hmmm hard times !!! prooof is in the pudding i bet you cant wait until the glue dries 🙂 ooooh curious 🙂
It is the corrugated layer you find within a cardboard. Once you rip off the top layer, you can find it.
Last edited:
Fail. Major. While setting pressure on the 4th magnet it came to rest on one of the ridges and snapped. Not only did no 4 break but also no 2 on the opposite side. Thats a bit of a problem as I don't undertand how I can get rid of the magnet... This is a bit challenging on the kitchen floor. But I'm not giving up just taking a bit of a break. Have now 4 broken magnets. Need also guides in the other direction but this is a bit trickier...
But this is all very good as I plan to make also shorter ribbons 😉
But this is all very good as I plan to make also shorter ribbons 😉
Attachments
Last edited:
Perhaps you should first try ferrite magnets.. you can probably get a feel for the forces involved, device a way to work around them and then play with neos.
Here are five very powerful magnets more or less safely handled, ready to be slid off to another location.
The poles of the magnets are all oriented the same--therefore they tend to repel on the steel backing (which is 3/16 inch thickness). General rule is that the back side of the steel plate should not be very magnetic--this implies that it is short-circuiting most if not all of the magnetic lines of force. That is why it is safer. Obviously disaster can still strike if you get something above the magnets and drop down. That is what common-sense is for.
The poles of the magnets are all oriented the same--therefore they tend to repel on the steel backing (which is 3/16 inch thickness). General rule is that the back side of the steel plate should not be very magnetic--this implies that it is short-circuiting most if not all of the magnetic lines of force. That is why it is safer. Obviously disaster can still strike if you get something above the magnets and drop down. That is what common-sense is for.
Attachments
![IMG_0684[1].jpg](/community/data/attachments/472/472284-f8183d3679deeb5606eb89174e1f67bb.jpg?hash=-Bg9Nnne61)
From the local hobby store...
Wellpapp natur 50 cm/2 m - Papper & stämplar för pysslaren
Finewell...
//
Root Cause Analysis: The guide jig I made did not support the structure all the way out in the ends. So when force was applied here, the 2 mm gap broke the magnets. Clumsy, hasty....
http://www.diyaudio.com/forums/atta...n-geriitts-reductio-ad-minimum-ribbon-ils.jpg
http://www.diyaudio.com/forums/atta...n-geriitts-reductio-ad-minimum-ribbon-ils.jpg
OK the thing came out of the jig in one piece. Then this morning I performed the test I had promised myself - the kitchen floor (soft mat) 50cm drop test. It survived the first gentle 30 cm but at 1/2 meter, 2 magnets on the same side ... changed side 🙂 ...in halfs.
So now I have learned a lot and need to start do things really correct e.g. use not 5 min Epoxy but the real stuff.
But now I'm confident in placing and clamping magnets so thats good :-D
I will now take a few days rest from this endeavor.
//
So now I have learned a lot and need to start do things really correct e.g. use not 5 min Epoxy but the real stuff.
But now I'm confident in placing and clamping magnets so thats good :-D
I will now take a few days rest from this endeavor.
//
Attachments
Last edited:
Yes - I wanted to know that it will not blow in my face trying to align these ribbons with my nose 5 cm from the driver 🙂
What do you all think - should it pass this test - is it reasonable?
//
What do you all think - should it pass this test - is it reasonable?
//
usually those hard glue's are not that shock resistant. if you want to redo the test look for a glue that is 🙂
i dont think it must be able to fall. i mean even magnets from loudspeakers come of if you let the cabinet fall. just wear some safety goggles when aligning cant hurt you 🙂 but does save you soem time and money 🙂
i dont think it must be able to fall. i mean even magnets from loudspeakers come of if you let the cabinet fall. just wear some safety goggles when aligning cant hurt you 🙂 but does save you soem time and money 🙂
I Dont know, i have no clue. Impact resistance you neef for your test 😉 , neodymium are hard to adhire there surface Is so smooth, and it's under tension permanent. I used cyanoacrylate glue but that's sucks to. hit it an they will come appart. I chose this for a reason so I did not have to throw away everything when I wanted to try something different. I think epoxy is pretty common to use. Just don't throw with it 🙂
- Status
- Not open for further replies.