Hello every one
recent member in esk8 forms and fist time crating new topic hop itās in the wright place
Ben reading / gathering info for my build, wanted to get your advise and guidance on my planed/aims/setup for this projectā¦
i want to build an e-long-board for every day us, going to work or college or just simply buying groceries
my aim:-
Dual motors long-board, Arduino drive and remote controllered.
is to have reach 50 km/h
āā I know some of you might say thatās extremely fast but i would like to experience and feel that speed"
Iām aware that i wont be always going that fast but still would love to have that option when i have the chance āā and on papers calculation would be 50 but in real life it wont reach that speed
of course safety comes first so Protective gear will be in my list
Range wanted to be, i would say about 10 - 20 km āā is that possible or is that reasonable? / can it be more?āā
Thisās my list to buy so far āā would this work for what Iām aiming for? āā
2- 2 x 50mm 270KV motorās
Caliber 184mm trucks replacing the pairs trucks that comes with the board
āāitās hard to find motor mountās that can work with pairs trucks, itās unfortunate and i cant make DIY no access to toolsāā
Enertionās Motor Mount āā any recommendations for EU shipping ? avoiding paying Duty āā
Motor Pulley 15t Pulley āā not sure of diameter? perhaps depends on the motor shaft āā
Drive Hub or wheel Pulley 36t
2x Arduino Uno board āā or one Arduino can be enough for two motorās ? āā
2x ESCās āā any recommendations ? āā
SPACE cell 10s3p lion Battery
āā not sure if this Battery would work as i got very confused on how to calculate the total power demand by all of the electrical components while reaching power need to my aims āā
9mm Belt i would say ?
RunPlayBackās Sulaco v1 Enclosure
Iām sure i need some sort of cables to connect all of the components?
Thatās all i can think, I need and required to start working
sorry if i semis to be asking a lot from you guys but i really need your help and guidance on how to approach my desired e-board ā¦
Thank you all in advanced
looking forward chatting and connecting with all of you
my salute to all
Ciscotory
I would try to stick to 190kv or less if you want ot use a 10s battery. 50 or 63mm
Your ESC needs to be picked before you pick battery. VESC is my suggested and will handle 10s if you stay below 190/200kv motor (avoiding >60k ERPM).
Enertion mount is really simple and works really well. I also like the DIYes. More adjustable angles as a bonus.
I like 14/36 or 14/40 - but since you want speed, you might go with 15/36. Definitely stick to 8mm motor shafts so you can easily get gears to fit. I have one 10mm shaft motor and itās a PITA to find gears w/o custom from online places for $$.
Definitely dual 9mm belts or even better dual 12mm (more contact area and less skipping under hard acceleration/braking).
Iām kinda āold schoolā and would suggest the GT2b over Arduino. Much more proven, and when going fast - last thing you want is to lose connectivity/control!
know how to solder? have a decent adjustable soldering iron/station? making your own custom length cables really helps keep it clean w/o āspaghettiā wiring being a clutter underneath or in your enclosure (also restricts airflow for cooling).
Youāre definitely on the right track!
I would second @sl33py: 190kv motors and VESCs to drive them. Weāre pretty biased towards the VESC around here cause it works pretty well once set up.
Iām not sure I understand what youāre planning on doing with the Arduinos, but I think trying to use them will just complicate things. If you were hoping to use them as your remote as @sl33py mentioned, I would caution against that even more, at least on your 1st board. The GT2B (any any of the modifications for it) are the most reliable. If you want something a little different, I think the most I can recommend is the NunchuckRF (what I went with personally).
With your top speed it will really come down to gearing. How steep are the hills around you? Thereās some tradeoff between top speed and torque (which affects your hill climbing ability and your acceleration). Iād personally recommend that you aim for a bit lower speed and then later on change your gears and possibly belt if youāre really craving more. Thatās just me
Youāre battery should be fine. I think youāll be able to get 10-20km of range with that, but if you have the budget, Iād get a larger parallel count like 10s4p. That will secure that range a little better.
sl33py thank you very very much you really helped me a lot
thisās the first time i found out that ESC and VESC are not the same thing
If itās not asking to much, I have few more questions
my chose of 2x 50mm 270kv motorsās was that an over-overkill ?
is it perhaps they require more volt and would drain out the battery fast? and if iām going to us them is that too much, and would it required a bigger battery?
I forgot to mention that i do have access to 3D printing machine, perhaps i can search and try to make DIY mount
but not sure how it would be durable and last for long time? and i found it takes a long time to design partsā¦
I think ill change to your recommendation on pulleys of 14/36 or 14/40, i believe this would give more torque with reasonable speed, and i can change gears to increase speed when ever i want grat tip thansk.
using dual belts would that might cause the belts to tangle over each other when operating, do you know if there are belts that are more wide to increase concoct area?
Thanks again for your help and time
really appreciate it ā¦
3 - so there are a few speed calculators out there, but here are some examples:
190kv 10s 16/36 80mm kegels
190kv 10s 16/36 73mm wheels
So a single 6355 190kv 10s 16/36 with 80mm+ wheels will give you 50kph (Iāve personally hit 45kph on a 12s version of this setup while at 70-80% duty cycle, still room to go!)
