Author Topic: 6400 Dolmar  (Read 1233 times)

0 Members and 0 Guests are viewing this topic.

Offline aclarke

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172
Re: 6400 Dolmar
« Reply #30 on: February 09, 2014, 03:22:28 pm »
Anyone remember the non-limited flywheel positioning at TDC?  leading edge of magnet at leading edge coil @ tdc??   thk, Adam


Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6437
  • Karma: 249
  • For The Love Of Chainsaws
  • Location: NCO
Re: 6400 Dolmar
« Reply #31 on: February 09, 2014, 05:36:25 pm »
It should be at the point where the poles of the magnet leave the armature of the coil?
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline Cut4fun .

  • Administrator
  • Nitro Hotsaw
  • *******
  • Posts: 22574
  • Karma: 591
  • OHIO REDNECK Saw Repair Getter Done
    • Redneck Chainsaw Repair
Re: 6400 Dolmar
« Reply #32 on: February 09, 2014, 07:32:36 pm »
I've read about timing 2 different ways to do this. 1 was with a timing light and another with setting flywheel up like on the 3120 deal with 272 coil.  I cant find the pic yet, but sent the timing light light way in PM.
REDNECK Saw Repair Getter Done

Offline aclarke

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172
Re: 6400 Dolmar
« Reply #33 on: February 09, 2014, 08:07:52 pm »
Thanks!  Never tried the timing light method. I've used the method where the edge of the second coil pole is placed at the edge of the departing magnet (flywheel)  at least that's what I remembered from 5-6 years ago.  I degree'd the movement from where the flywheel magnet  is centered on the coil poles and it moves  28 degrees til the magnet departs the edge of the coil.  Would the point where the edge of the departing flywheel magnet be the point where the field collapses and spark occurs?

Offline aclarke

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172
Re: 6400 Dolmar
« Reply #34 on: February 09, 2014, 08:55:04 pm »
Useful Useful x 1 View List

Online 3000 FPS

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 4547
  • Karma: 291
  • Location: Carpenter, Wyoming
Re: 6400 Dolmar
« Reply #35 on: February 09, 2014, 09:34:42 pm »
Looks like good reading thanks.
PP 505, 475, 445.

Online 3000 FPS

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 4547
  • Karma: 291
  • Location: Carpenter, Wyoming
Re: 6400 Dolmar
« Reply #36 on: February 09, 2014, 10:18:08 pm »
I read through the theory of how the ignition works.   I have one question.

To turn on the darlington it uses one volt to forward bias it and allow current flow for the secondary.   

So to turn off the darlington it uses another one volt.   My question,  is this a negative one volt to reverse bias the darlington and shutting it off?
PP 505, 475, 445.

Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6437
  • Karma: 249
  • For The Love Of Chainsaws
  • Location: NCO
Re: 6400 Dolmar
« Reply #37 on: February 10, 2014, 12:45:55 am »
Picture
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline 660magnum

  • Global Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 6437
  • Karma: 249
  • For The Love Of Chainsaws
  • Location: NCO
Re: 6400 Dolmar
« Reply #38 on: February 10, 2014, 12:56:48 am »
Modification, construction, and timing of Husky 272 coil winding into a 7900 coil armature frame
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline aclarke

  • Nitro Hotsaw
  • *******
  • Posts: 1676
  • Karma: 172
Re: 6400 Dolmar
« Reply #39 on: February 10, 2014, 08:48:50 am »
much appreciated!!   makes it easy...thanks


 

Related Topics

  Subject / Started by Replies Last post
13 Replies
1443 Views
Last post January 02, 2012, 07:14:22 pm
by rms61moparman
1 Replies
1202 Views
Last post March 10, 2012, 07:00:24 am
by MCW
6 Replies
1004 Views
Last post June 30, 2017, 05:39:15 pm
by Philbert
7 Replies
72 Views
Last post February 05, 2014, 09:06:04 pm
by KilliansRedLeo
5 Replies
310 Views
Last post February 26, 2014, 08:33:13 pm
by Ducksnuff870
21 Replies
325 Views
Last post July 08, 2014, 03:01:08 pm
by Nathaniel Vansickle
0 Replies
170 Views
Last post July 03, 2014, 12:13:53 pm
by Cut4fun .
23 Replies
720 Views
Last post September 02, 2015, 09:40:26 pm
by Nathaniel Vansickle
35 Replies
321 Views
Last post January 27, 2016, 03:28:50 pm
by Cut4fun .
0 Replies
576 Views
Last post May 25, 2018, 09:23:42 am
by Cut4fun .