Help with DIY hot wire cutter

prabal276 · July 19, 2015, 04:41:12 PM

Hey,
i plan to build a hot wire cutter i have a 12v dc adapter. it can also be switched to anything above1v.
can i just connect alligator clips to its ends and then connect it to nicrome wire?

??
thanks in adv.

medicineman1987 · July 19, 2015, 04:50:53 PM

Check out section 4 of my thread.. http://www.rcindia.org/self-designed-diy-and-college-projects/glidiator-my-first-trainer-build-log/

prabal276 · July 19, 2015, 05:35:17 PM

there are no amphs specified on mine . here is the info. slip of the adapter:
1.5 V. to 12 V.
Input 220 V AC.
OUTPUT CURRENT -500MA
MODEL no. HE AD 6602
and the there are two know to control voltage from 1.5v to 12v
and a polarity knob to select between +polarity and - polarity

prabal276 · July 19, 2015, 05:40:04 PM

i think ma is something related to amphs

medicineman1987 · July 19, 2015, 06:30:40 PM

500mA is 0.5A.

prabal276 · July 19, 2015, 07:28:21 PM

would it work??

rcrcnitesh · July 19, 2015, 07:36:18 PM

I don't think so. The wires length should be decreased or the width should be increased for it to work.
What charger do you have.

medicineman1987 · July 19, 2015, 08:43:26 PM

500mA is too little. Go get yourself a nice big transformer like I did. You can pull them out of old electronics. Go to some scrap electronics place and get it cheap.

medicineman1987 · July 19, 2015, 08:44:42 PM

Just use all the stuff I used. Its tried and tested. Multiple people have used my cutter since.

tantragna · July 19, 2015, 09:03:27 PM

I think you have the good old switchable power-supply from the 90's

mA is definitely the Current rating, ie., milli Amp(s) or Ampere(s) (not Amphs)

I am not very sure, if half Amp is sufficient to achieve the required heat to make a hot-wire cutter. Try a higher current rated p/s.

prabal276 · July 19, 2015, 09:05:57 PM

is there any transformer available online?

?
will this work i ll add a electric extension from the ac plug to the plug of the adapter and add a regulator in between.
would this work???
http://www.ebay.in/itm/291414319227?aff_source=Sok-Goog

rcrcnitesh · July 19, 2015, 10:56:33 PM

What charger do you have? If it's an b6 you can flash it with an open source firmware and use the hot wire functionality.

prabal276 · July 20, 2015, 06:58:13 AM

I have a b3ac

prabal276 · July 20, 2015, 07:01:01 AM

Wouldnt dc 12 volt and 2 amph work??

girishsarwal · July 20, 2015, 08:22:44 AM

Prabal you can also use a lead acid battery 12v, the one that goes in a ups or a bike. Ample of amperes for the job. If you have a b6 type charger, it can easily charge your battery

PS: most advertised 12v 2A like that used by WiFi routers would stall and not provide enough juice for the work.

K K Iyer · July 20, 2015, 01:03:45 PM

@prabal276,
You may find this of interest:
http://www.rcindia.org/self-designed-diy-and-college-projects/5th-sweepstakes-entry-diy-lipo-powered-hot-wire-cutter-k-k-iyer/

prabal276 · July 20, 2015, 02:24:18 PM

Cant you guys gimme a link to an adapter or a battery?
my studies dont gimme enough time to got out searching. I can olny manage ordering online.
what is an stall that you were talking about in the above post?