I've found a ZZ SE design fault
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micro_Amps
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I've found a ZZ SE design fault
Hi everyone,
Those of you that have several ZZ SEs might have noticed that some are faster than others, or some ZZ SEs dont have the 'punch' off the line when you go to accelerate.
I have been working on many of these cars and was puzzled as to why it was some are weak even after being fet modded, actually the difference was more pronounced after fet modding.
Believe it or not, in some cars the digital control is backwards, yes, BACKWARDS. Not the motor polarity control, but the digital speed control steps.
The car goes forwards when you command it to go forwards, but it is only on 3 steps of forward control instead of the 5 that it is supposed to be.
The way these cars are setup is that they have 5 steps in forward control and 3 in reverse, making reverse slower and weaker. Thats the way it is supposed to be.
Some cars (very few) have their drive control signalling installed backwards.
The telltail sign, is that it runs faster in reverse than it does in forward, because it has the 5 steps incorrectly set to reverse.
And this is especially obvious once the car is fet modded.
Its easy enough to test, just hold your car up to your ear and run it, if it sounds faster in reverse then you have got a car with the problem.
The way to fix it would be to reverse the wires to the motor on the pcb (and dont forget to change the filter capacitor polarity as well) and then switch over the L / R switch on the top of the controller and it should work again.
It will always be a bit different in that if you want to use that controller on other cars as well, you will have to switch over the L/R
Just thought I'd post this and get your opinions, and let you know.
uA
Those of you that have several ZZ SEs might have noticed that some are faster than others, or some ZZ SEs dont have the 'punch' off the line when you go to accelerate.
I have been working on many of these cars and was puzzled as to why it was some are weak even after being fet modded, actually the difference was more pronounced after fet modding.
Believe it or not, in some cars the digital control is backwards, yes, BACKWARDS. Not the motor polarity control, but the digital speed control steps.
The car goes forwards when you command it to go forwards, but it is only on 3 steps of forward control instead of the 5 that it is supposed to be.
The way these cars are setup is that they have 5 steps in forward control and 3 in reverse, making reverse slower and weaker. Thats the way it is supposed to be.
Some cars (very few) have their drive control signalling installed backwards.
The telltail sign, is that it runs faster in reverse than it does in forward, because it has the 5 steps incorrectly set to reverse.
And this is especially obvious once the car is fet modded.
Its easy enough to test, just hold your car up to your ear and run it, if it sounds faster in reverse then you have got a car with the problem.
The way to fix it would be to reverse the wires to the motor on the pcb (and dont forget to change the filter capacitor polarity as well) and then switch over the L / R switch on the top of the controller and it should work again.
It will always be a bit different in that if you want to use that controller on other cars as well, you will have to switch over the L/R
Just thought I'd post this and get your opinions, and let you know.
uAmicro fet mod, BCG, ZZ, website => MicroAmps homepage website
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sg219
- bitPimp
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That makes sense to me. I think I had one of those. I returned my ZZSE because of the steering being pinched by the body, it didn't hold a charge, and it was a little slow too.
It still amazes me that you figure these kind of things out, but the people that make them continue to put them on the market with all these flaws.
Everyone does all these MODS to these cars, and you would think someone would pay attention to these products and see what is being done to them after market and either correct the flaws or openly admit to them.
If this kind of thing was happening with other consumer products they would have all been recalled for safety concerns.
Could you imagine getting a new car with the transmission geared backwards, a new car with a half dead battery, a brand new $5000 flat screen plasma TV and the remote don't work.
I understand that these are toys, but I wish RS would get their act together and be consistant with the product they put out. You're payin' $25 for the car @ RS, and anywhere between $5 and $15 for other brands of micros, you tell me which has better outcomes after you get them home for the $$cash$$.
I'll stick to my Shen's and ZZ Classic, until I can afford $25 for a test drive and a headache.
Sorry about the rant, but I couldn't help it.
It still amazes me that you figure these kind of things out, but the people that make them continue to put them on the market with all these flaws.
Everyone does all these MODS to these cars, and you would think someone would pay attention to these products and see what is being done to them after market and either correct the flaws or openly admit to them.
If this kind of thing was happening with other consumer products they would have all been recalled for safety concerns.
Could you imagine getting a new car with the transmission geared backwards, a new car with a half dead battery, a brand new $5000 flat screen plasma TV and the remote don't work.
I understand that these are toys, but I wish RS would get their act together and be consistant with the product they put out. You're payin' $25 for the car @ RS, and anywhere between $5 and $15 for other brands of micros, you tell me which has better outcomes after you get them home for the $$cash$$.
I'll stick to my Shen's and ZZ Classic, until I can afford $25 for a test drive and a headache.
Sorry about the rant, but I couldn't help it.
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crazydave
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