) <br> J4 (encoders) | [Aliexpress](https://www.aliexpress.com/item/1005010491403413.html?spm=a2g0o.order_detail.order_detail_item.3.2b60126a5SMahl) |  |
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## PCBs
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| Name | Qty | Description | Comments | Image |
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| ------------------- | --- | ----------- | -------- | ----- |
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| Control Board | 1 | | | |
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| balljoint_plate_pcb | 6 | | | |
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## 3D Printing
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| Name | Qty | Description | Comments | Image |
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| ------------------- | --- | ----------- | --------------------------------------------------------------- | -------------------------------------------------- |
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| Motor Horn | 3 | | 0.4 mm+ nozzle may require post-processing |  |
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| RubberBandCollet | 12 | | 0.4 mm nozzle, 0.1mm Layer height + may require post-processing |  |
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| Motor Mount | 3 | | |  |
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| End Effector | 1 | | |  |
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| Base Block | 1 | | |  |
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# Tool - Rod Sharpener
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## 3D Printing
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| Name | Qty | Description | Comments | Image |
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| ------------- | --- | ----------- | -------- | ----- |
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| Rod Guide | 1 | | | |
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| Blade Carrier | 1 | | | |
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# Tool - Rod Length Setting Press
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## PCBs
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| Name | Qty | Description | Comments | Image |
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| ----------------------- | --- | ----------- | -------- | ----- |
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| ball_alignment_disc_pcb | 1 | | | |
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## 3D Printing
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| Name | Qty | Description | Comments | Image |
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| ----------------------- | --- | ----------- | -------- | ----- |
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| RodGrindingJigA | 1 | | | |
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| RodGrindingJigB | 1 | | | |
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| RodGuide | 1 | | | |
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| RodCollet | 2 | | | |
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| CaliperClamp | 2 | | | |
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