Search: Posts Made By: mrasmm
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03-09-2011, 11:16 PM
Replies: 71
Views: 115,872
Posted By mrasmm

RE: Brushed Electric Motor Break-In Guide (Not Just For Heli's)

Gotcha. Actually this DMM has an internal switch that switches automatically between an ammeter and a volt meter. See the manual on page 25.
...
03-07-2011, 06:54 PM
Replies: 71
Views: 115,872
Posted By mrasmm

RE: Brushed Electric Motor Break-In Guide (Not Just For Heli's)

Got a pic or a brand and model #?

Here's one you can get for like $3 bucks on sale or $5 bucks normally


...
03-07-2011, 06:33 PM
Replies: 71
Views: 115,872
Posted By mrasmm

RE: Brushed Electric Motor Break-In Guide (Not Just For Heli's)

You've probably got to change the position of the red lead on your multimeter. If you look on your multimeter, it probably has 3 red ports and 1 black port. If you take a pic of it and post it...
03-07-2011, 02:54 PM
Replies: 71
Views: 115,872
Posted By mrasmm

RE: Brushed Electric Motor Break-In Guide (Not Just For Heli's)

One other note. Make sure you do this or you could get a fried multimeter. So the black lead plugs into the common, and the red lead is going to plug in to the Amp receptacle (vs volt or mA on most...
03-07-2011, 02:48 PM
Replies: 71
Views: 115,872
Posted By mrasmm

RE: Brushed Electric Motor Break-In Guide (Not Just For Heli's)

You're welcome =)

So what you have here is a parallel setup. You're looking for a series set up. To get it correct, when you look at your diagram, it should look like a circle.

So lets...
03-06-2011, 06:02 PM
Replies: 71
Views: 115,872
Posted By mrasmm

RE: Brushed Electric Motor Break-In Guide (Not Just For Heli's)

ahh, IC. I didn't see a way they could have an rx in there, but I guess if it's for dsm2 then there ya go.




Yes on both accounts. This motor should start around .3A and work its way...
03-06-2011, 05:21 PM
Replies: 71
Views: 115,872
Posted By mrasmm

RE: Brushed Electric Motor Break-In Guide (Not Just For Heli's)

ahh gotcha. So it comes with everything but the rx and tx? What an ARF really should be =P



yeah, sounds about right.

I do break-ins with my PSU. So what I do is run it on a...
03-06-2011, 03:28 PM
Replies: 71
Views: 115,872
Posted By mrasmm

RE: Brushed Electric Motor Break-In Guide (Not Just For Heli's)

You're welcome.

OK, this one then ;)
http://secure.hobbyzone.com/search/HBZ7380.html

I'm not quite sure what the diff is between BNF and ARF, other than you put the pieces together from...
03-06-2011, 02:46 PM
Replies: 71
Views: 115,872
Posted By mrasmm

RE: Brushed Electric Motor Break-In Guide (Not Just For Heli's)

Hey there. It looks like you have
http://secure.hobbyzone.com/HBZ7300.html

It looks like the motor has some quick connectors on it from this picture
...
02-07-2010, 06:14 PM
Replies: 71
Views: 115,872
Posted By mrasmm

RE: Brushed Electric Motor Break-In Guide (Not Just For Heli's)

The answer is it depends.

Some of what it could depend on is how much money do you want to spend, is the motor likely to be used in a situation where it's better if it is disposable (like mud...
10-13-2008, 02:55 PM
Replies: 71
Views: 115,872
Posted By mrasmm

RE: Brushed Electric Motor Break-In Guide (Not Just For Heli's)

Sure, no prob. A wet break in takes all of the oil out of the motor. Most people think that it's carbon dust coming off the commutator. Basically with the small motors that we are talking about,...
10-13-2008, 03:04 AM
Replies: 71
Views: 115,872
Posted By mrasmm

RE: Brushed Electric Motor Break-In Guide (Not Just For Heli's)

Hey, no prob =) If it applies then it's not old to me.

