Search found 791 matches

by Overclocker
Sep 23 2022 1:06am
Forum: EBike General Discussion
Topic: what multimetre should i choose for present cell mesurement and future home task
Replies: 31
Views: 555

Re: what multimetre should i choose for present cell mesurement and future home task

best combination is an ultracompact "card" type dmm w/ fixed leads so you don't accidentally leave it in the 10A socket :lol:

plus a DC clamp meter. make sure it's DC, cheaper ones can only measure AC
by Overclocker
Sep 07 2022 9:52pm
Forum: EBike General Discussion
Topic: Transporting heavy ebikes - show me your solution
Replies: 71
Views: 3457

Re: Transporting heavy ebikes - show me your solution

litetrail.jpg
litetrail.jpg (256.08 KiB) Viewed 246 times
just built a flat trailer. very lightweight. thin-wall 2x2 frame (1.2mm wall). spoked wheels with square profile motorcycle tires

just need wheel chocks, rivnut them onto the frame. could probably carry 2 or 3 surron-type ebikes
by Overclocker
Sep 05 2022 5:57am
Forum: General Discussion
Topic: Advice Please -What solder station?
Replies: 11
Views: 223

Re: Advice Please -What solder station?

IMG_20211010_224331.jpg
IMG_20211010_224331.jpg (156.25 KiB) Viewed 125 times
cordless is the way to go. i'm powering this one with a ryobi battery. you could solder a 12ga wire to an XT90 with this
by Overclocker
Aug 21 2022 9:58am
Forum: Bike Mechanical & Structural
Topic: play in front forks
Replies: 9
Views: 400

Re: play in front forks

im thinking my forks internals are more like these than fox shocks. https://www.youtube.com/watch?v=BIJPeh-D8D4. i cant see anything else in that vid thats a bushing except the dust seals. I'm wondering what he means by plastic sleeves: https://youtu.be/BIJPeh-D8D4?t=551 good forks use bushings mad...
by Overclocker
Aug 14 2022 10:30am
Forum: Motor Technology
Topic: QS motor shaft wear
Replies: 17
Views: 1440

Re: QS motor shaft wear

20210730150021_579.jpg
20210730150021_579.jpg (350.97 KiB) Viewed 215 times
seems like they changed the shaft a bit...
by Overclocker
Jul 12 2022 9:50pm
Forum: Stand-up EScooter/ESkateboards
Topic: Help with material selection
Replies: 3
Views: 310

Re: Help with material selection

269741030_5466038773411184_6784245297462307388_n (1).jpg i built this w/ mild steel :lol: you could definitely build a lighter frame w/ chromoly using thinner wall tubing which is more difficult to weld, may need TIG w/ less readily available filler rods mild steel is easy to weld w/ MIG using off-...
by Overclocker
Jul 10 2022 2:39am
Forum: EScooters/EMotorcycles
Topic: Seeking advice on a no weld motorcycle/scooter.
Replies: 12
Views: 709

Re: Seeking advice on a no weld motorcycle/scooter.

IMG_20220218_172837 (Medium).jpg yeah get gas. i started off w/ fluxcore and it was just a waste of time. just had this small 15lb co2 tank refilled last week for Php300 or US$5 :shock: lasted more than a year w/ the kind of hobby-type welding that i do the welder is the cheapest one i could get ph...
by Overclocker
Apr 10 2022 3:23am
Forum: EScooter/EMotorcycle Build Threads
Topic: Light dirt bike, QS 120 70h motor, custom steel frame
Replies: 224
Views: 57659

Re: Light dirt bike, QS 120 70h motor, custom steel frame

What about regeneration? How does it work with your settings? Activation only by braking or also when releasing the throttle? there's a little bit of regen when you release the throttle. then i use a momentary push button switch to activate stronger regen (low-brake wire (gray/black) and ground (bl...
by Overclocker
Apr 08 2022 10:12pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Light dirt bike, QS 120 70h motor, custom steel frame
Replies: 224
Views: 57659

