RC India

RC Equipments => Tools, Materials and Building Techniques => Topic started by: kamalsahai on September 08, 2015, 11:26:11 PM



Title: setting hot nichrome wire foam cutter-help needed
Post by: kamalsahai on September 08, 2015, 11:26:11 PM
bought two things
1.transformer 12volt 5 amp
2. nichrome wire

and joined electricity wire for input
 see picture
(http://)
but when i On my system it nichrome wire become red and melts

i think i have not installed dimmer kindly inform where to install dimmer or any suggestions
 kindly correct my hardware system
kp



Title: Re: setting hot nichrome wire foam cutter-help needed
Post by: madaquif on September 09, 2015, 12:17:45 AM
dimmer should be installed in AC mains...red wire


Title: Re: setting hot nichrome wire foam cutter-help needed
Post by: kamalsahai on September 09, 2015, 02:01:33 PM
give ur phone number

kp


Title: Re: setting hot nichrome wire foam cutter-help needed
Post by: SI74 on September 09, 2015, 09:33:21 PM
Hi, you need not buy any transformer for this. I used my laptop' s charger and connected it to the " E" string of guitar. Works perfectly.


Title: Re: setting hot nichrome wire foam cutter-help needed
Post by: K K Iyer on September 09, 2015, 09:52:10 PM
@madaquif,
dimmer should be installed in AC mains...red wire

Red wire?
You mean positive?
Is there one in AC?
Come on Aquif, let us not spread wrong ideas!


Title: Re: setting hot nichrome wire foam cutter-help needed
Post by: johnywalker8pm on September 09, 2015, 10:08:33 PM
Tata Sky power adapter works too with E string of guitar.

www.youtube.com/watch?v=U7z7xsQHJaM


Title: Re: setting hot nichrome wire foam cutter-help needed
Post by: K K Iyer on September 09, 2015, 10:14:32 PM
So does a lipo (2s or 3s)


Title: Re: setting hot nichrome wire foam cutter-help needed
Post by: kamalsahai on September 09, 2015, 11:30:47 PM
thanks every body

kp


Title: Re: setting hot nichrome wire foam cutter-help needed
Post by: VintageFlier on September 10, 2015, 04:13:54 PM
I would not use a LiPo for this!

Risk of damage to a costly LiPo and even worse, of Battery Fire.

This is because the chances of an accidental short-circuit are too high with these set-ups.



Title: Re: setting hot nichrome wire foam cutter-help needed
Post by: nitesh47 on September 11, 2015, 02:58:38 AM
Hi kamal,
you are going in the right way, transformer is perfect for cutting as it heats instantly after switch on. Few things to improve as mentioned above use guitar E string, and yes dont forget to add resistant on both the end of the wire.
I am using the transformer of an old UPS, aprx 5amp 14v, E string
working fine.


Title: Re: setting hot nichrome wire foam cutter-help needed
Post by: kamalsahai on September 11, 2015, 03:46:42 PM
thanks nitesh47

nichrome wire is too expensive, now i am looking for element wire

furhter if u know any online cheap source of nichrome wire let me know

kp


Title: Re: setting hot nichrome wire foam cutter-help needed
Post by: SI74 on September 11, 2015, 08:29:48 PM
But Laptop charger also heats up the E string instantaneously. I asked for the price of such  a transformer( built in a box with proper switch and insulation ) , it was 700rs. So I thought of using a charger instead.


Title: Re: setting hot nichrome wire foam cutter-help needed
Post by: nitesh47 on September 11, 2015, 09:30:49 PM
Bro u r right, laptop charger is  suitable.
 he already bought that transformer if he havnt then he could use the laptop charger.
regards nitesh47...