Self accelerating reed switch magnet spinner.

[MileHigh]

TK:

I stand corrected.  Indeed, the flexibility of the moveable sense coil makes the high vs. low "hump order" of the magnet pass moot.  DUH on me.  Plus you have a variable threshold.

Well, everything I stated in my very first posting came true and more!  lol

It's the Swiss Army Knife of pulse motors!!!

MileHigh

[TinselKoala]

TK:

I stand corrected.  Indeed, the flexibility of the moveable sense coil makes the high vs. low "hump order" of the magnet pass moot.  DUH on me.  Plus you have a variable threshold.

Well, everything I stated in my very first posting came true and more!  lol

It's the Swiss Army Knife of pulse motors!!!

MileHigh

Actually, there is a significant difference with swapping the sense coil, a "second order effect". With the motor running in repulsion mode and the sense coil in the "forward" polarity, the op-amp switches the drive coil OFF during a steeply sloped portion of the sense coil waveform and so you get a very clean transition from ON to OFF, which is conducive to spike voltage rise and neon firing. But with the sense coil reversed, the op-amp is turning the drive coil OFF during the flatter portion of the sense coil waveform (since the sense coil waveform is now inverted.) This makes the transition less definite and this shows up in noise and even "ainslie oscillations" when the Off interval is short.

I think the strobe logic has reversed, though: the Blue strobe seems to indicate the "ON" edge of the pulse when the motor is running in repulsion mode, since this logic is controlled by the setpoint not the physical position of the sense coil.

ETA: Maybe not, I'm not sure at the moment just what the strobes are indicating when the motor is running in repulsion mode. Need more coffee, think about it.

[Pirate88179]

This makes the transition less definite and this shows up in noise and even "ainslie oscillations" when the Off interval is short.

Holy crap!  How long will it be before Rose claims credit for this device?  There may be a paper in the works as we speak.

Bill

PS  Great work TK and I really enjoy seeing the blending of MH's original idea and your building skills and modifications.

[TinselKoala]

Holy crap!  How long will it be before Rose claims credit for this device?  There may be a paper in the works as we speak.

Bill

PS  Great work TK and I really enjoy seeing the blending of MH's original idea and your building skills and modifications.

Heh... prolly just needs a few more bypass caps sprinkled along in there, maybe a few inches of coax... that'll take care of the aperiodic resonant parasitic Hartley feedback oscillations, or whatever they are this week.

Speaking of which, the end of September came and went without any more of the promised "proof" from Ainslie and her crack team of boffins. As we all knew it would.


Meanwhile, I have my team of minions and urchins out scouring the back alleys looking for a discarded VCR that I can scavenge....

[Pirate88179]

TK:

If you need a vcr hub, I can ship you one.  (free)  (as in, no cost)  A buddy gave me 5 of them and I cleaned out my lab a while back and got rid of most of them but, I can find one for you if you would like.  Very good bearings and a stable platform.  I have used hard drives also but, the vcr head is more heavy duty, so to speak.  Very easy to take out the internal wiring and put back together.

Bill