Search found 2129 matches

by E-HP
May 11 2021 10:42pm
Forum: EBike Technical
Topic: What is the 3 pin motor connector called? (the sensor cable, and is it compatible with 6 pin version?)
Replies: 9
Views: 264

Re: What is the 3 pin motor connector called? (the sensor cable, and is it compatible with 6 pin version?)

You really should use the finger to show a picture of YOUR motor cable, with its three bullet connectors and a three pin JST connector. My guess is that the finger will be in constant use until at least after the next election. If the incumbents win, it could be several more years. Absent actual pi...
by E-HP
May 11 2021 10:26pm
Forum: EBike General Discussion
Topic: speed relationship between wheel and bike
Replies: 12
Views: 291

Re: speed relationship between wheel and bike

There can’t be a formula that will be exact. First you bother about meaningless factors like steering angle and camber, because bikes don’t need steering to turn or, if little of it they ever do, it is a slight counter steering that initiate the turn. Bikes need steering to turn, only at very low s...
by E-HP
May 11 2021 12:16pm
Forum: Bike Mechanical & Structural
Topic: 20Ah batteries instead of 30Ah?
Replies: 2
Views: 106

Re: 20Ah batteries instead of 30Ah?

I have a Daymak 72v-30Ah electric scooter and the batteries are worn out. Can I install 20Ah battery? The 30Ah are very expensive and much heavier. I know that the autonomy will be less, but in the month it will work! here is a picture of my scooter controller https://i.postimg.cc/ZvtZSh1c/20210505...
by E-HP
May 10 2021 10:21pm
Forum: EBike General Discussion
Topic: KT controllers, can you configure watts delivered at various levels?
Replies: 7
Views: 199

Re: KT controllers, can you configure watts delivered at various levels?

The ebay details says it comes with the LCD3 and dual voltage controller. I've owned a lot of the LCD3's. It has 5 PAS levels, but while you can configure it (using the C5 parameter) anywhere from 50% to 100% of the rated current, the setting applies to all 5 PAS levels, and does not affect the thr...
by E-HP
May 10 2021 12:02pm
Forum: EBike General Discussion
Topic: How does ANT BMS balance the battery pack and how long does it take?
Replies: 7
Views: 153

Re: How does ANT BMS balance the battery pack and how long does it take?

You can charge the bad group via the balance leads but unplugging the bms and tap into the leads for that group. If you use a lipo or other charger, where you can set the voltage and charge current, then set it to 4.2V and ~2A charge current and monitor the voltage until it matches the others.
by E-HP
May 10 2021 9:42am
Forum: EBike General Discussion
Topic: speed relationship between wheel and bike
Replies: 12
Views: 291

Re: speed relationship between wheel and bike

Hello everyone, I am a student from Taiwan and I am wondering:.... PS: Assume that two wheel's speed are synchronous . ...will the wheels still remain the same RPM ? Are you changing the assumptions? Does this bike have both wheels on the ground so the wheels spin at the same rate, or is it flying ...
by E-HP
May 09 2021 10:31am
Forum: EBike General Discussion
Topic: Replace a BMS in 52v 20 ah battery pack
Replies: 5
Views: 163

Re: Replace a BMS in 52v 20 ah battery pack

OK, after reading through the lamenting about your soldering skills, complaining about the country you live in, and the sentence or two related to your batteries, I think I've figured out what you may be asking for help on, in order, based on your post: 1. Ya, your soldering sucks. You should practi...
by E-HP
May 07 2021 10:47pm
Forum: EBike Troubleshooting
Topic: Puzzling problem - help!
Replies: 2
Views: 94

Re: Puzzling problem - help!

Figured it out: If the PAS is set to zero on the display, the throttle won't work by itself. In all this time, I never encountered that issue. I suppose, by luck, I always had it randomly set to something else and rarely had reason to alter it. I think you want P4=0, C4=0 to have throttle all the t...
by E-HP
May 06 2021 11:43pm
Forum: EBike Technical
Topic: Wheelie/Stability Control via E-Brake Circuit?
Replies: 4
Views: 113

Re: Wheelie/Stability Control via E-Brake Circuit?

fatty wrote:
May 06 2021 5:29pm
Thoughts?
I'd rather stay in full control. For instance, if I'm trying to cross a busy street/intersection, I'd rather ride out the wheelie than have the motor stop in the middle of the road.
by E-HP
May 06 2021 10:35am
Forum: EBike Technical
Topic: Do some motors have more/less torque with the same power levels?
Replies: 36
Views: 851

Re: Do some motors have more/less torque with the same power levels?

It wouldn't. Torque is a function of torque constant (Kt) in Nm/A, amps, and gearing. The Mini is geared with 9.55:1 primary torque multiplication, whereas the 3000 is geared with 6:1 primary torque multiplication, but the 3000 probably has higher Kt to compensate. So if you use the same controller...
by E-HP
May 05 2021 10:47pm
Forum: EBike Technical
Topic: Do some motors have more/less torque with the same power levels?
Replies: 36
Views: 851

Re: Do some motors have more/less torque with the same power levels?

