forward and reverse switched!

[jwiersma]

Ok me and my Razor again.

When i pull the throttle back it now goes in reverse (its the opposite).

I have adjusted the pin on the controller and although it switches the forward/Reverse back to normal...the speed is still the opposite (forward has the speed of reverse and reverse has the super speed of forward!!)

i have read over and over the manual...but i can;t figure this out.

Does anyone else have a Razor that could help me???

thanks so much....my hair is being pulled out as i write this!!!

[GA Maxx]

What is a razor? is it nitro or el-ectric?

[jwiersma]

Its electric

Kyosho Razer ZX-5

[NotWalkinBlind]

*burp*




Dude... I think you might have your motor wired backwards... switch the leads and see if that fixes it.

[mrcandyman]

either switch the leads going to the motor or reverse it on the transmitter

[jwiersma]

Hmm...ill try that but i never touched them and it was fine before???

[bigboots1302]

and it is a lazer zx-5 not razer

[jwiersma]

wow...i was in panic mode and must have lost my mind. thanks!!

[mrcandyman]

might have accidentally hit the switch on the transmitter. I know I'll do that sometimes

[rccardude04]

What ESC do you have?
What radio?

-Eric

[NotWalkinBlind]

jwiersma, did you solve your mystery problem yet?

[jwiersma]

not yet.

ESC = Perfex KR-15 (Kyosho)
Radio = Perfex KT 3H5

[rccardude04]

Have you ever had the differentials out of the vehicle, both at the same time? If so, you might have put them in backwards.

Otherwise, it's about got to be reversed motor wires.

-Eric

[jwiersma]

no nothing has ever been removed from the car other than the wheels. and the wires have never been changed.

[z-man280]

k, let me see if i got all this:

for no reason, it reversed itself from forward to reverse. You tried servo reversing, only to have it run slower in forward than in reverse, and visa versa with reverse being faster. but, you never switched anything???

so, switch the motor wires, reverse the channel 2 switch again, and try it. if it goes faster in forward, or more like it used to, call it good ,and run it.

[jwiersma]

k, let me see if i got all this:

for no reason, it reversed itself from forward to reverse. You tried servo reversing, only to have it run slower in forward than in reverse, and visa versa with reverse being faster. but, you never switched anything???

so, switch the motor wires, reverse the channel 2 switch again, and try it. if it goes faster in forward, or more like it used to, call it good ,and run it.


OK perfect..i will definitely try that. Thanks..i know i sound like a nut...but i swear all i say is true ..lol!!

I will will let you all know what happens!!!

[z-man280]

let us know

[jwiersma]

everything worked when i switched the wires accept now the reverse speed is so slow that it will hardly move....the forward is at full power...i have no idea what the problem is now!! batteries are at full power as well!!

[rccardude04]

Read the manual and go through the ESC setup sequence, which should involve pushing a button, holding full throttle, brake, neutral, etc.

These things do not happen on their own. If it did, something is horribly broken.

If the reverse doesn't go fast, some ESCs just don't have a strong reverse drive. It's designed to get you off the wall, not drive around all day long. In most cases, I'd say slower reverse is normal.

-Eric

[jwiersma]

Thanks. I went through that process about 20 times....and before this happened reverse was extremely powerful. Its weird but i guess i will have to completely take the thing a part.

[GSMnow]

Check the end bell of the motor. I am willing to bet your end bell screws came loose and it turned. Your timing is probbaly way out of whack now and you may very well be running on the reverse of the ESC now since you switched the wires. The motor should have a zero timing mark and a + and - on the end bell where the wires go. Connect just 2 cells right to the motor and make sure it goes the right way with the polarity correct. Do this with the wheels off the ground using clip leads and be careful, even 2 cells can make good sparks. If the end bell was moved, go back and make sure your ESC is going forward with triggger pull etc. Good Luck.

[GSMnow]

I saw on your other thread that you still don't have this fixed.


ESC = Perfex KR-15 (Kyosho)
Radio = Perfex KT 3H5

The Perfex KR-15 is just the reciever, not the ESC. What ESC are you using? Many do have an LED or so to let you see if it is setup right, and you said you have re-done it, so that is probably not the issue here. Is the motor a brushed or brushless? If it is brushed, did you check the position of the end bell like I wrote in my last post?

On a brush motor, the brush hoods should be fairly close to the center of the magnet. If it is a higher turn motor, like a 27 or 19 turn, they do run with a fair amount of advance, where the brushes will be rotated up to 30 degrees, but starting with it at the center of the magnet is fine. I really think you have the brush timing way off. A lower turn mod motor will run best with only 6 degrees of timing advance. Any brused motor will run with much more timing, but at a huge increase in amp draw. If your timing is seriously advanced (if rotated over 90 degrees it reverses the rotation, sounds like your issue) it will run forwards with high current and poor efficiency, but high revs, but then running backwards has timing retard, which totally kills any power. The current draw will be high but with low rpm and no torque. All of the symptoms fit a rotated end bell.

[InspGadgt]

How about some pictures of your car's setup?

[jwiersma]

Ok so the ESC is also a Perfex. here are a few photos of the motor. I think i understand about the end bell, however i cant figure out how to take the motor apart to get to it. I have the motor in my hands...but nothing???

[InspGadgt]

That is a closed endbell motor and it cannot be disassembled without damaging it.

My best guess is that somehow your servo reverse switch on the radio got bumped initially and that is what caused your throttle be backwards. Then when you switched the wires and reset the servo reverse the car's foward would now be the motor's reverse (because of the reverse polarity). Since the motor has some timing in it it will run slower in reverse then foward, but not drastically slow. Chances are during all this you blew a FET on the ESC causing the problem to get worse. Either that or the motor is fried. Typically the ESCs that come with radio systems are very low end and are prone to burning out. Best bet is to take it to a local hobby shop and see if they have a motor or something you can test with there to figure out which you need to replace...the ESC or the motor.

[jwiersma]

All is good! thanks everyone. I bought a new ESC (AI) and everything is back to normal!!!!

thanks again for all of your help!!! Its great to have this kind of support when starting something new.

J