OOh, now I get it. I have belts on my tank as well so it won't take
long for me to upgrade. Thanks.
-Matt
On Nov 4, 5:02 am, Steve Tyng <[EMAIL PROTECTED]> wrote:
> Matt,
>
> Very nice work on your Abrams (nice website also).
>
> On the EV amperage. The Cromwell is running 24v and I only have one
> 60A fuse in the circuit (in front of the controller). I've never
> stalled a motor or blown a fuse. I attribute that to two facts, my
> controller is current limiting and I have belts on my first stage
> reduction acting as a mechanical fuse. When building these things
> it's important to avoid high amperage conditions caused by a motor
> stall using techniques most appropriate for your mechanical and
> electronics mix.
>
> Steve Tyng
>
> On Nov 4, 2:26 am, "Chris. b" <[EMAIL PROTECTED]> wrote:
>
>
>
> > If you run the evs at 24v you will have a hard time stalling them on a
> > 9:1 ratio, your more likely to break your tracks or chains somewhere.
> > If you install belts you will never stall the evs under normal use. I
> > used to run evs 12v 9:1 with 60amp fuses, never blew one of them and I
> > didnt exactly take it easy on my tank.
>
> > Chris. b
>
> > On Nov 4, 9:43 am, "Derek Engelhaupt" <[EMAIL PROTECTED]> wrote:
>
> > > Wire
> > > Gauge
> > > 00 awg 400 amps
> > > 0 awg 325 amps
> > > 1 awg 250 amps
> > > 2 awg 200 amps
> > > 4 awg 125 amps
> > > 6 awg 80 amps
> > > 8 awg 50 amps
> > > 10 awg 30 amps
> > > 12 awg 20 amps
> > > 14 awg 15 amps
> > > 16 awg 7.5 amps
>
> > > These are the recommended maximum fuse ratings for the corresponding
> > > wire size. Using a smaller fuse than what's recommended here will be
> > > perfectly safe.
>
> > > I got this chart off of an electronics website. These maximums are
> > > designed to keep the wire from burning up (ie: starting on fire).
> > > According to this chart, my fuses are too big for my wire size. The
> > > M-01 motors Joe sells have blown 30 amp fuses in a stall. I'm
> > > thinking I need to put some smaller fuses in my tank. Yes you EV's
> > > will have a higher stall current at 24V, but they should also draw
> > > less amps at 24V under the same load at 12V.
>
> > > Derek
>
> > > On Mon, Nov 3, 2008 at 3:37 PM, Matt <[EMAIL PROTECTED]> wrote:
>
> > > > Well I thought that the speed controllers would be able to handle the
> > > > current more readily at 12 volts. As you can see, the tank is very
> > > > long and narrow, so it doesn´t do turns very well. at 24 volts, the
> > > > stall current is close to 200 amps. the speed controllers are only
> > > > rated at 120 amps continuous, and 200 amps for 2 seconds. The increase
> > > > in power would make the motors less likely to stall out, but to begin
> > > > with I just wanted a good, solid system to move the tank.
>
> > > > But, in case I do want to upgrade the voltage, what fuses would I use?
> > > > I was thinking 120 amp, but I am no expert on this stuff. Its
> > > > definitely at the top of the list of upgrades, along with a suspension
> > > > system.
>
> > > > Thanks for all of the imput,
> > > > -Matt
>
> > > > On Nov 3, 11:59 am, "Derek Engelhaupt" <[EMAIL PROTECTED]> wrote:
> > > >> Great looking tank Matt. Just a few questions. What was the
> > > >> reasoning behind gearing the EV's so low? Just curious since most of
> > > >> the EV folks use a 9:1 ratio on them. Secondly, did you have a reason
> > > >> for going with 12V instead of 24V? I'm asking since the motors are
> > > >> more efficient at 24V. I would think that if you ran them on 24V with
> > > >> a 9:1 ratio, you would still be able to make your climbing goals... :)
>
> > > >> Derek
>
> > > >> On Mon, Nov 3, 2008 at 1:44 PM, Chris Malton <[EMAIL PROTECTED]> wrote:
>
> > > >> > I have to say, I think it probably deserves its designation, even if
> > > >> > it
> > > >> > wasn't ready for it.
>
> > > >> > That is pretty cool. Well done Matt.
>
> > > >> > Chris
>
> > > >> > On 03/11/2008 15:55, Matt wrote:
> > > >> >> I think my Tank is finally ready for a designation number. You can
> > > >> >> go
> > > >> >> to my website atwww.freewebs.com/shootermiketocheckoutthe videos
> > > >> >> of it moving.
> > > >> >> Thanks
> > > >> >> -Matt- Hide quoted text -
>
> > > >> - Show quoted text -- Hide quoted text -
>
> > > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -
--~--~---------~--~----~------------~-------~--~----~
You are currently subscribed to the "R/C Tank Combat" group.
To post a message, send email to [email protected]
To unsubscribe, send email to [EMAIL PROTECTED]
Visit the group at http://groups.google.com/group/rctankcombat
-~----------~----~----~----~------~----~------~--~---
