General > General Technical Chat
3-Axis precision mini CNC machine
xzswq21:
--- Quote from: PaulAm on August 22, 2021, 06:24:28 pm ---
--- Quote ---
Quote from: sokoloff on Today at 12:53:20 pm
If you want to build your own machine, I think the first step is to become familiar with a commercial machine (ideally a low-end and a mid-grade machine separately), spend a couple hundred hours making parts and chips, and see what they did and why.
and a CNC is great help when building a CNC
--- End quote ---
At the very least, access to a machine shop with decent quality manual machines (and the knowledge and experience to use them). If you don't know what you're doing, the only recourse is to pay somebody for their expertise and buy a machine or kit that meets your requirements.
One alternative is to get a cast iron bench mill drill (Chinese clones are all over the market) and then a refit CNC kit.. These things are > 1-300Kg, so not really that big as far as machines go. Find the refit kit first before you get the mill though.
The only constant here is that it's going to cost a fair amount of money. Precision and machining steel/stainless does not come cheap.
--- End quote ---
What do you think about this machine?
https://forsuncnc.com/mini-cnc-router-fs4040a/
They claimed "Cast steel table structure and side support, Aluminum gantry, aluminum T-Plate Extrusion Combined table" and "All the spare parts are a world-famous brand like Siemens controller from Germany, Yaskawa servo motors from Japan, Igus cable from Germany, ABB from Switzerland, and so on"..
But it's a Chinese company and I'm scared to rely on their specifications.
PaulAm:
Looks fine for wood or plastic.
Benta:
--- Quote from: PaulAm on August 22, 2021, 08:13:03 pm ---Looks fine for wood or plastic.
--- End quote ---
Yep. Quote from the description:
"Mainly used in the engraving, punching, and cutting of PVC, acrylic, two-color board, engineering plastics, etc."
Says it all.
Benta:
We should be a bit careful with metal-working machine terminology here:
A fixed flat-bed machine with moving gantry is a router.
A fixed-head machine with moving X-Y table is a mill.
Routers are mainly for engraving and contour cutting in soft materials. The whole construction principle does not allow for the rigidity needed for working in steel (unless you make it extremely massive).
A mill is a different story, and can basically be built to very high rigidity with little effort.
A very popular CNC mill setup in the hobby/prototyping scene is the Sieg SX2 with added CNC kit. The machine is from Shanghai, but good quality.
http://www.siegind.com/product_detail/sx2-mini-mill-drill-15008858857815262.html
The X2 is rigid enough for steel and SS using reasonably sized cutters (from experience: up to ø4 mm, with care ø6 mm).
Ready to bolt on CNC kits are available from several supplies, eg, Heavy Metal CNC or CNC Conversion Plus.
Downside to the Sieg SX2: the X/Y working envelope is just 100 mm x 220 mm.
But this is about as cost-effective as you will get.
xzswq21:
--- Quote from: Benta on August 22, 2021, 09:09:30 pm ---We should be a bit careful with metal-working machine terminology here:
A fixed flat-bed machine with moving gantry is a router.
A fixed-head machine with moving X-Y table is a mill.
Routers are mainly for engraving and contour cutting in soft materials. The whole construction principle does not allow for the rigidity needed for working in steel (unless you make it extremely massive).
A mill is a different story, and can basically be built to very high rigidity with little effort.
A very popular CNC mill setup in the hobby/prototyping scene is the Sieg SX2 with added CNC kit. The machine is from Shanghai, but good quality.
http://www.siegind.com/product_detail/sx2-mini-mill-drill-15008858857815262.html
The X2 is rigid enough for steel and SS using reasonably sized cutters (from experience: up to ø4 mm, with care ø6 mm).
Ready to bolt on CNC kits are available from several supplies, eg, Heavy Metal CNC or CNC Conversion Plus.
Downside to the Sieg SX2: the X/Y working envelope is just 100 mm x 220 mm.
But this is about as cost-effective as you will get.
--- End quote ---
:) Thanks
Do you know a precision lathe machine? I want to buy a Proxxon PD 250/E, it's 1600$ with the accessories.
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