UPDATE:
whenever I pull the trigger, the motor makes a small noise but otherwise nothing happens.
Edited by Xervous, 14 August 2013 - 11:46 PM.
Posted 14 August 2013 - 05:56 PM
Edited by Xervous, 14 August 2013 - 11:46 PM.
Posted 14 August 2013 - 06:23 PM
Posted 14 August 2013 - 06:31 PM
You've got the tray soldered in backwards. Switch the wires and you're golden.
Edited by Xervous, 14 August 2013 - 06:47 PM.
Posted 14 August 2013 - 06:36 PM
Edited by Mully, 14 August 2013 - 06:39 PM.
Posted 14 August 2013 - 06:46 PM
Posted 16 August 2013 - 03:40 PM
Posted 16 August 2013 - 06:09 PM
Huh...when you pull the trigger, and the engine makes that growling sound, is it making any kind of smell? Have you taken out any of the locks, has anything else been done your stampede, aside from an after market spring, and AR removal? Did you open the gear box, or tinker with that area at all?Seeing that other people were having this issue while using 4 trustfires but not with 3, I tried that but the blaster still does nothing more than a light growl when I pull the trigger.
Posted 17 August 2013 - 01:17 PM
Posted 17 August 2013 - 01:18 PM
Edited by azrael, 17 August 2013 - 01:22 PM.
Posted 17 August 2013 - 02:13 PM
EDIT: Woops, double post.
Let's make it useful, at least.
Are you sure there's no corrosion or anything that could mess up the contacts? Have you considered that you may have a cold solder joint? Cold solder joints are a poor electrical connection.
What solder and soldering iron did you use?
Posted 17 August 2013 - 05:08 PM
Edited by azrael, 17 August 2013 - 08:32 PM.
Posted 20 August 2013 - 07:01 PM
The voltage measures correctly when measured where? At the point where it contacts the Stampede?
And the solder isn't about age, it's about technique and what type of solder it is. Still haven't mentioned the type of soldering iron (wattage mostly) and solder alloy.
If your technique isn't good, your solder joints will not be good. I can't tell from that pic is your solder joints are good, but it looks like the solder did not wet on the contact at all. Meaning not really all that good.
EDIT: Wait, what batteries are you using? Are they unprotected or protected Trustfores? Protected ones will not work.
Posted 20 August 2013 - 07:30 PM
Edited by Mully, 20 August 2013 - 07:31 PM.
Posted 20 August 2013 - 07:37 PM
Posted 20 August 2013 - 08:09 PM
Oh whoops, my bad, I meant the AA battery tray.this is the one that came with the stampede.
With 3 or 4 trustfires it doesn't work, but it does work with 2...
Posted 20 August 2013 - 08:14 PM
Oh whoops, my bad, I meant the AA battery tray.
Edited by Xervous, 20 August 2013 - 10:48 PM.
Posted 20 August 2013 - 08:30 PM
Then as I mentioned earlier, they're might be some kind of voltage restricting device built into the tray. May I suggest trying out a kind of ghetto Trustfire rig, to test if the tray is legitimate? What I'm suggesting is basically along the lines of, take a few pieces of wire strip them, and then tape/get them too touch the ends of the batteries, and then hook them up to your Stampede. I'd recommend taking apart your 'Pede for this, if it isn't already disassembled.Its just a cheap little piece I picked up from radioshack.
Edited by Mully, 20 August 2013 - 08:32 PM.
Posted 20 August 2013 - 09:53 PM
Posted 20 August 2013 - 10:08 PM
I think it's already like that man. As far as I can tell he did it correctly.The black wire should go to the spring.
The red wire to the tab.
There is no thermistor in the battery sled.
There is no thermistor in the battery sled.
Edited by Mully, 20 August 2013 - 10:24 PM.
Posted 20 August 2013 - 10:14 PM
Posted 21 August 2013 - 12:20 PM
That is a VERY clear indication that your AA tray does not work, either because of your solder, or because of the tray.I'm using unprotected (gray) trustfire batteries.
Testing the solder joints, they provide negligible resistance alongside the metal plates, though I don't know if this is relevant.
When firing with 6 D batteries, the voltage across the two panels on the battery sled dips slightly from 9 to about 8. When attempting to fire with the trustfire batteries, it drops to 0 volts.
Wrong, the spring has a high resistance, and should not be soldered to. Excessive current draw can cause it to light on fire. This is a well documented problem with battery springs. Ideally, battery trays shouldn't use springs at all.Dude, as already pointed out, your battery connector is connected to the battery sled in the wrong polarity.
The black wire should go to the spring.
The red wire to the tab.
There is no thermistor in the battery sled.
It should not matter if you solder the wires to the spring and tab, so long as the join is good and clean.
No other electrical mods are needed unless you want to remove all of the locks.
Edited by azrael, 21 August 2013 - 12:22 PM.
Posted 27 August 2013 - 04:45 AM
That is a VERY clear indication that your AA tray does not work, either because of your solder, or because of the tray.
Wrong, the spring has a high resistance, and should not be soldered to. Excessive current draw can cause it to light on fire. This is a well documented problem with battery springs. Ideally, battery trays shouldn't use springs at all.
Posted 27 August 2013 - 11:51 AM
That should give you an idea, at least.Looking at #24 gauge bare copper wire which has almost the same
diameter as 0.022 inch wire, the resistance for 1000 ft is 20.8 ohms.
For 1 foot, it's 0.0208, and for 1 inch it's 0.001733 ohms.
The length of the helix is approx:
L=4.5 turns times 0.375 inches times pi=5.3 inches.
The increase in length due to the helix over the
circumference is only about 0.2 percent, so this increase
will be ignored.
5.3 inches times 0.001733 equals 0.00918 ohms total for a copper spring.
Knowing that the resistivity of SS is about 42.4 times higher than
copper, multiplying the total resistance times 42.4 gives us an
estimate of the total resistance of the SS spring.
R(SS)=0.00918 times 42.4 which equals 0.39 ohms total.
This number indicates something went wrong with the previous
calculation done in the previous post. I suggest checking
it for an error involving the conversion factors. Since rho
is given in ohm-cm i suggest working entirely in cm and cm^2
and redo the calculations.
Edited by azrael, 27 August 2013 - 11:53 AM.
Posted 27 August 2013 - 10:26 PM
Posted 28 August 2013 - 01:32 AM
Edited by azrael, 28 August 2013 - 01:35 AM.
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