I'm shopping for a new motor and I'm quite confused on the amount of torque a motor has. In my case, my old motor was a mini cyclone or cyclone 1680w and I'm looking to upgrade to the 3 kw cyclone. I keep hearing that the cyclone 3000 has a lot more torque. If I use the same power motor controller ...
by E-HP
May 05 2021 2:43pm
Forum: Bike Mechanical & Structural
Topic: Welding down a torque arm
Replies: 42
Views: 784

Re: Welding down a torque arm

RTLSHIP wrote:
May 05 2021 6:49am
In reality, buying a decent $1000. integrated bike will eliminate these problems.
Are you talking about an ebike?
by E-HP
May 04 2021 3:47pm
Forum: EBike Troubleshooting
Topic: Installing Pedal Assist Sensor - How far from the sensor should the magnet be?
Replies: 6
Views: 143

Re: Installing Pedal Assist Sensor - How far from the sensor should the magnet be?

They should line up, They should be as close as possible without rubbing together. You photo is useless for diagnosing the problem, since you can't zoom in enough to see what's going on with your PAS. Whoops, I forgot to upload the photo. This is what it looks like - I did bend the bracket a bit so...
by E-HP
May 04 2021 2:31pm
Forum: EBike Troubleshooting
Topic: Installing Pedal Assist Sensor - How far from the sensor should the magnet be?
Replies: 6
Views: 143

Re: Installing Pedal Assist Sensor - How far from the sensor should the magnet be?

I just picked up a MP5 with pedelec along with a 52v Luna battery to replace my borked Tidalforce hub on my Montague Paratrooper. Everything is working right now except for the pedal assist. I'm wondering how far the sensor has to be from the magnets, and if the magnets have to be perfectly centere...
by E-HP
May 04 2021 2:24pm
Forum: EBike Technical
Topic: What is the 3 pin motor connector called? (the sensor cable, and is it compatible with 6 pin version?)
Replies: 9
Views: 264

Re: What is the 3 pin motor connector called? (the sensor cable, and is it compatible with 6 pin version?)

TuomasK wrote:
May 04 2021 2:04pm
Without picture impossible to say for sure but could it be z916 connector?
Maybe the finger that's usually used to take a picture is already busy signaling the lawmakers?
by E-HP
May 03 2021 9:31pm
Forum: EBike General Discussion
Topic: Custom fiberglass / carbon frame battery case
Replies: 8
Views: 415

Re: Custom fiberglass / carbon frame battery case

A lot of epoxies are fortified with metal (steel, silver, copper, etc.) in order to provide greater strength (doesn't compress/deform), but that also makes them conductive. I know of no metal filled thermal or structural epoxies that are conductive. Even silver filled thermal paste is generally not...
by E-HP
May 03 2021 9:23pm
Forum: EBike General Discussion
Topic: Help with choosing the right battery for powerful motor
Replies: 22
Views: 572

Re: Help with choosing the right battery for powerful motor

still need help with finding the right battery :( can I go for one that provides 80A output or it's gonna damage my motor? Yes, YOU can damage the motor, but it's up to your throttle hand. I would say it would be difficult to damage it, since I regularly put 60A at 72V into my 1000W 9C clone and ov...
by E-HP
May 03 2021 9:08pm
Forum: EBike Troubleshooting
Topic: Bike wont power on unless battery indicator is pressed
Replies: 2
Views: 82

Re: Bike wont power on unless battery indicator is pressed

Hi, I have a new battery for my ebike, I have fully charged the battery but it wont supply power to the bike unless i press the battery inicator on the battery (the power stops once the indicator light goes out 10 sec or so). The old battery works like it should. Any ideas? Have checked the fuses. ...
by E-HP
May 03 2021 8:38am
Forum: EBike General Discussion
Topic: Custom fiberglass / carbon frame battery case
Replies: 8
Views: 415

Re: Custom fiberglass / carbon frame battery case

Tomblarom wrote:
May 03 2021 8:28am
Going to try epoxy.
Just make sure the epoxy you are using isn't conductive, if you're using for your battery pack. A lot of epoxies are fortified with metal (steel, silver, copper, etc.) in order to provide greater strength (doesn't compress/deform), but that also makes them conductive.
by E-HP
May 03 2021 8:21am
Forum: Bike Mechanical & Structural
Topic: Welding down a torque arm
Replies: 42
Views: 784

Re: Welding down a torque arm

can you show me a pic of that? Can you post a pic of your frame's dropouts? yes, but but it will take a day or so, as camera is at work and bike is at home. By the way the fork drop outs are 1/8" thickness not 1/4" I misspoke. That's pretty thin, but I'm more interested in how flat the ar...
by E-HP
May 03 2021 8:18am
Forum: Bike Mechanical & Structural
Topic: Welding down a torque arm
Replies: 42
Views: 784

Re: Welding down a torque arm

I even use a torque arm with filled in steel strapping and no luck.1 or 2 pcs of strap. troque arm.JPG If you use shims, they should be placed on the flats, not the curved sections. I use a shim with my Grin torque arm to make it a near press fit. I use a piece of razor blade broken off to be the s...
by E-HP
May 03 2021 1:12am
Forum: EBike Technical
Topic: Regenerative braking help?
Replies: 10
Views: 339

Re: Regenerative braking help?

If you have no ebrake wires from the controller either as a pair for a switch for on/off braking or as a triple for a second throttle for variable braking force, then the only other way it could work is "slip regen", where when you roll off the throttle (rather than letting it go complete...
by E-HP
May 03 2021 12:55am
Forum: Bike Mechanical & Structural
Topic: Welding down a torque arm
Replies: 42
Views: 784

Re: Welding down a torque arm

RTLSHIP wrote:
May 02 2021 3:52pm
can you show me a pic of that?
Can you post a pic of your frame's dropouts?