Re: Light dirt bike, QS 120 70h motor, custom steel frame

my votol arrived in some kind of "park mode" and woudln't even spin the motor. needed some very obscure settings that you'll never figure out w/o reading through that long votol thread then the config program is very buggy. erratic results w/ certain combinations of values but if you get ...
by Overclocker
Apr 07 2022 9:56am
Forum: EBike Build Threads
Topic: xKillah - Enduro eBike
Replies: 96
Views: 9236

Re: xKillah - Enduro eBike

I did some accelaration shot to tune the controller. The knobby tires does not provide good traction on street. However it can easily win on 0-60km/h vs my KTM 350... it's insane I still have RPM limited to 75%. I should arrive to 85Km/h max speed with this sprocket size (48t). Some video coming so...
by Overclocker
Mar 31 2022 8:51am
Forum: EBike General Discussion
Topic: Thermal compound W/mk rating BS
Replies: 14
Views: 901

Re: Thermal compound W/mk rating BS

thermal paste is supposed to fill the micro voids between 2 flat smooth surfaces with as thin a layer as possible. so viscosity and particle sizes have to be low to allow it to spread and for excess material to squeeze out if necessary don't be deceived by w/mk ratings. a block of silver has high w/...
by Overclocker
Mar 16 2022 9:49am
Forum: General Discussion
Topic: A welder thread
Replies: 15
Views: 892

Re: A welder thread

The more co2 the wider and shallower the weld. More argon gives a narrower and deeper weld. I have seen a good example in the advertisement for different blends from a manufacturer some time, but I dont know where to find it. But here are some basics: https://weldinganswers.com/effects-of-shielding...
by Overclocker
Mar 16 2022 6:01am
Forum: General Discussion
Topic: A welder thread
Replies: 15
Views: 892

Re: A welder thread

j bjork wrote:
Mar 16 2022 5:20am
Overclocker, you get bad penetration with co2.
Get a good mix gas and it will be a different story.

haha no, actually you get better penetration w/ pure co2 than w/ c25 mixed gas

ever wondered why 6010/6011 dig so much? it's the cellulose flux that generates, you guessed it, co2
by Overclocker
Mar 16 2022 4:46am
Forum: General Discussion
Topic: A welder thread
Replies: 15
Views: 892

Re: A welder thread

IMG_20220223_174720 (Medium).jpg this MIG is Php8000 (us$160). also known as Sherman MIG Speedy 200. i'm using a small co2 tank (100% co2). thin 0.6mm (0.023") wire is great for building ebike frames and such. yeah welding w/ gas is so much better especially for thinner materials. fluxcore ten...
by Overclocker
Feb 28 2022 10:44pm
Forum: Bike Mechanical & Structural
Topic: Thai drag bike tires.
Replies: 26
Views: 1451

Re: Thai drag bike tires.

IMG_20220301_113442 (Medium).jpg
IMG_20220301_113442 (Medium).jpg (185.4 KiB) Viewed 1159 times
these are very common here in southeast asia. i got one on my DD hub. 2.75 x 17. on a narrow 1.4 rim, they don't even make rim locks for rims this narrow :lol: had to shave down a 1.6 rim lock

btw this tire costs like us$ 10
by Overclocker
Feb 14 2022 2:18am
Forum: Battery Technology
Topic: Air-cooled for 18650 Li-ion battery pack
Replies: 29
Views: 982

Re: Air-cooled for 18650 Li-ion battery pack

well, the real answer is still that if you need to cool the battery, you are pushing it too hard and need a bigger battery, or a better one. that idea only applies to low-power ebikes. once the application requires high-performance and battery longevity then you need consider battery cooling which ...
by Overclocker
Feb 14 2022 12:18am
Forum: Battery Technology
Topic: Air-cooled for 18650 Li-ion battery pack
Replies: 29
Views: 982

