Should you have any questions relating to the Vincent H.R.D. Owners Club, or Vincent H.R.D. motorcycles in general, please contact Graham Smith, Hon. Editor and Webmaster by calling 07977 001 025 or please CLICK HERE.
You are unrecognised, and therefore, only have VERY restricted access to the many features of this website.
If you have previously registered to use this forum, you should log in now. CLICK HERE.If you have never registered to use this website before, please CLICK HERE.
Ray, I don't have an answer about brushes, but stepper motors are brushless and when used as "generators" (alternators) produce alternating current which has to be rectified (more magic) to become direct current as we need. To operate as motors, they most often use DC -- though some run on AC.If these are brushed ac motors I suspect the brushes are set in the neutral plane. If they are dc brushed motors with a nominated DOR then their brushes would be offset opposite to the DOR to counter for armature reaction. If they are reversible dc motors they would be neutral again. So, if set as a generature the motors armature reaction would be opposite to that of a motor. Without the offset as a generator, voltage and therefore current would not be optimal? Just saying
I agree Bill it fills the gap where the rear cylinder was on the twin its a nice functional piece of machinery I will say however it certainly looks better on a Comet than a twin and it copes with the variations in the Comet crankcase exterior variations that were produced over the years (in one of my installations I had to make a curved stud)What could be nicer than one of these, It looks like it was made for the job, Sorry Norman, It was !.
The idea of a single unit as generator and ignition, especially on a Comet is not new. When I first took over the Comet I have it was fitted with one of these units, which I still have in my 'parts bin".Norman,
that end is standard in that motor as its main purpose is most likely a servo motor with its magnetic hall sensor - that I removed, no use here. I just rememered someone asking for the Hegeler system and its generator at the mag position. Without any gearing up - that I´d hate to have there - with its own flaws - you would see twice the speed required to get my readings of course. I don´t plan to offer any sets, just messing around, mainly for own bikes - and discussions . But you are right, on a Comet this could be a great way having power plus electronic ignition from that end.
Forgot to mention: No need to reduce o.d. of the motor to the very end of the end cap to 68 mm, there is sufficient clearance to the engine case already. Just the drive end is critical, but 70 mm is doable on the engine case when you decide on that motor size. 68 mm are very common though.
The idea of a single unit as generator and ignition, especially on a Comet is not new. When I first took over the Comet I have it was fitted with one of these units, which I still have in my 'parts bin".