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Nichrome Wire
Posted by Adam.m.Nelson
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Nichrome Wire November 28, 2009 10:44AM |
Registered: 14 years ago Posts: 225 |
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Re: Nichrome Wire November 28, 2009 01:56PM |
Admin Registered: 17 years ago Posts: 1,915 |
Depends on how big your extruder barrel. We used to specify #31 AWG. In recent times, however, we've been looking at much longer lengths of glass insulated nichrome from Pelican Wire in heavier gauges like #27-28. The longer lengths lower the temperature on the surface of the nichrome and keep the insulation from perishing. I put together a Rapman 3 extruder head with #28 {7 ohms} and Kapton tape with JB-Weld securing the thermistor. It's been running without complaint for several weeks now. :-)
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Hell, there are no rules here - we're trying to accomplish something.
Opportunity is missed by most people because it is dressed in overalls and looks like work.
Thomas A. Edison
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Hell, there are no rules here - we're trying to accomplish something.
Opportunity is missed by most people because it is dressed in overalls and looks like work.
Thomas A. Edison
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Re: Nichrome Wire November 28, 2009 05:54PM |
Registered: 16 years ago Posts: 1,094 |
I don't think the length is particularly critical, although longer lengths allow you to spread the heat more evenly. The resistance of the length you choose however is directly related to the current that the wire consumes, and hence its heating power. A thinner gauge at a longer length simply spreads the same amount of heat over a larger area, so we specify resistance rather than gauge and length
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Re: Nichrome Wire December 01, 2009 08:38AM |
Registered: 14 years ago Posts: 225 |
, its on order now, thanks guys
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Re: Nichrome Wire December 14, 2009 11:02AM |
Registered: 14 years ago Posts: 83 |
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Re: Nichrome Wire December 14, 2009 11:07AM |
Registered: 14 years ago Posts: 225 |
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Re: Nichrome Wire December 14, 2009 11:23AM |
Registered: 15 years ago Posts: 264 |
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Re: Nichrome Wire December 14, 2009 11:28AM |
Registered: 14 years ago Posts: 225 |
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Re: Nichrome Wire December 14, 2009 12:58PM |
Registered: 14 years ago Posts: 83 |
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Re: Nichrome Wire December 14, 2009 01:17PM |
Registered: 14 years ago Posts: 225 |
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Re: Nichrome Wire December 14, 2009 11:13PM |
Registered: 16 years ago Posts: 1,094 |
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Re: Nichrome Wire December 14, 2009 11:42PM |
Registered: 14 years ago Posts: 225 |
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Re: Nichrome Wire December 15, 2009 12:35AM |
Registered: 16 years ago Posts: 1,094 |
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Re: Nichrome Wire December 15, 2009 09:29AM |
Registered: 14 years ago Posts: 83 |
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Re: Nichrome Wire April 21, 2010 05:00AM |
I'd also like to know if this alternative insulation works. My nichrome's insulation has come off and it would take too long to order a new one all the way to Japan...
At the wiki it says "...uninsulated wire should work as long as extra measures are taken to insulate the wires from each other. Kapton Tape or alternatively Teflon Tape is utilized for extra insulation." Has anyone tried using Kapton around the whole wire?
Thanks
At the wiki it says "...uninsulated wire should work as long as extra measures are taken to insulate the wires from each other. Kapton Tape or alternatively Teflon Tape is utilized for extra insulation." Has anyone tried using Kapton around the whole wire?
Thanks
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Re: Nichrome Wire April 21, 2010 05:19AM |
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Re: Nichrome Wire April 21, 2010 07:04AM |
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smaddox
Re: Nichrome Wire May 01, 2010 03:15AM |
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Re: Nichrome Wire May 12, 2010 12:37PM |
Registered: 14 years ago Posts: 83 |
I wouldn't advise that: the nichrome wire has to heat up to a temperature higher than the extrusion temperature, due to the thermal resistance of the barrel. That means that, for an extrusion temperature of 220C, you may have to heat the nichrome wire up to 270C, say. So you may degrade the teflon, even though the extruder works at a reasonable temperature.
The exact values will depend on your machine and are not straightforward to obtain. There may be some cases where this would not be an issue, but I would be careful with teflon, if I were you. It can be pretty toxic when it degrades.
The exact values will depend on your machine and are not straightforward to obtain. There may be some cases where this would not be an issue, but I would be careful with teflon, if I were you. It can be pretty toxic when it degrades.
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Re: Nichrome Wire May 16, 2010 05:52AM |
Registered: 16 years ago Posts: 15 |
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Re: Nichrome Wire May 20, 2010 02:09AM |
Registered: 13 years ago Posts: 78 |
alianmac Wrote:
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> Having trouble finding Nichrome 80 in the UK for a
> reasonable price, but several places on eBay sell
> Nichrome 60. Would that be a suitable
> alternative?
>
> Thanks
They should be similiar in performance. The only difference is the increase in length due to a smaller percentage of Nichrome.
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> Having trouble finding Nichrome 80 in the UK for a
> reasonable price, but several places on eBay sell
> Nichrome 60. Would that be a suitable
> alternative?
>
> Thanks
They should be similiar in performance. The only difference is the increase in length due to a smaller percentage of Nichrome.
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Re: Nichrome Wire May 20, 2010 12:36PM |
Registered: 15 years ago Posts: 199 |
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Re: Nichrome Wire June 02, 2010 05:08PM |
Registered: 14 years ago Posts: 60 |
Just thought i would mention, that you dont realy need nichrome with insulation, i bought mine off ebay! one layer of Kapton tape on the brass, wire rapped around thread, another layer of Kapton,and then wrap wire back over again, I currently have 150 ish print hours on this nozzle! and its hasnt missed a beat.
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