Search found 79 matches

by kcuf
Mar 18 2019 2:14pm
Forum: E-Bike General Discussion
Topic: hub motors, have you broken your rim/spokes yet
Replies: 3
Views: 39

Re: hub motors, have you broken your rim/spokes yet

large diameter rear hub lace

bicycle rims spokes

sucks

almost always added dish

sucks worse



personal 250lb

best components maintenance

begin breaking 5k 7k miles street



nearly trouble free rear hub motor

moped moto supplies

trade off

expensive heavy no rim brake
by kcuf
Mar 18 2019 11:24am
Forum: E-Bike Technical
Topic: Hub motor won't spin no matter what i do
Replies: 5
Views: 53

Re: Hub motor won't spin no matter what i do

everything connected and powered confirm 5v red to black next measure voltage from each small colored wire to black ground turning wheel slowly do the voltages change as rotated disconnect everything motor rotate freely no wires touching now try touching each thick phase wire to another motor harder...
by kcuf
Mar 17 2019 10:45pm
Forum: General Discussion
Topic: Legends dropping like flies
Replies: 226
Views: 26603

Re: Legends dropping like flies

dick dale rip
by kcuf
Mar 17 2019 9:49am
Forum: Resources & EV Related Parts and Services
Topic: New or Rebuilt Lithium-Ion Battery Service
Replies: 24
Views: 807

Re: New or Rebuilt Lithium-Ion Battery Service

asked for references job photos

ignored

spamming forum is getting old
by kcuf
Mar 17 2019 9:47am
Forum: E-Bike Technical
Topic: Could I use 36 V on a 24 V Sunstar kit?
Replies: 2
Views: 41

Re: Could I use 36 V on a 24 V Sunstar kit?

what he said

maybe open controller

check if 50v caps

if so may work fine

other than lvc
by kcuf
Mar 15 2019 12:55pm
Forum: E-Bike Technical
Topic: Calculating Battery Life based on voltage
Replies: 12
Views: 189

Re: Calculating Battery Life based on voltage

some folks ride 20wh/m

most dont or won’t

cell age ambient temps

terrain wind soc

use of legs desired speed

all contribute

good luck
by kcuf
Mar 15 2019 11:53am
Forum: E-Bike Technical
Topic: Info on this Lyen controller ?
Replies: 8
Views: 89

Re: Info on this Lyen controller ?

what i say 3077 doesn't really matter look it up yourself no probing shunt insert amp meter between battery controller spin wheel off ground should pull around 2A many multi meters handle 10a less accurate simpler just estimate 2a wheel off ground adjust ca shunt based on that estimate have a nice day
by kcuf
Mar 15 2019 11:31am
Forum: E-Bike Technical
Topic: Info on this Lyen controller ?
Replies: 8
Views: 89

Re: Info on this Lyen controller ?

fully charged 18s

ragged edge v max 3077

of course load will drop voltage

do you feel lucky

measure battery amps

small amp load fine

spin wheel open air maybe 2a

or simply rig dummy load

adjust ca shunt value to match

external amp meter measurement

future reference jot down
by kcuf
Mar 15 2019 11:25am
Forum: E-Bike Technical
Topic: Calculating Battery Life based on voltage
Replies: 12
Views: 189

Re: Calculating Battery Life based on voltage

many variables estimate voltage vs % remain differences between loaded and resting voltage measurements cell chemistry bms oddv numbers from my ass 16s pack around 46 48v loaded minimum it should probably go soc voltage roughly between 67 and 50 52v resting if linear usually not careful discharge me...
by kcuf
Mar 15 2019 9:53am
Forum: E-Bike General Discussion
Topic: Modifying a DD hub motor.
Replies: 25
Views: 893

Re: Modifying a DD hub motor.

in your other thread
by kcuf
Mar 15 2019 9:51am
Forum: E-Bike Technical
Topic: Fat tire speeds
Replies: 24
Views: 459

