Pedal Assist Sensor Ebike Magnet Mystery (does it matter!!) "mr factotum"
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- Опубликовано: 16 июл 2024
- Pedal Assist Sensor Ebike Magnet Mystery (does it matter!!) Number of magnets in a PAS, whats the effect on different controllers. before you buy a new controller or PAS take a look at what i found by trial and error. If your making your cycle in to an electric bike from adhoc components, i.e. not a kit. then this might help you.
thanks for watching
a sub' like & share
appreciated
Kev
00:00 Intro
02:46 Magnets
04:46 Experiment
10:14 Conclusion 
Хобби
Enjoyed the update thanks for sharing. I was sceptical of these, however having hired one on holiday I'm converted. Much the same as my manual bike will be soon with all the learnings you have shared. Thanks Kevin.
hi Matt
yes took me some time to be converted, but for me with creaking bones🤣🤣there a god send to help on trying hills so you can enjoy a long ride, i turn off every where else
thanks for feedback
take care
Kev
Morning Kev.
Excellent work thinking it through.
Cheers Dan
and a late good morning to you too
take care
Kev
It's obvious that there is a speed limiter and it's based on the crank rpm. The magnets are used for triggering the PAS and for calculating the speed. Ie the controller looks for frequency of pulses. You add magnets and the frequency of pulses goes up and it licks out.(you hit the limit) Less magnets you would have to pedal faster to hit the pulses limit. I think if you put the six back on and gear down so the crank goes faster you will find it kicks out. Just my two bits worth.
cheers Bruce
all suggestions are worth the while, so thanks for the input, feedback and watching it's appreciated
regards
Kev
that's should not be true - the speed must be calculated by the rotations in the motor - you can have multiple gearing scenarios - the rpm of crank doesn't match the speed of the bike
Interesting experiment Kev. It's almost like it can't keep track of the magnets as you pedal faster. I'm still interested in the conversion, could be good for my commute.
Best wishes, Dean.
Cheers Dean
Yes, it's a nice little interesting project to help in your commuting, give it a go!! and shows us how you get on, no pressure!!!
Sticker shout out coming soon, when i embark on something completely different
take care
Kev
Gday Kev, you did well to figure this out, great job mate, cheers
Thanks 👍Matty
eventually the grey matter clicked in to place!!🤣
take care
Kev
i found that you have to put the magnets in the correct way EG pos and neg polarity try turning them around and see what i mean they all have to have same polarity the correct way🙂
cheers Nick
Yes i knew that with polarity
Did this a while back now and all is wprking fine
Thanks for the feedback👍👍
regards
Kev
@@MrFactotum yea i ended up using 6 magnets because i changed the controller for 48v battery
Sounds like your battery isn't supplying enough power..(.sometimes.Thats the same thing it will do when it's a battery issue )good luck to you.thank for the video
Thanks for the info and watching and feedback SFM3875👍
did that a couple of year ago now and all sorted, but thanks anyway
atb
Kev
Hi Kev. Very interesting. I think you are right about the controller. It is probably expecting a number of pulses in a certain range from the sensor. Too many magnets increases the the number of pulses and confuses the controller. Anyway, you got it sorted which is what matters. Cheers, Alan.
cheers Alan,
it's all about looking at any problem logically, you know where i am coming from👍👍👍👍😉😉
see you next time
Kev
if I use 8 magnets and I will change it to 12 magnets and of course my controller changes the parameters from 8 magnets to 12 magnets, is there a significant change?
I saw the conversion and it was very interesting But,I much prefer the larger engined bikes ! Good to see you again keep going😀.
hi steve
thanks for feedback, i know were your coming from, just like to spread my interests, so never time to be bored🤣🤣👍👍
another variation of interest coming up soon.
see you next time
take care
kev
Could some of the Magnets have there Poles incoŕrect wrong. Just a thought.
hi om2025
it's a while since this video, it's all sorted out now, but thanks for your input
regards
Kev
Kev,
I believe I know what the issue is... The controller has a cut out based RPM of the cranks based on the factory supplied number of magnets. So lets say the factory is 6 and you have 12 magnets fitted it will think your doing twice as many RPM than you are. So stick with 6 which works find on the flat and when you are on a hill change to a lower gear so you pedal faster and then it will kick in and all will be fine.
Cheers.
Paul,,
eyup Paul
Yes, great, well thought out, never thought of it as a rpm program problem, i think that's logical, it's always nice to get a fresh pair of eyes on a problem, when you have tunnel vision.
cheers
see you soon on something completely different!!!
take care
Kev
You need to set either 4,8 or 12 in the setting menu according to how many magnets your using.
eyup JB
Yes but i don't have that type with a screen and menu, just a on / off button, anyway it was sometime back now and its all sorted now, but thanks for the feedback
regards
Kev
@@MrFactotum sorry, I assumed you had a screen. Glad you sorted the problem. Take it steady! 🤘
@@jonniebeck1395 cheers JB no problem, always appreciate any advice you never know when you might need it
thanks again
atb
Kev
Useful info. I wonder if there is any documentation for the controller that says anything about the magnets.
hi Ben
no info what so ever, it's a lottery unless you buy a complete kit.
thanks for watching
don't know why this is, can you tell me, i've got you on sub, notifications, bell etc etc, just like everyone else, but your comments never come up in the notification bell box on my screen always find them in my yt studio home page comments!!!!!!
cheers
Kev
@@MrFactotum That's a pain. Experimentation is the only way.