Re: Air-cooled for 18650 Li-ion battery pack

https://i.imgur.com/e2tDGzF.png here's another tip for you. if you'll notice i got 2 separate battery packs w/ a bit of air gap in between. so the inner walls of the battery cases can be made from the perforated "speaker grill" material i showed earlier. so you can have a bit of passive c...
by Overclocker
Feb 14 2022 12:08am
Forum: Battery Technology
Topic: Air-cooled for 18650 Li-ion battery pack
Replies: 29
Views: 982

Re: Air-cooled for 18650 Li-ion battery pack

it's a small 1.1kwh

you can't wash this bike w/ a pressure washer, but i've ridden it in the rain
by Overclocker
Feb 13 2022 11:11pm
Forum: Battery Technology
Topic: Air-cooled for 18650 Li-ion battery pack
Replies: 29
Views: 982

Re: Air-cooled for 18650 Li-ion battery pack

IMG_20210805_130849.jpg
IMG_20210805_130849.jpg (293.03 KiB) Viewed 556 times
IMG_20210820_225822 (1).jpg
IMG_20210820_225822 (1).jpg (180.51 KiB) Viewed 556 times
this battery really doesn't get hot so this is just the bare minimum of battery cooling. basically i just don't want to trap heat i.e. have a way for heat to get out
by Overclocker
Feb 13 2022 1:59am
Forum: EBike General Discussion
Topic: Transporting heavy ebikes - show me your solution
Replies: 71
Views: 3457

Re: Transporting heavy ebikes - show me your solution

vcarrier.jpg
vcarrier.jpg (389.13 KiB) Viewed 1416 times
wheels are dangling in the air. the pedals are just U-bolted (w/ nylock nuts) to the plate that the bike is sitting on. the ratchet strap prevents seesawing
by Overclocker
Jan 10 2022 1:34am
Forum: Bike Mechanical & Structural
Topic: Help with disc thickness? BR-MT200
Replies: 18
Views: 754

Re: Help with disc thickness? BR-MT200

The mounting points on the fork remain the same, but the lever acting on them becomes longer when you use a larger rotor. So if the caliper is moved 20mm straight out with an adapter, which part here experiences higher loading? disc-brake.JPG bosses get higher load but mostly compressive forces (se...
by Overclocker
Jan 07 2022 10:10pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Light dirt bike, QS 120 70h motor, custom steel frame
Replies: 224
Views: 57659

Re: Light dirt bike, QS 120 70h motor, custom steel frame

269592171_5466037800077948_8251450751782678783_n.jpg
269592171_5466037800077948_8251450751782678783_n.jpg (168.48 KiB) Viewed 1344 times
honda CRF couldn't keep up
by Overclocker
Dec 24 2021 10:25pm
Forum: EScooter/EMotorcycle Build Threads
Topic: Light dirt bike, QS 120 70h motor, custom steel frame
Replies: 224
Views: 57659

Re: Light dirt bike, QS 120 70h motor, custom steel frame

vcarrier.jpg
vcarrier.jpg (389.13 KiB) Viewed 1508 times
built a carrier for this bike. it's just clamped down at the pedals using U-bolts
by Overclocker
Nov 26 2021 9:45pm
Forum: EBike Build Threads
Topic: Aluminum frame for QS120 (illegalbike) ??W / ??kg
Replies: 17
Views: 2139

Re: Aluminum frame for QS120 (illegalbike) ??W / ??kg

IMG_20211118_172439 (Medium).jpg QS120-70h is perfect for a lightweight build. the best thing about it is the low kv=38 so single-stage reduction is sufficient. qs138 requires a 2-stage (super big rear sprocket not recommended for off-road) i'm using 17s pack. 11t motor sprocket, 56t rear on a 17x3...
by Overclocker
Oct 26 2021 9:36am
Forum: EBike General Discussion
Topic: Micargi Seattle SS
Replies: 38
Views: 351

Re: Heat Factor of an Ebike Controller

Image

this is a kelly kls7212s inside a steel box frame (vector light). needed to be heatsinked to the frame to prevent overheating (error code 2,3). a basic controller would probably just cook itself