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CNC Owners I have a few questions?

post #1 of 7
Thread Starter 
Ok so ive been wanting to get a CNC machine for a while now, I kind of got distracted though & went off mining altcoins etc rolleyes.gif

however im looking @ getting one of these http://www.ebay.co.uk/itm/New-Upgrade-4-AXIS-CNC-6040-ENGRAVER-DRILLING-AND-MILLING-MACHINE-With-VFD-/171015557320?pt=UK_BOI_Metalworking_Milling_Welding_Metalworking_Supplies_ET&hash=item27d15250c8

not sure I need the 4th axis but I guess it doesn't hurt to have that option right.

I think I got everything down on how to actually use it? well at least on 3 the axis's anyway wink.gif

im using aspire to create toolpaths/G-code & will use mach 3 obviously to run the G-code.

Now for some questions if anyone can answer them for me that would be great thumb.gif

1- will aspire make the spindle's rpm's fixed in the G-code, or can I override that in mach 3?

2- How well would this machine work on say copper billet if I implemented some sort of small water or lubricant table for it?

3- Does anybody know of any good places for tips & settings on different materials for these machines?

4- How long do these CNC's last before something on them craps out?

Hopefully someone on here will be able to answer some of these Q's biggrin.gif
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The Hot Minion
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post #2 of 7
Thread Starter 
THE BASE


THE BASE TOPSIDE


THE JET PLATE


THE ACRYLIC TOP


THE TOP INSIDE


ALL LAYERS





Obviously this is just a rough idea atm.

I have done some toolpaths but they will all need tweaking for whatever material is used & after some testing rolleyes.gif

ive got some real great ideas for some mobo/cpu/gpu blocks, all interconnected by 2 part acrylic channels. its hard to explain

but something like this!


obviously though this is just all concepts at the moment, I need a digital caliper/CNC & the tapping tools. rolleyes.gif

anybody who does have a cnc here maybe you could look over some of my stuff as I do them & help me out a little thumb.gif
Edited by korruptedkaos - 3/17/14 at 8:56am
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post #3 of 7
I just started learning more about CNC machines since my buddy got me involved in a local hackerspace but I wanted to mention that for DIY stuff, the Shapeoko 2 is a cheaper alternative & really popular, so there's a whole big community that can help you troubleshoot, etc.

https://www.inventables.com/technologies/desktop-cnc-mill-kit-shapeoko-2


Edited by TheBloodEagle - 3/20/14 at 2:59am
post #4 of 7
Thread Starter 
hey, thanks for the reply.

although that machine looks a little small & I don't think it will handle what plans I have really.

im actually just going to get the 3 axis 6040 I think for now. don't think I need the 4th axis tbh,
one thing I have come across is that the wiring is pretty poor on these machines but can easily be fixed by rewiring the motors.

going to be ordering it next week I think.

ive never really used a cnc before, but when it comes to figuring stuff out like this im not that bad once I get into it. I will just have to do some testing first I think.

atm I really cant do much in the way of making anything ready for when it comes. I need to get some tools & test materials together first.

so far ive found a couple of places for copper billet/bars & allsorts of plastics, plus a place for gaskets.

The one thing im struggling with atm is where can I find copper billet/bars big enough for Graphics cards.
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The Hot Minion
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CPUMotherboardGraphicsRAM
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CoolingCoolingCoolingOS
EK Coolstream 240 Alphacool D5 with HF Top 2x EK 7990 SE alcatel/nickel blocks Win7 ultimate 
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24'' AOC 1080p x3 + 42'' LG 3DTV saitek eclipse enermax revolution 1050w nzxt switch 810 
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post #5 of 7
That's 2/3 of all my research normally, finding a reasonably inexpensive supply of materials and sorting out the proper tooling.

My machine:
https://probotix.com/FireBall_Comet_cnc_router/


I'm running a Porter Cable 892 (2.25HP) with a set of low TIR collets. Fantastic little machine, basically plug and play out of the box.
post #6 of 7
Thread Starter 
Quote:
Originally Posted by TLHarrell View Post

That's 2/3 of all my research normally, finding a reasonably inexpensive supply of materials and sorting out the proper tooling.

My machine:
https://probotix.com/FireBall_Comet_cnc_router/


I'm running a Porter Cable 892 (2.25HP) with a set of low TIR collets. Fantastic little machine, basically plug and play out of the box.

cool biggrin.gif

just looked at a couple of your bits you've made in your albums.

do you flame polish your edges? they look really clean anyway thumb.gif

getting everything I need is turning into a bigger & bigger shopping list rolleyes.gif

cant wait to get it though & put it to use.

have you ever tried any metals on yours? I figure as long as I do enough passes in say 0.5mm steps it will be ok. im thinking of adding a little water tray of some sort to help keep the bits cool.
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2x 120gb mushkin chronus SAMSUNG DVDRW EK SUPREME HF+ 360+240 rad win7 ultimate 
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The Hot Minion
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THE DON MINION
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Grandpa Minion
(11 items)
 
CPUMotherboardGraphicsRAM
i7 3770k x47 1.288v e1 Asrock z77 extreme6 2x XFX 7990 Quadfire 16gb gskill 1866 
Hard DriveOptical DriveCoolingCooling
2x Corsair force 3 120GB pioneer dvdrw/bdrw XSPC Raystorm EK Coolstream 360  
CoolingCoolingCoolingOS
EK Coolstream 240 Alphacool D5 with HF Top 2x EK 7990 SE alcatel/nickel blocks Win7 ultimate 
MonitorKeyboardPowerCase
24'' AOC 1080p x3 + 42'' LG 3DTV saitek eclipse enermax revolution 1050w nzxt switch 810 
Audio
Xifi titanium 
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i7 4790k 4.7ghz MSI Z87 GD65  3x XFX R9 280x GSKILL 16GB DDR3  
Hard DrivePowerCase
2x 240GB Corsair 3 SSD EVGA 1000w P2 Corsair carbide 540 air 
CPUMotherboardGraphicsRAM
i7 920 @ 4.0ghz Asrock X58 Extreme fully WC 3x XFX R9 280X 3GB 16GB GSKILL 1600mhz 
Hard DriveOptical DriveCoolingOS
2x 120gb mushkin chronus SAMSUNG DVDRW EK SUPREME HF+ 360+240 rad win7 ultimate 
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3x aoc's through kvm's CORSAIR TX850M RC1000 COSMOS 
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post #7 of 7
Remember that these things will throw dust and chips far and wide. Same goes with coolants. For cutting metals, the correct cutters is extremely important, and use of a coolant (likely spray on by hand with a spray bottle) will be needed. These machines don't have something like a flood coolant to keep things really cool, so there's a fine edge to walk as far as taking big enough chips to carry off the heat and pushing too hard and breaking a cutter. Tool specifications will give you recommended chip loading. I haven't resorted to cutting metals on mine yet. Still getting used to the machine, sorting out parts holding methods, and doing a lot of acrylic stuff. I've been wanting to move up ti custom blocks though. That would be awesome fun to do.

I also have a laser cutter, so that naturally will leave a shinier edge (although it shows a bit of a ripple from the stepper motors). I don't usually bother sanding and polishing unless it's something like the SLI bridge cover where it's out in the open. Power supply covers I don't bother since the edges are up against other things. And I do flame polish. It's quick and easy. Sanding pad at 200 grit, a quick run with a 400 grit sanding stick and then toast it a few times until it's glossy.
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