3573 replies to this topic

[Kim Lander]

Very nice looking motor Robert....John have you tried the balancer yet, I`m curious to see what you think of it....Kim

[Robert V.]

Hi guys
Thanks Kim, thanks John that's a good idea i will have to look into getting one.

[havlicek]

Very nice looking motor Robert....John have you tried the balancer yet, I`m curious to see what you think of it....Kim

Hi Kim,

Sorry I forgot to get back to you on that Yes, I tried it and it's a cool thing but much less accurate than razor blades. Too bad, because it's really not dependant on being set level, certainly not as much as the regular razor blade (or gauge pin) balancing jig. Across maybe a dozen or so arms, it couldn't pick up balance errors that were consistently picked up by my RGEO jig.

-john

[Bill from NH]

Kim/John, what type of balancer was this one? One of the magnetic ones like a prop balancer or another type?

[Alchemist]

Hi Robert,

Another very nice motor - great job Robert! Wish I could hear it run. Too bad we don't have audio clips of the rewinds running on voltage! I think that would be so QOOL!

You mentioned the new sticker. Did you make that? Looks good!

Thank you.

Ernie

[Robert V.]

Hi Ernie
Thanks i wish i made that magnum sticker it's in very good condition considering how old this motor is i am not even shore if it was original to this motor or some one just stuck it on but it looked good so i left it alone, i agree to hear these motors would really add to the entire experience. I would like to see some other people rebuilding and rewinding their motors it's not that hard to do and it's fun watching the motor run after you built it, maybe we will see you rewind a few if you haven't already.

[Alchemist]

Hi John, Robert, SteveV, Victor and pardon me if I left anyone out who has posted their rewinds.

My question is this, when you drill to balance the armature, is it required to deburr the balancing hole or is it even necessary? I noticed the balancing holes are burr free! What type of drill bit do you use? Do you use a padded vise to hold the arm while drilling so as not to damage the arm?

Thank you for your time.

Ernie

[havlicek]

Kim/John, what type of balancer was this one? One of the magnetic ones like a prop balancer or another type?

Hi Bill,

It's the kind with two thin aluminum wheels supporting each end of the arm shaft that spin on a pin/axle. It is used for prop balancing as you guessed, but the razor blade jig consistently beat it by a good margin.

My question is this, when you drill to balance the armature, is it required to deburr the balancing hole or is it even necessary? I noticed the balancing holes are burr free!

Hi Ernie,

My method is to do a quick polish after balancing. This cleans the burrs up and makes the engraving more legible...not to mention adding that last bit of shiny goodness which does nothing for performance but looks cool!

-john

[Alchemist]

Thanks for the reply John!

not to mention adding that last bit of shiny goodness which does nothing for performance but looks cool!

Yes indeed - it looks very QOOL!! I have to disagree with you please John in regards to "having nothing to do with performance". IMO, when it looks QOOL, you FEEL QOOL, and when you fell QOOL, you perform better - LOL!! (QOOL = is oriental spelling for KOOL/COOL) LOL!!!!!!

[Robert V.]

Hi Ernie
On mine i used a fine sand paper to clean the area around the drilled hole and i used a 1/16 drill bit the vice i used has vinyl jaws so it won't damage the arm and what ever you do don't try to hold the arm by hand you could slip damage the arm and your hand, i know a dumb suggestion that most everyone should know.

[Bill from NH]

John, have you ever rechecked your arm balancing after the stacks are engraved to be sure it hasn't upset your balance work? I know it might seem minute, but you never know...

[havlicek]

John, have you ever rechecked your arm balancing after the stacks are engraved to be sure it hasn't upset your balance work? I know it might seem minute, but you never know...

