logo
NOTICE:  This is the new PunchCAD forum. You should have received an email with your new password around August 27, 2014. If you did not, or would like it reset, simply use the Lost Password feature, and enter Answer as the security answer.
Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error
DIY CNC Machine (#4603)
Options
Go to last post Go to first unread
Previous Topic Next Topic
ZeroLengthCurve  
#1 Posted : Wednesday, November 28, 2012 8:58:21 PM(UTC)
ZeroLengthCurve

Rank: Senior Member

Joined: 5/15/2008(UTC)
Posts: 989

Thanks: 19 times
Was thanked: 37 time(s) in 25 post(s)
DIY CNC Machine


This is an old, well-finded, ended projrct on kickstarter. Have any of you seen it?

http://www.kickstarter.com/proj...cnc-machine?ref=category

Loks pret simple... Dremel, rig/jig, step motors, and some eectrnics/logic,
Back to top
ZeroLengthCurve  
#2 Posted : Wednesday, November 28, 2012 9:23:07 PM(UTC)
ZeroLengthCurve

Rank: Senior Member

Joined: 5/15/2008(UTC)
Posts: 989

Thanks: 19 times
Was thanked: 37 time(s) in 25 post(s)
Back to top
Krystyn  
#3 Posted : Thursday, November 29, 2012 1:17:18 AM(UTC)
Krystyn

Rank: Junior Member

Joined: 5/18/2012(UTC)
Posts: 5
Such projects are needed. It's the way to return material production to the west. Another and more original project: http://www.kickstarter.com/proj...c-gantry-router?ref=live
Back to top
m.marino  
#4 Posted : Friday, November 30, 2012 8:55:32 AM(UTC)
m.marino

Rank: Senior Member

Joined: 8/1/2011(UTC)
Posts: 102
Man
United Kingdom

Thanks: 2 times
Was thanked: 1 time(s) in 1 post(s)
The big problem with a lot of these is rigidity. great ideas and for light materials they will work. I would not try to cut aluminium with them as that is pretty much going to be scraping along not really cutting. Engraving, yes very useful but serious production ability, no.

The machine I have in the the gallery pictures can cut steel, not with that spindle though. Here is the rub of the matter, different materials require different cutting speeds and feeds and as such spindles have limits unless you start getting into serious industrial units.

There are options and possibilities but from what I am seeing of these units they will not stand up to heavy use. For production you need that durability.

Michael
SharkCAD Pro v10 w/ PowerPack Pro
Lenovo D20 2x E5620 w/ 64GB RAM, Nvidia 1060
OS: Windows 10 Pro x64
MM0MSU



Back to top
WWW
jol  
#5 Posted : Friday, November 30, 2012 9:01:14 AM(UTC)
jol

Rank: Senior Member

Joined: 2/26/2007(UTC)
Posts: 2,156

Was thanked: 1 time(s) in 1 post(s)
Having fought with the rigidity of big metal framed CNC machines - I frankly don't see this working well at all.
Back to top
blowlamp  
#6 Posted : Friday, November 30, 2012 9:20:46 AM(UTC)
blowlamp

Rank: Senior Member

Joined: 6/28/2008(UTC)
Posts: 648
It's a router, so it's mainly intended for cutting wood and sheet materials such as MDF.

Milling machines are for metal and have to be much, much more rigid.



Martin.
Back to top
m.marino  
#7 Posted : Friday, November 30, 2012 9:44:19 AM(UTC)
m.marino

Rank: Senior Member

Joined: 8/1/2011(UTC)
Posts: 102
Man
United Kingdom

Thanks: 2 times
Was thanked: 1 time(s) in 1 post(s)
Martin,

Depends on the build, I cut metal (aluminium, brass, bronze) with the current set up I have and IF I put a spindle on that would give me the low rpm's with torque that is needed, I could cut steel (modern coated carbide can be used without liquid coolant).

Other issues I see is the use of oil impregnated bearings in stress bearing members. The brass will deform under stress which will create play and with it the loss of proper fit and tolerances. Brass bushings can be used, don't get me wrong, it is just that they are a use and throw away item which has a defined lifespan and no adjustment possible.

When working with a custom build you really need to spec' out what you want to do with it, then over build by 20%. Most of these are honestly not much more then glorified geeks toys. The one out of wood with the dual Y axis giving support to the Zed is a very good design and made from stronger materials would serve very well to do production work. The rub with that unit is drive system an lack of protection for it from swarf. Other then a few minor issues it is a unit that could be built with the proper materials for cutting metal up to and including steel.

Michael
SharkCAD Pro v10 w/ PowerPack Pro
Lenovo D20 2x E5620 w/ 64GB RAM, Nvidia 1060
OS: Windows 10 Pro x64
MM0MSU



Back to top
WWW
L. Banasky  
#8 Posted : Saturday, December 1, 2012 4:54:20 AM(UTC)
L. Banasky

Rank: Senior Member

Joined: 2/16/2007(UTC)
Posts: 601

Thanks: 153 times
Was thanked: 149 time(s) in 102 post(s)
A helpful source for information on DIY CNC are the forums at:
http://www.cnczone.com/forums/
Larry
Back to top
Krystyn  
#9 Posted : Monday, December 3, 2012 1:11:13 AM(UTC)
Krystyn

Rank: Junior Member

Joined: 5/18/2012(UTC)
Posts: 5
m.marino you are absolutely right - rigidity is absolutely necessary in serious job. But everything starts somewhere. If you build your first machine from junk you will get basis understanding of how it works and what it can do. Next one will be better. I'm also building cnc machine. I don't use any plans so I've choosen metal construction which will probably be stronger than needed. Didn't finish yet but already have idea for bigger and even stronger machine and that one should earn money for me.
Back to top
Users browsing this topic
Guest
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.

Powered by YAF.NET 2.1.2 | YAF.NET © 2003-2024, Yet Another Forum.NET