If you want to do a wet break in then alcohol would be a better choice than water because it evaporates more completely than water (so...
08-11-2008, 12:51 AM
Replies: 71
Views: 115,872
Posted By mrasmm

RE: Brushed Electric Motor Break-In Guide (Not Just For Heli's)

10 min is pretty short to seat the brushes, although it's probably better than not doing one.

So with no load these motors draw 27A each? That's quite a bit. My guess is that it probably draws...
08-10-2008, 04:16 AM
Replies: 2
Views: 1,120
Posted By mrasmm

RE: Lipo C Rating...variable ratings???

There are variances in mfg process that account for some variability. Ask any engineer about it and you'll probably get an ear full =P When they say C rating they are talking about max discharge...
08-10-2008, 04:01 AM
Replies: 411
Views: 152,443
Posted By mrasmm

RE: How to convert an ATX power supply to rc use

if you mean while your computer is running? I'm sure you could, some of the risks would include, overloading the 12v rail with instant power off (most PSU's will do this when they get an undervolt...
08-10-2008, 03:54 AM
Replies: 71
Views: 115,872
Posted By mrasmm

RE: Brushed Electric Motor Break-In Guide (Not Just For Heli's)

looks like choppers beat me to it =P

you can run the motors singly, or you can run them in parallel, or you can run them in series. For the motors I've done, I find that somewhere around 1/4th...
07-24-2008, 03:43 PM
Replies: 1
Views: 749
Posted By mrasmm

RE: Li-Po for Newbs

As far as how to treat it, yes it's a good idea to run a "form" charge on lipo's, 0.5C charge 2C discharge for 3 cycles, and allow the pack to cool down between cycles to something like 80F

You...
07-14-2008, 03:54 PM
Replies: 5
Views: 2,861
Posted By mrasmm

RE: Help on Charging two packs Lipo

sure, no prob. Yeah things can get complicated quick. A good investment might be a couple of those cellpro chargers. They don't run too much, and they do a great job charging packs.

good luck...
07-14-2008, 02:53 AM
Replies: 5
Views: 2,861
Posted By mrasmm

RE: Help on Charging two packs Lipo

oh, a couple of other things I forgot. This balance adapter 1 x 6s to 2 x 3s is iMax compatible, which is the same as align esky eflite csrc and a slew of other ones. If you want to charge TP...
07-14-2008, 02:37 AM
Replies: 5
Views: 2,861
Posted By mrasmm

RE: Help on Charging two packs Lipo

I think you've kinda got it. What I would do is just use the one in the first picture. Depending on how it works, you wont need to use the deans connector if you have a balance charger setup. ...
03-01-2008, 12:52 AM
Replies: 411
Views: 152,443
Posted By mrasmm

RE: How to convert an ATX power supply to rc use

sure thing. FSP group makes a good PSU for about 40 or 50 bucks that would be able to put out what the label says. If not, I'd just look for something that's more along the lines of 16 to 18A or...
02-29-2008, 02:35 AM
Replies: 411
Views: 152,443
Posted By mrasmm

RE: How to convert an ATX power supply to rc use

it all depends on the conversion efficiency of your charger, but yes it will take considerable more power, about 33% more assuming a 100% efficient conversion factor. If it's a compaq PSU, it's...
02-29-2008, 02:27 AM
Replies: 71
Views: 115,872
Posted By mrasmm

RE: Brushed Electric Motor Break-In Guide (Not Just For Heli's)

well have him read the article if he hasn't, and see if that helps him make more sense of the benefits of doing it. If not, then I guess that's where you are =) The motors are only like $10 bucks...
02-28-2008, 01:11 AM
Replies: 411
Views: 152,443
Posted By mrasmm

RE: How to convert an ATX power supply to rc use

hey there, I got your PM, so here it goes.

The formula for TDP is voltage squared over resistance, so it's 5.15^2 or 26.5/resistance. For series you add all the resistance together to put it on...
12-09-2007, 02:45 PM
Replies: 4
Views: 845
Posted By mrasmm

RE: Need HELP controlling the Blade CX2

it's all about setup. Read this and see if it helps you any
http://www.heli-wiki.com/mediawiki/index.php/HOWTO_Wiki_Overall_CX_and_CX2_Setup

and check out the rest of the cx2 articles on this...
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