Re: Fat tire speeds

i say worrying about nothing

enjoy your nicely built ride
by kcuf
Mar 15 2019 9:47am
Forum: E-Bike Technical
Topic: Info on this Lyen controller ?
Replies: 8
Views: 89

Re: Info on this Lyen controller ?

web search edward lyen

3077 will tolerate 16s 67.2v

up to 75v no 21s

calibrate shunt value use external power meter
by kcuf
Mar 14 2019 9:39am
Forum: E-Bike Technical
Topic: Fat tire speeds
Replies: 24
Views: 459

Re: Fat tire speeds

250 lb rider

front fat tire 10-12 psi

rear fat tire 12-15 psi

soft comfy ride quality

no complaint or problems
by kcuf
Mar 13 2019 10:26am
Forum: E-Bike Technical
Topic: Fat tire speeds
Replies: 24
Views: 459

Re: Fat tire speeds

dunno any rating

25 30 mph is about as fast will cruise on 4 or 5 inch tires

have touched 35 downhill and all seemed fine

fairly noisy at higher speeds
by kcuf
Mar 13 2019 10:19am
Forum: E-Bike General Discussion
Topic: First conversion kit
Replies: 19
Views: 437

Re: First conversion kit

1000s miles on many bbsxx drives no faults practical power limits much different than hub motors apply hub power applications and suffer failures observe continuous power rating trouble free service rear hub motor very weak imperfect bicycle wheel troublesome to repair spokes flats tailored for only...
by kcuf
Mar 12 2019 11:47am
Forum: E-Bike General Discussion
Topic: First conversion kit
Replies: 19
Views: 437

Re: First conversion kit

bbsxx use sine wave controllers
by kcuf
Mar 12 2019 9:41am
Forum: General Discussion
Topic: Legends dropping like flies
Replies: 226
Views: 26603

Re: Legends dropping like flies

hal blaine rip....
by kcuf
Mar 08 2019 4:51pm
Forum: E-Bike Technical
Topic: Reducing 55V charger down to 54.6V
Replies: 14
Views: 325

Re: Reducing 55V charger down to 54.6V

no previous mention controller

suggest t10a100l for 10a charge

schottky if you want

not what i would use
by kcuf
Mar 08 2019 3:51pm
Forum: E-Bike Technical
Topic: Help about Controller
Replies: 4
Views: 133

Re: Help about Controller

understand nominal battery voltages

lifepo4

3.2v nominal

3.65v full top charge

even your charger description states 6s

3.7v nominal 18650 full top charge 4.2v
by kcuf
Mar 08 2019 12:03pm
Forum: E-Bike General Discussion
Topic: Power cutting out around 90% charge
Replies: 6
Views: 164

Re: Power cutting out around 90% charge

bms seems likely

agree open battery to verify cell groups
by kcuf
Mar 08 2019 9:46am
Forum: E-Bike Technical
Topic: Help about Controller
Replies: 4
Views: 133

Re: Help about Controller

motor controller compatible

8s life need charger capable of 29.2v

6s 25.2v charger not compatible imo
by kcuf
Mar 08 2019 9:37am
Forum: E-Bike Technical
Topic: Reducing 55V charger down to 54.6V
Replies: 14
Views: 325

Re: Reducing 55V charger down to 54.6V

not fan of schottky for job

p-n cheap and durable t10a100l

charge current determines max amp

do not cut leads when pushing amp limit
by kcuf
Mar 08 2019 8:39am
Forum: E-Bike General Discussion
Topic: 16,000mah lipo packs, help me pick from two charging options
Replies: 11
Views: 329

Re: 16,000mah lipo packs, help me pick from two charging options

meanwell cc cv power supplies

bulk plus occasional rc balance charging

always safe fireproof location

further convenience add small bms charge only
by kcuf
Mar 08 2019 8:28am
Forum: E-Bike Technical
Topic: Reducing 55V charger down to 54.6V
Replies: 14
Views: 325

Re: Reducing 55V charger down to 54.6V

large diode in series will drop .7v