You might have clearance problems with 14/40 on 72mm wheels - a 40t pulley is around 65mm in diameter so thatās getting pretty close to the ground there. 14/40 on 190kv 10s 72mm will only give 38kph, 14/40 on 260kv and 73mm wheels will give you 50kph, but the VESC canāt handle the high RPMs. Thatās why a lot of guys go for 190kv or lower motors with taller gearing. Itās the same thing really - in the end itās the wattage of the motor that matters and a 63xx will put out more total power than a 50xx motor.
4 - Dual belts, one on each wheel, not together. 9mm wide belts were popular but broke somewhat frequently so a lot of guys switched to 12mm wide htd5 belts and they handle the power nicely. 15mm is standard but two 6355s wont fit side by side on standard 180mm trucks with 15mm belts, so thatās where the 12 comes from.
5 - range - Iāve been averaging 10 watt hours per kilometer, so you can easily hit a 10-20km range with a moderate size battery. I went 40 kilometers on a full charge last weekend and still had some charge left.
Thank you also for the great info and help you guys are the best
ill give you some info on me iām 172 cm and 85 kg in wight, in the heavy category
regarding how steep are the hills iām not sure but donāt think it would be gradient of more than 15% even a bit lessā¦
iām differently going to use your tip of aim for bit lower speed and change when desire
thatās a great advice thank youā¦
If itās not asking to much, I have few more questions for you as well
the reason i wanted to you Arduinos because i thought i can fully control my e-board with out using VESC or ESC as this will reduce electric components, do you think thatās possible?
and to answer your question yes i want also to us it to connect the Controller receiver
Iāve been searching and still looking online for builds with Arduinos or other micro-controllers like raspberry pi
i believe these micro-controllers have a lot of functions and advantages, for example i want to add LED lights for front and tail lights to my board at a later stages as extra as this could be a possible feature or any fun
can it be possible to increase the board rang to more than 20? and how this could be done ? so to make long rids
Thanks again for your help and time
really appreciate it ā¦
Vedderās ESC = VESC. An amazing creation and really cool he built this. As an option to the car ESCāsā¦
Good question. Itās not overkill, but the higher kv wonāt work well for e-sk8. You want lower kv if possible. Itās not really about drain and volts - more about limitations of the VESC and itās ERPM limits. Your motor ERPM needs to stay below 60,000 ERPMs to avoid damaging the DRV chip on the VESC. So as a general rule you want to stay <200kv - but you can use 270kv motors if thatās what you have - itās less ideal, but youād have to use a lower voltage battery setup (maybe 6s - and possibly up to 8s (running speed calc)).
a 3d printed motor bracket will not work. Yes i know someone somewhere has gotten one to workā¦ but letās just skip to making one from aluminum/metal, or purchasing one from a vendor or fellow builder here.
Iāve used 3d printed wheel pulleysā¦ they work pretty well and if you can make your own as they wear - a great option!
If you want to gear down, i would go with a lower kv motor first, before lower gears like this. 14/36 or 14/40 should work really well.
the belts are on each side, so donāt cross - no issue with them tangling. Dual 9mm will work, but iād suggest dual 12mm. The kits from both Enertion and DIYes both are 12mm i believe, but please double check.
I would still caution you to stick to an ultra-reliable GT2b or similar. You can them move into 3d printed enclosure pretty easily (I have an old writeup you can look at to see complexity - not too bad):
When you are going 30-50kmh you do not want to have any control issues (loss of acceleration/braking), because at those speeds your reaction times are so fast and any error could be a serious injury (wear protective gear appropriate for the speed you intend to go).
Easy to add on. Several folks have LEDās including some addressable LEDs. Do some searching and youāll find some options.
the easiest way to increase range is add capacity (more battery Wh). A general rule of thumb - for every 10Wh you will get 1km. To get Wh, take your Ah x voltage = Wh. Easy math example - 10s (36v) 5000mAh = 5 * 36 = 180Wh. /10 = 18km
I had to check the SPACE cell specs, but it looks like 270Wh / 10 (every 10 = 1km) = 27km. Now this is an estimate - and hills, or a heavier rider, or even hard acceleration will decrease your range. Also kicking to start, not accelerating super hard, etc - can all extend it slightly too.
@ciscotory Iām very impressed with the way you all guys build your own electric skateboards, it is definitely the best way to customise it to your needs
Off-Topic: Will you be joining the meetup in Dublin for a ride the 13th of May or any other future rides? Check out my profile for the link
hop itās in the wright place
Ben reading / gathering info for my build, wanted to get your advise and guidance on my planed/aims/setup for this projectā¦
but i would like to experience and feel that speed"
Iām aware that i wont be always going that fast but still would love to have that option when i have the chance āā and on papers calculation would be 50 but in real life it wont reach that speed
of course safety comes first so Protective gear will be in my list 
my salute to all
Ciscotory
you really helped me a lot 
thisās the first time i found out that ESC and VESC are not the same thing 
?
is it perhaps they require more volt and would drain out the battery fast? and if iām going to us them is that too much, and would it required a bigger battery?
grat tip thansk.
you guys are the best
ill give you some info on me iām 172 cm and 85 kg in wight, in the heavy category 
regarding how steep are the hills iām not sure but donāt think it would be gradient of more than 15% even a bit lessā¦
thatās a great advice thank youā¦