Ypvs servo motor
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Hello guys, looking if anyone knows what electrical engine fits inside the Ypvs, i tried to put mine on the other day and noticed that it was turning the valve extremely slow, took everything apart and the motor inside the unit had seen better days, after all its from 1988, and the previous owners plinned the valve fully open while the ypvs was plugged in so i that also contributes to the motor turning slow. Or just if anyone knows where i can find a motor, ive been trying on ebay and different rc-car websites, idk if im searching for the wrong thing but if anyone knows what i should search or where i should search id greatly appreciate it.
Dimensions:
Outerdiameter=27mm
Heigh of motor=38mm
Shaft Diameter=2,3mm
12 Tooth pinion gear with a diameter of 6mmIt also says PXN-15EE13C 09Nov87NA (no clue what it means, probably made 9th november 1987 but no clue about the first stuff)
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@Arild have a look on here.,. Pretty sure your one is here https://uk.rs-online.com/mobile/c/automation-control-gear/electric-motors-motor-controllers-peripherals/dc-motors/
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@Louis-DT-WR
Thanks mate, ill have a look -
@SpookDog the servo for the 3 wire ypvs is just a regular two wire dc motor, the only thing u need is dimensions for the motor and make sure the pinion gear fits, i havent found one yet close to me soley for the fact that im not willing to pay 20 pounds shipping for a tiny little dc motor that cost me 3 quid, i live in sweden so shipping is expensive to here
I have no clue about the plastic gear honestly, i can have a look whenever i get back to my garage because im currently away and not able to go in the garage
I saw some guy mount his servo straight to the powervalve and skip all the cables etc once, maybe that way u skip breaking cogs? -
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These motors are simple DC 385 motors and cost next to nothing from sites like AliExpress, Ebay and Amazon.
Just Google "385 DC motor" and you will get a lot of hits. They usually come with different voltage and rpm-ratings. So buy a few and try which one works the best. It should also be fairly easy to work out the rpms too by doing some simple math.Please post which motor that worked best
The YPVS is quite simple a servo motor that works just like model airplane servos. As far as I know, the YPVS use 12V supply voltage and 4,9V PWM pulse signal.
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@GeirA
Hey yeah, my first instinct was to go on ebay and aliexpress, then i remembered that sweden has fees from taking packages outside of europe, so every 1 quid dc motor would end up around 10 quid each because of customs etc, and not to mention the fact that it takes a long time for them to arrive
I dont know how dc motors work, i would think that the most important part is the torque it produces, but im not too sure
But thanks for letting me know that its called a 835 dc motor specifically, easier to find what im searching for now -
Hang on, hang on, hold up a minute...
Are you telling me we could upgrade the servo motor to improve the servo’s responsiveness across the rpm range?Aye, I might have missed something but I can’t have been the only one to think it moves like it’s got arthritis
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@Stevie-Wonder
Thats my guess, but at the same time the bike doesnt jump from 4k to 10k in an instant, so i dont really think u need some ultra super dc torque monster electrical motor, i think its just fine with a normal one, or the original but just maybe with some new brushes which u can find on ebay -
@Arild Yes I agree and it’s not that it’s doing a bad job, I just saw the way the servo shits the bed if you’re quick on the throttle above 7-8k rpm and thought hmm I wonder if that could be improved and what difference it’d make.
Ps I’m in two mind about my own comment because in real life riding scenarios you should never be choppy with the throttle when riding a two stroke. All or nothing, it’s your responsibility to work the bike like an instrument to keep it singing in its sweet spot
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@Stevie-Wonder
Yeah could probably be improved, could start by opening the motor u have urself and see how it looks, mine was the definition of shit the bed, it could most likely have a small refresh and work great, otherwise u can buy the same size motors but that have way more torque and rpm and i guess that is the important part for ypvs -
@GeirA said in Ypvs servo motor:
The YPVS is quite simple a servo motor that works just like model airplane servos. As far as I know, the YPVS use 12V supply voltage and 4,9V PWM pulse signal.
I have researched a bit more and found that I have mistaken the pulse signal for being PWM. It's probably the rpm signal, not PWM.
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@Arild Isn't Sweden an EU-country? I live in Norway and there are virtually no extra fees ordering from China or other countries, at least when ordering stuff worth less than 300NOK (about £25). And Norway isn't even EU. That's strange.
But you could try to search for hobby stores in Sweden at the web. Some stores might have a 385 motor. As I mentioned, it's an ordinary hobby motor.
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@Stevie-Wonder
I’m sure you’re thinking of it stationary, when power isn’t really an issue. When you’re in most gears and accelerating it moves fast enough. I understand where you’re thinking is coming from though... -
@GeirA
Idk why sweden has done it they way they have but basically postnord, which takes care of the packages as soon as they enter sweden, take 70kr just to handle the package, and then they also take 10% of what the package was worth and add it onto the 70kr, so even the smallest things end up expensive, except if u order from wish, since wish takes care of the fees but shipping from wish is always around 70kr anyway, so there is no real good way of buyinf chinese things into sweden anymore -
The way the guy in the video has done it would make the valve not operate correctly.
The pulley on the motor is not the same size as the plastic pulley on the cylinder.... It's changed the rotary parameter and timing.
Also I'm pretty sure it would be running backwards as the servo is now facing the cylinder.