Hi Bill,

I wish that static balancing were that sensitive! I do try and take that into account sometimes by seeing if I can leave the arm with maybe the slightest possibility of a bit of weight on the pole to be engraved. I have looked at this by trying to make a balanced arm unbalanced by engraving, but have not been able to conclusively see that it affects it. Let's face it, even though I try...these arms are only as good as luck will allow. Best I can say is that I get conistently luckier the more I do them

-john

[One_Track_Mind]

Best I can say is that I get conistently luckier the more I do them
-john

John, one would think that your being a little modest here...your just getting better with old age! j/k!

[Bill from NH]

John, as I thought, to do this would be too anal! I wonder if other arm manufacturers take this into account?

[DirtyHairy]

gonna rewind this for me John??? then we got to make it fit.....somehow

[Bill from NH]

Justin, if you can get that arm to fit, I got just the pair of motor springs you'll need!

[havlicek]

John, one would think that your being a little modest here...your just getting better with old age!

Tell you what Brian...I AM getting older for sure!

John, as I thought, to do this would be too anal! I wonder if other arm manufacturers take this into account?

I bet they don't Bill, the amount fo weight is teensy, besides with tagged arms, the balancing is done afterward and there's no stack engraving. I've also switched from using a diamond point to a Dremel engraver, and the engraver takes off waaaay less material.

gonna rewind this for me John??? then we got to make it fit.....somehow

Sure thing Justin...but for that one I'm gonna have to charge extra As for making it fit...easy, just get a bigger hammer!

-john

[DirtyHairy]

i hope you know i was being sarcastic..although i guess if i did have you rewind it , i would have a one of a kind arm......it would be a cool display item or something like that.......errrrr

[havlicek]

i hope you know i was being sarcastic..although i guess if i did have you rewind it , i would have a one of a kind arm......it would be a cool display item or something like that.......errrrr

...well duh Justin (see my smiley above)!

-john

[Mr. Frank]

Give me that sucker... I'll make it fit....




Mr. Frank

[havlicek]

I'm slowly getting things together for next year's proxy, and have completed the arm for a Champion 26D. This may or may not be the final arm I use (I know a rewinder well ), but it sure seems promising right now. It's a #29 double wind (done with two spools instead of a serial wind) that reads somewhere between .3 and .4 ohm and sings like one of the three tenors. I used a Tradeship com with the built-in timing advanced to run clockwise, a mystery stack with a quite thick web...significantly thicker than the Mabuchi, and inserted a drill blank shaft. I tied this one up like a Christmas turkey and it balanced right up with no problems. I was able to run it for a minute at 6V without it melting through the unprotected spring posts which is always a good sign. The Arcos that came in the can read quite strong (thanks Roger!), so everything looks good.


Here's the stuff I have so far for the car, but since the motor is on the way...the rest is easy Oh yeah...the Q-Tip box is for the body



I figure with a year to go, I just might finish this thing on time

-john

[Horsepower]

Justin that's crazy! You can't put that armature in that little car. It isn't balanced yet!

[DirtyHairy]

i got a couple of them....they came out of the heater motors in the semi trucks we work on.....if anyone honestly thinks they can do something with it , im sure i could part with one.....i just hand them on my wall where i work on my motors

[havlicek]

Just to prove how absolutely stupid I can be at times, I went to work on completing the 26D for my thingie entry and without thinking about it, cut the shaft on the endbell side of the arm. So now I have a very nice can-drive 26D arm with no use for it. If anyone wants it, just give me a PM and they can have it for zip, nada, zilch, zero. The arm should do well in any Mabuchi 26D motor with only the normal precaution of adding post protectors and it's a #29 double wind finished with hi-temp epoxy and tied with kevlar. First PM gets it. Now I have to go hit myself with a heavy blunt object while writing on the blackboard 100 times..."I am a dummy".

-john

[Robert V.]

Hi John
Nice work on that arm john to bad you can't use it, it's interesting how you tied the arm with the thread going in between the stacks never saw that done before, we all make mistakes although i have never cut the shaft like that i have forgot to epoxy the comm and had to tare the arm apart because it moved and was way to far advanced.