CNC Router

Moderators: PK, Moderators

User avatar
cryoscum
STOP... Hammer Time The Prodigy
STOP... Hammer Time    The Prodigy
Posts: 1802
Joined: Wed Oct 06, 2010 2:54 pm
Location: QLD, NSW & VIC

CNC Router

Postby cryoscum » Tue Dec 18, 2012 11:01 am

I've been needing a CNC router for a while and, in a moment of weakness, Captain Awesome agreed to sell me the one he built some years ago. He no longer needs it after he recently upgraded to one that's literally the size of a car.

After some screwing around with the setup (controller HDD crash and some urgent cloning to a new drive), the setup was complete and I could do the test run. Decided on doing something with a few curves in it and with some nostalgia :)
1.JPG

2.JPG

3.JPG



Little Pacman ghosts are OK, but perfect and handsfree creation of fins and centering rings are more to the point. It cuts aluminium, G10 and any of my own composites without hassles too...

Cheers
Nic
AMRS L3 | NAR L3 | QRS 089 | MDRA 224
AMRS Technical Advisory Group

Total impulse for 2016: 32,458 Ns (thus far)
Total impulse for 2015: 84,231 Ns
Total impulse for 2014: 40,757 Ns
Total impulse for 2013: 62,927 Ns

krusty
Engineer
Engineer
Posts: 1306
Joined: Tue Nov 27, 2007 12:21 pm
Location: Noble Park, Vic, Australia
Contact:

Re: CNC Router

Postby krusty » Tue Dec 18, 2012 12:37 pm

Very nice :)

Krusty

User avatar
CATO
Mr Smiley
Mr Smiley
Posts: 1958
Joined: Thu Dec 24, 2009 6:20 pm
Location: Sydney, NSW
Contact:

Re: CNC Router

Postby CATO » Tue Dec 18, 2012 4:37 pm

cryoscum wrote:I've been needing a CNC router for a while and, in a moment of weakness, Captain Awesome agreed to sell me the one he built some years ago

I have a new best friend.....
"In thrust we trust"

AMRS 21 L3
TRA 07459 L3

Impulse:
2018: 14,767 Ns (44% N)
Ns 17: 5,973; 16: 34,558; 15: 35,955; 14: 6,016; 13: 10,208
PB - Gorilla N2717WC, H: 10,260', S: 1.14M

Space Mark
Juicy Fruit
Juicy Fruit
Posts: 400
Joined: Mon Apr 18, 2011 11:57 am
Location: Perth, WA
Contact:

Re: CNC Router

Postby Space Mark » Wed Dec 19, 2012 12:11 pm

Wow Nic, I'm surprised you didn't have one before. CNC Router has to be the single best tool i have for rocketry. Being able to knock out a set of centring rings in a minute or two is just awesome, nevermind airfoiled fins that don't need sanding!

Seeing as you've been building such amazing rockets without one, I can't wait to see what you come up with now you have a router.
TRA 13845 - Level 3

User avatar
cryoscum
STOP... Hammer Time The Prodigy
STOP... Hammer Time    The Prodigy
Posts: 1802
Joined: Wed Oct 06, 2010 2:54 pm
Location: QLD, NSW & VIC

Re: CNC Router

Postby cryoscum » Thu Dec 20, 2012 6:39 pm

Some other bits that are hard to make by hand - rings to center a 54mm dynawind mandrel on a 40mm dia alu pipe. The rings are from simple 19mm yellow tongue flooring and only 4mm wide.
1.JPG
1.JPG (32.83 KiB) Viewed 4424 times


Time for something a bit more challenging and also to just clock some hours on the machine. From what I understand a Turner's Cube is usually made as some sort of test of proficiency by machinists, but I just like the look of it.
Started off by modelling it to get the proportions and overall look right:
2.JPG
2.JPG (34.5 KiB) Viewed 4424 times


Then made a 40mm cubed block of good quality Jarrah, with all faces milled and the whole thing squared up. Surprisingly time consuming!
3.JPG


The next step is to mill the crap out of it:
4.JPG


And the final product:
5.JPG
5.JPG (24.94 KiB) Viewed 4424 times


The router's accuracy and ability for 'finesse' is very good. I now concider it comissioned and ready for more serious tasks...
AMRS L3 | NAR L3 | QRS 089 | MDRA 224
AMRS Technical Advisory Group

Total impulse for 2016: 32,458 Ns (thus far)
Total impulse for 2015: 84,231 Ns
Total impulse for 2014: 40,757 Ns
Total impulse for 2013: 62,927 Ns

krusty
Engineer
Engineer
Posts: 1306
Joined: Tue Nov 27, 2007 12:21 pm
Location: Noble Park, Vic, Australia
Contact:

Re: CNC Router

Postby krusty » Thu Dec 20, 2012 6:55 pm

Very nice :) You're going to have a lot of fun with that!

