Hack Chat 0x03: Introduction to CNC Machining
Bit material: Router bits used in Shopbot are made from a variety of materials such as solid carbide, carbide-tipped steel, and high-speed steel.
Flute type: There are four basic flute types: Straight, spiral up-cut, spiral down-cut, and compression
Drill bit Vs Endmills: A drill bit needs to cut straight into the material hence will have teeth at tip. But an Endmill needs to cut from the sides also, that means it needs to have a cutting edge spiralling all the way up to the flute.
Upcut & Downcut
In an Upcut type end mill the teeth on the flute will point upwards. This means that the end mill is cutting and drawing out the wood through the flute. This is good for cutting deep into the stock. But this leaves a bad surface finish on the top of the surface.
A downcut type end mill has teeths that point downward on the flute. This means that the end mill will cut and try to push the material into the stock. This will give good surface finish on the top, but it is not very efficient at removing material.
flat end leaves flat surface profile on the stock and are good for removing large volume of material, but steps are formed when used for making curved surfaces. Ball end leaves curved surfaces and forms smooth curved finish while cutting cavities. They are used for finishing cuts.
@Suhailjr But I think since it's not a plug and plug play system and it will laying on the PCB for the long term, it might be fine. for me, it's similar to the Intel Edison and the PICO-IMX7 System-on-Module
@salmanfaris at last they update their design. T
What you think on the updated connector. I felt like its more fragile and high chance for corottion issue due to humidity for long term use.
Built on the same 64-bit quad-core BCM2711 application processor as Raspberry Pi 4, Compute Module 4 delivers a step-change in performance over its predecessors: faster CPU cores, better multimedia, more interfacing capabilities, and, for the first time, a choice of RAM densities and a wireless connectivity option.
You can find detailed specs here,1.5GHz quad-core 64-bit ARM Cortex-A72 CPU VideoCore VI graphics, supporting OpenGL ES 3.x 4Kp60 hardware decode of H.265 (HEVC) video 1080p60 hardware decode, and 1080p30 hardware encode of H.264 (AVC) video Dual HDMI interfaces, at resolutions up to 4K Single-lane PCI Express 2.0 interface Dual MIPI DSI display, and dual MIPI CSI-2 camera interfaces 1GB, 2GB, 4GB or 8GB LPDDR4-3200 SDRAM Optional 8GB, 16GB or 32GB eMMC Flash storage Optional 2.4GHz and 5GHz IEEE 802.11b/g/n/ac wireless LAN and Bluetooth 5.0 Gigabit Ethernet PHY with IEEE 1588 support 28 GPIO pins, with up to 6 × UART, 6 × I2C and 5 × SPI
Compute Module 4 IO Board
The IO board provides:Two full-size HDMI ports Gigabit Ethernet jack Two USB 2.0 ports MicroSD card socket (only for use with Lite, no-eMMC Compute Module 4 variants) PCI Express Gen 2 x1 socket HAT footprint with 40-pin GPIO connector and PoE header 12V input via barrel jack (supports up to 26V if PCIe unused) Camera and display FPC connectors Real-time clock with battery backup
Seeed is currently counting down for the 10 year anniversary of the debut of Grove . In the past 10 years, we have seen many wonderful projects created by Grove from our user and community. We want to invite you to join us to celebrate the 10 year anniversary of Grove 🤩.
In the Grove 10 Years Celebration, we’d like to collect the stories of “Grove with You”, which we want to invite our users to share their stories they have with Grove products.
=> What project you’ve made out of Grove?
=> What is your favourite Grove?
=> which one was the first Grove you’ve purchased?
Seeed encourages you to post and share photos, videos, stories of Grove in the Seeeed Forum, or any other platforms below that you’d like to use.
The following ways to find us, and tag #grove10 to share the project with us!
Feel free to be creative in documenting your projects–we will be selecting top 10 most “Grovy” winning entries from the submissions, and the winners will receive a $100 Grove Surprise Pack as a special gift.
Looking forward to seeing your projects! 🥳
@kowshik1729 I think that might not get since the platform is not opensource! but they provided everything you need to develop a system with that.