Hey,Dean I have a Viribus trike I'm putting a 1000w front wheel on it. now I think I'm making a big deal out of. But do you have a video of you putting one on a old style pedaling crank. If not
maybe some some good advice. Thanks Ken
Sorry, no Ken
It's probably a bit late now, but the problem/issue is that you need to go into the configuration settings in the display menu and set it to the same number of magnets you're using 5/8/12
To do this, you'll need to hold down the (up & down) button at the same time for a few seconds to access factory settings. *Some display menu switch/buttons differ but are very similar* You can change speed restrictions, performance, and so much more too...
🚲
🙂👍
cheers NNA
I can't access any factory settings i i don't use any form of display, its just a basic diy kit, but managed okay with trial and error, thanks anyway👍👍👍
No matter what setting I put into the display, the pedal assist will work erratically. I will try to use a 5 magnets sensor instead of the one I'm using currently.
@@MrFactotumMy Voilamart 1500w kits the same, 8 magnets, I need to make some discs and get some of those magnets - or can you just buy these discs/mags online??
My kit has no display also, it didn't come with one, I just use my phone in a holder and a programme app called "Speedview"(great speed app, free too) and the stock 8 magnets disc...
I have the same problem on a hill you have to peddle too much before it kicks in...
Seems I'll have to get looking online to see if I can get a 12 or 16 magnets disc(?), would be better for me now I'm knocking on in years (haha) being 50 years young.
Interesting video, found it relaxing to watch too, cheers & all the best from across the pond here in the U.K.
@@mickyb.8014 thanks very much Mickyb, appreciate the feedback,
I would say if your ebike conversion came as a complete kit it should have the correct magnets. I made my kit up from different suppliers, so thats the main reason for my problems.
i'm not sure if discs with different magnets in are available as its a while since i did my conversion, biut i would think they should be, but like i said if yours was a complete kit i would suspect something else unless the one or more of the magnets in the disc are the wrong way (north and south), also mke sure the magnet disc is running true on the pedal crank, if it wobbles too far away from the sensor this could have an effect.
Hope this helps, good luck oh and i will check the speedview out.
regards
Kev
@@MrFactotum it's on right and magnets are fine, just I need it to kick in faster than half a full peddle turn, so I'm thinking double the small magnets from 8 to 16 may just do the trick, it's worth a try as it shouldn't cost much, appreciated.
you can setup in the display how many magnets it has and only put it higher and lower. like saying it has more or less magnets. also the assist motor strenght.
dint had to make your own, sorry to say.
hi j
thanks for the feedback, but i don't use a display so have to run how the controller is pre set. been a long time since this video and all soreted now with no display, to keep things simple and basic.
Regards
Kev
@@MrFactotum i have a question i have display LCD81F, how do you put the speed on every pass, like pass 1 it use 20% batt, pas 2 40% pas 3 60% pass 4 80% 5 100% ??? i can not find it anymoreq, i can not get into that mode again, can you help me ? i also will ask other people
@
Hi JM
Sorry can't answer that, i have never used a display, i keep things simple just use a controller, battery and on/off switch for the pedal assist and throttle, less to fiddle around with and less to go wrong
Thanks for the feedback
regards
Kev
if I use 8 magnets and I will change it to 12 magnets and of course my controller changes the parameters from 8 magnets to 12 magnets, is there a significant change?
hi B
well i found that mine would not work properly (especially on hills) with the incorrect number of magnets, but some controllers vary in different ways
Its going to be a case of try it and see
cheers👍👍👍
Kev
I think you just solved my problems...
I'm having another issue, the speed is only displayed if the motor starts turning. If I go downhill, the speed shows 0 km/h or mp/h whatever.
Also I get a speed displayed when I go in reverse (just going backward) despite it's a geared hub motor
thanks very much for the feedback glad it helped
I can't help with the speed as i don't have the instrument control panel on, i just use a cheap standard cycle mileometer
regards
Kev
Is your controller restricted to a certain speed as 12 magnets will register that the bike is going faster than 4 ..bike doesn't know what speed it's doing
hi
thanks for feedback, controller not restricted to a certain speed, been a while since i did the video, it's all working as it should now, but thanks for the suggestions.
ATB
Kev
I'm having problems with my pedal assist sensor hence why I'm watching your video about to give it a clean and do some problem solving the joys of e bikes..my throttle is working but pedal assist is not ..
I'm sorry Dean, I'm talking about putting a P A S. Switch on the Viribus trike. Thanks Ken
Go for it!
Normal in assistant to tot km/h Is disactived engine
ok i will have to take your word for that👍👍👍
Just needs changing in settings on controller
ok cheers, thischeap controller can't be changed
but thanks anyway👍👍
WELL MY FRIEND ,YOU LOOK TO BE IN VERY GOOD CONDITION.YOU MIGHT DO BETTER ON A SKINNY TIRE BIKE,BUT I CAN SEE THE ATTRECTION OF ELEC... ASSEST.
GOOD DAYS TO YOU AND YOURS, FROM ME AND MINE.
hi KZ🤣🤣👍👍👍👍
Thanks for feedback, you might find an attraction to them if your fuel was a costly as over here🤣🤣😉😉 see you next time
take care
Kev