And I know before too long you're going to be saying to yourself "How did I ever get on without this??"

Krusty

User avatar
ROCKet STAR
Astronaut
Astronaut
Posts: 1724
Joined: Mon Mar 16, 2009 1:40 pm
Location: Blue Mountains, NSW
Contact:

Re: CNC Router

Postby ROCKet STAR » Fri Jan 04, 2013 1:40 pm

I'm thinking about buying/building a CNC router myself. Do you guys that are in the know reckon that the more powerful, water cooled spindles toke this are a worthwhile investment over the cheap, air cooled spindles? I have spent a bit of time using one of the cheap Chinese 3040 routers with an air cooled spindle, and it seemed to not have any trouble, with the cuts I was taking, though I was being fairly conservative with feed rates and depths of cut.
Chris Barnes

AMRS# 29 - L3

UKRA - L3

User avatar
cryoscum
STOP... Hammer Time The Prodigy
STOP... Hammer Time    The Prodigy
Posts: 1802
Joined: Wed Oct 06, 2010 2:54 pm
Location: QLD, NSW & VIC

Re: CNC Router

Postby cryoscum » Fri Jan 04, 2013 4:30 pm

PK should comment, but I believe watercooled is the answer everytime. May even have a spare for you...
AMRS L3 | NAR L3 | QRS 089 | MDRA 224
AMRS Technical Advisory Group

Total impulse for 2016: 32,458 Ns (thus far)
Total impulse for 2015: 84,231 Ns
Total impulse for 2014: 40,757 Ns
Total impulse for 2013: 62,927 Ns

PK
...
...
Posts: 1710
Joined: Sun Jun 01, 2008 5:07 pm
Location: Perth
Contact:

Re: CNC Router

Postby PK » Sat Jan 05, 2013 9:29 am

ROCKet STAR wrote:I'm thinking about buying/building a CNC router myself. Do you guys that are in the know reckon that the more powerful, water cooled spindles toke this are a worthwhile investment over the cheap, air cooled spindles? I have spent a bit of time using one of the cheap Chinese 3040 routers with an air cooled spindle, and it seemed to not have any trouble, with the cuts I was taking, though I was being fairly conservative with feed rates and depths of cut.


The advantage of water cooling over air cooled is that its a bit quieter.
For a small, light (ie home made) machine, it’s worth shopping around for a small spindle. I built this one and the spindle can take cuts to the limit of the rigidity of the machine (ie 0.5-1mm in Al with a 6mm cutter at 2m/min, 3-5mm with the same cutter in plastic at 3-4m/min) and doesn’t come close to using its meagre 800W capacity. It removes metal at about the same rate as my (slightly modified) X3 milling machine.

The real advantage of these spindles on small machines is the rotational speed.
At low speeds (like <10KRPM) the cutting edge hits the work at a frequency low enough to induce resonance in the structure of the machine. It’s this resonance that hurts you. Go faster (most of the Chinese spindles will do 25KRPM) and this doesn't happen. The effect is profound.
PK

I'm awesome!

User avatar
ROCKet STAR
Astronaut
Astronaut
Posts: 1724
Joined: Mon Mar 16, 2009 1:40 pm
Location: Blue Mountains, NSW
Contact:

Re: CNC Router

Postby ROCKet STAR » Sat Jan 05, 2013 11:28 am

Thanks for the info, it sounds in that case that it would be very worthwhile. Quiet is good, and I hadn't even considered the issue of resonance being induced at low spindle speeds. I'll add the water cooled spindle to the list of "must have" features.
Chris Barnes

AMRS# 29 - L3

UKRA - L3

User avatar
SpaceManMat
Astronaut
Astronaut
Posts: 2076
Joined: Mon Dec 15, 2008 9:56 pm
Location: Brisbane

Re: CNC Router

Postby SpaceManMat » Tue Nov 18, 2014 10:07 pm

Space Mark wrote:Wow Nic, I'm surprised you didn't have one before. CNC Router has to be the single best tool i have for rocketry. Being able to knock out a set of centring rings in a minute or two is just awesome, nevermind airfoiled fins that don't need sanding!

Seeing as you've been building such amazing rockets without one, I can't wait to see what you come up with now you have a router.


Can you guys produce diamond airfoils like the ones on the Space Cowboy? Those things are way awesome :P

http://www.baddazzrocketry.com/BAR/SpaceCowboy.html
QRS: 124
AMRS: 32 L2 RSO
Highest Altitude: 13,647 feet
Fastest Flight: Mach 1.55
Largest Motor: CTI 1115J530 IM
Current Project: X Wing


Return to “Whooshtronics”

Who is online

Users browsing this forum: No registered users and 1 guest