something very interesting happened when cutting a bearing with an angle grinder: [youtu.be] roland, the little physicist :-) https://reprap.org/forum/read.php?2,418839,418839#msg-418839 Fri, 12 Jun 2026 13:23:39 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?2,418839,432587#msg-432587 https://reprap.org/forum/read.php?2,418839,432587#msg-432587
But I'm not sure its a viable printing method as its a bit like hot metal spraying in that if it will join the surface its joining to is usually cherry red from the hot particles before. To keep al whole print red hot may be unrealistic.

The other problem is the grindstone will where down and be throwing its unwanted particles in to the mix.

I'm hoping to be able to restart my cold metal spraying project as I'm getting a new job so may finally have time and money to set up a workshop for playing with this stuff.]]> Madkite Developers Sat, 15 Nov 2014 10:59:50 -0500 https://reprap.org/forum/read.php?2,418839,426887#msg-426887 https://reprap.org/forum/read.php?2,418839,426887#msg-426887 A2 Developers Sat, 01 Nov 2014 10:17:17 -0400 https://reprap.org/forum/read.php?2,418839,420121#msg-420121 https://reprap.org/forum/read.php?2,418839,420121#msg-420121
But as i too have some fiber-lasers (not to mismatch with fibercoupled IR-diodes!) with powers up to 120 Watts and spot sizes down to 5 microns, I'm using them instead of the IR-diodes ... so my methodes aren't portable to the common DIY developments :S]]> VDX Developers Thu, 16 Oct 2014 04:31:40 -0400 https://reprap.org/forum/read.php?2,418839,419800#msg-419800 https://reprap.org/forum/read.php?2,418839,419800#msg-419800
i said 'Metal Powder and Laser beam FTW'

"For The Win." An enthusiastic emphasis to the end of a comment

i said as a broad statement as i really like the concept of 3d metal printing.

in no way sarcastic]]> pushthatbolder Developers Wed, 15 Oct 2014 10:28:51 -0400 https://reprap.org/forum/read.php?2,418839,419696#msg-419696 https://reprap.org/forum/read.php?2,418839,419696#msg-419696 vreihen Developers Wed, 15 Oct 2014 07:03:27 -0400 https://reprap.org/forum/read.php?2,418839,419633#msg-419633 https://reprap.org/forum/read.php?2,418839,419633#msg-419633
And how do you create metal powder ???
And how much more expensive is a laser beam that can melt the powder in comparisen with an angle grinder ?

First two rules: you do not ask questions.
But also first two rules: you always speak yes.

it won't work with aluminium because it is to soft to be heated up.
That my indeed be the explanaition why i first observed this effect when cutting hard bearings.

someone of you might be happy to test whether such a flow of glowing iron particles can be bent with an electric magnet..

this all is only a possible beginning.

roland,
the little physicist :)]]> roland Developers Wed, 15 Oct 2014 04:32:14 -0400 https://reprap.org/forum/read.php?2,418839,419388#msg-419388 https://reprap.org/forum/read.php?2,418839,419388#msg-419388 As for steel printing. Metal powder and laser beams FTW.]]> pushthatbolder Developers Tue, 14 Oct 2014 12:31:54 -0400 https://reprap.org/forum/read.php?2,418839,419317#msg-419317 https://reprap.org/forum/read.php?2,418839,419317#msg-419317
Perhaps it's so solid in this case because grinding hardened steel produces very small chips, which sinter better.]]> Traumflug Developers Tue, 14 Oct 2014 09:58:34 -0400 https://reprap.org/forum/read.php?2,418839,419288#msg-419288 https://reprap.org/forum/read.php?2,418839,419288#msg-419288 VDX Developers Tue, 14 Oct 2014 08:01:20 -0400 https://reprap.org/forum/read.php?2,418839,419268#msg-419268 https://reprap.org/forum/read.php?2,418839,419268#msg-419268 vreihen Developers Tue, 14 Oct 2014 07:18:30 -0400 https://reprap.org/forum/read.php?2,418839,418839#msg-418839 https://reprap.org/forum/read.php?2,418839,418839#msg-418839 youtu.be]

roland, the little physicist :-)]]> roland Developers Mon, 13 Oct 2014 09:51:14 -0400